AU2013203762B2 - Uses of thaxtomin and thaxtomin compositions as herbicides - Google Patents
Uses of thaxtomin and thaxtomin compositions as herbicides Download PDFInfo
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- AU2013203762B2 AU2013203762B2 AU2013203762A AU2013203762A AU2013203762B2 AU 2013203762 B2 AU2013203762 B2 AU 2013203762B2 AU 2013203762 A AU2013203762 A AU 2013203762A AU 2013203762 A AU2013203762 A AU 2013203762A AU 2013203762 B2 AU2013203762 B2 AU 2013203762B2
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- thaxtomin
- mbi
- weeds
- control
- grass
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Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
- A01N43/60—1,4-Diazines; Hydrogenated 1,4-diazines
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Pest Control & Pesticides (AREA)
- Plant Pathology (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Dentistry (AREA)
- General Health & Medical Sciences (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
Abstract There is a need for a selective, low-risk herbicide that can be used to control weeds in cereal cultures and turf. The present invention discloses that a bacterial secondary metabolite, thaxtomin and optionally another herbicide is an effective herbicide on broadleaved, sedge and grass weeds. Thaxtomin A and structurally similar compounds can be used as natural herbicides to control the germination and growth of weeds in cereal, turf grass, Timothy grass and pasture grass cultures with no phytotoxicity to these crops. As a natural, non-toxic compound, thaxtomin can be used as a safe alternative for weed control in both conventional and organic farming and gardening systems.
Description
USES OF THAXTOMIN AND THAXTOMIN COMPOSITIONS AS HERBICIDES FIELD OF THE INVENTION This invention relates to compositions and methods for controlling the germination and 5 growth of broadleaf, sedge and grass weeds using compounds comprising thaxtomin, a cyclic dipeptide produced by Streptomyces sp., as an active ingredient. BACKGROUND OF THE INVENTION Natural products are substances produced by microbes, plants, and other organisms. 10 Microbial natural products offer an abundant source of chemical diversity, and there is a long history of utilizing natural products for pharmaceutical purposes. However, secondary metabolites produced by microbes can also be successfully used for weed and pest control in agricultural applications. Thaxtomins (4-nitroindol-3-yl-containing 2,5-dioxopiperazines) are a family of dipeptide phytotoxins produced by plant-pathogenic Streptomyces sp. (S. scabies, S. acidiscabies) that cause 15 scab diseases in potato (Solanum tuberosum) (King, Lawrence et al. 1992). Toxin production occurs in diseased tissue and can also be elicited in vitro in an optimal growth medium containing oat bran (Loria, Bukhalid et al. 1995; Beausajour, Goyer et al. 1999). King and her coworkers (King, Lawrence et al. 2001) demonstrated that all plant pathogenic species in the Streptomyces family produce one or more thaxtomins with herbicidal activity. Hiltunen et al. (Hiltunen, Laakso et al. 20 2006) purified four thaxtomin analogs (thaxtomin A, thaxtomin A ortho isomer, thaxtomin B and thaxtomin D) from cultures of S. scabies and S. turbidiscabies and showed that all four compounds induced similar symptoms of reduced shoot and root growth, root swelling, (at 10-200 ppb) and necrosis (at 200-1000 ppb) on micropropagated in vitro cultures of potato. In addition, thaxtomins applied in combinations, showed additive effects, but no synergism (Hiltunen, Laakso et al. 2006). 25 According to Duke et al. (Duke, Baerson et al. 2003), both thaxtomin A (Figure 1) and thaxtomin D have marked activity as pre and post emergent, non-systemic herbicides, and concentrations of less than 1 uM of thaxtomin A causes cell swelling, necrosis and growth inhibition in mono and dicotyledonous seedlings (Healy, Wach et al. 2000). Thaxtomin has been evaluated as an herbicide by Dow Agro Sciences, Inc., and while active, it lacked systemic action (King, Lawrence et al. 2001). 30 The presence of the nitro group in the indole ring required for an L,L- configuration of the diketopiperazine appears to be the minimal requirement for phytotoxicity. The position of the nitro group in the indole ring is very site specific, and the phenyl portion of the phenylalanine plays a 1 necessary role in structural requirements of phytotoxicity (King, Lawrence et al. 1989; King, Lawrence et al. 1992; King, Lawrence et al. 2003). The herbicidal mode of action is based on disruption of cell wall synthesis (Fry and Loria 2002), with inhibition of cellulose biosynthesis being the main target (King et al., 2001; Duval et al., 2005; Johnson et al. 2007). Recently, Kang et al. (Kang, Semones et al. 2008) have described the use of thaxtomin and thaxtomin compositions as algaecides to control algae in water environments. SUMMARY OF THE INVENTION The present invention particularly relates to synergistic herbicidal compositions comprising at least two herbicides wherein a first herbicide is thaxtomin and a second herbicide comprises Atrazine, and to uses thereof. To the extent that the invention is described in broader terms below it is done so for completeness. The present invention discloses the use of thaxtomin as a pre or post-emergence herbicide against most common weeds in the cereal, pasture grass, Timothy grasses and turf grass , residential gardens, vineyards, orchards and park growth systems. A "growth system" may be any ecosystem for growing cereal, pasture grass, Timothy grass and turf grass. For example, a "cereal growth system" may be a cereal growth culture or may be a field containing planted cereal crops or cereal seeds. Similarly, a "turf grass growth system" may be a turf grass growth culture or may be a field, lawn or golf course containing planted turf grass or turf grass seeds. It can serve as a safer alternative to synthetic herbicides now on the market. A primary object of the invention is to provide novel herbicidal compositions against both broadleaf, sedge and grassy weeds, that contains thaxtomin as an active ingredient. Another object is to provide a safe, non-toxic herbicidal composition that does not harm cereal crops, pasture grass, Timothy grass or turf grass and a method that will not harm the environment. The above and other objects are accomplished by the present invention which is directed to herbicidal compositions containing at least one herbicidal agent, e.g., thaxtomin with optionally certain carriers to control the growth and germination of weeds in the cereal growth system and/or turf grass growth system and/or Timothy grass growth system and/or pasture grass growth system. In particular, the invention is further directed to an herbicidal composition for use in modulating the germination and growth of monocotyledonous and/or dicotyledenous and/or sedge weeds in a cereal growth system. In a particular embodiment, the cereal growth system is a non-rice cereal growth system comprising at least one herbicide in which said herbicide is thaxtomin. The compositions 2 (followed by page 2A) of the present invention may further comprise a carrier and/or diluent. In a particular embodiment, the composition is an aqueous composition. In another particular embodiment, the thaxtomin in the composition is dissolved in a diluent comprising an organic solvent such as ethanol, isopropanol, or an aliphatic ketone such as acetone, methyl ethyl ketone, methyl isobutyl ketone. In a related aspect, the invention is directed to the use of at least one herbicidal agent, e.g., 2A (followed by page 3) thaxtomin, in the formulation of an herbicide for modulating monocotyledonous and/or dicotyledenous and/or sedge weeds in a cereal growth system, e.g., a non-rice cereal growth system. Similarly, the invention is directed to the use of at least one herbicidal agent in formulation of an herbicide for modulating monocotyledonous and/or dicotyledenous and/or sedge weeds in a turf 5 grass growth system and/or Timothy grass growth system and/or pasture grass growth system, wherein at least one herbicidal agent is thaxtomin. The compositions of the present invention may comprise in addition to thaxtomin, at least one or more herbicides. Thus the invention may comprise a thaxtomin and a chemical herbicide and/or bioherbicide. Compositions comprising thaxtomin and at least a second herbicide may be used 10 in cereal growth systems (e.g., wheat, triticale, barley, oats, rye, corn, sorghum, sugarcane, rice or millet) and/or turf grass growth systems and/or Timothy grass growth systems and/or pasture grass growth systems and/or residential gardens, vineyards, orchards and park systems and/or aquatic systems. In a particular embodiment these compositions may be used to modulate growth of broadleaf, sedge and grassy weeds, The compositions may also be used to modulate growth of 15 aquatic weeds which include but are not limited to Ammania sp., Alisma plantago-aquatica, Cyperus sp., Leptochloa sp. Given that the invention is directed to the use of thaxtomin as a pre- or post-emergence herbicide, the invention is directed to a method for selectively modulating germination and growth of monocotyledonous, dicotyledonous and sedge weeds in a cereal crop growth system. In a particular 20 embodiment, the cereal growth system is a non-rice cereal crop growth system comprising applying to said weeds or soil in said cereal crop growing system at least one herbicidal agent, wherein said herbicidal agent is thaxtomin, in an amount of effective to modulate germination and growth of said weeds but not modulate growth of cereal crop in said cereal crop growth system. The cereal crop may include but is not limited to corn, wheat, triticale, barley, rye, oats, sorghum, sugarcane, and 25 millet. The invention is further directed to a method for modulating germination and growth of monocotyledonous, dicotyledonous and sedge weeds in a turf, pasture and/or Timothy grass growth system comprising applying to said weeds or soil in said turf grass growing system at least one herbicidal agent, wherein said herbicidal agent is thaxtomin, in an amount of effective to modulate growth of said weeds but not modulate germination and growth of turf grass in said turf grass growth 30 system, pasture grass in said pasture grass growth system and/or Timothy grass in said Timothy grass growth system. As noted above, the method of the present invention may also involve the use of at least a second herbicidal agent. The two herbicidal agents may be applied together in one formulation or 3 separately in two formulations. Thus, provided is a combination comprising thaxtomin and a second herbicidal agent. The combination may be a synergistic combination. In a particular embodiment, the E/Ee ratio is at least about 1.2, 1.5, 1.7, 1.9, 2.0, 2.5, or higher. Control of weeds can be achieved by using thaxtomin A in a tank mix or rotation with other 5 herbicidally active compounds known to have good activity against grass weeds but no or low phytotoxicity against cereal crops and/or turf grass and/or, pasture grass and/or Timothy grasses. In particular, the invention relates to a method for modulating growth of monocotyledonous, dicotyledonous and sedge weeds comprising applying to said weeds an amount of thaxtomin and amount of at least a second herbicidal agent to modulate growth of said weeds. The two herbicidal 10 agents may be applied together in one formulation or separately in two formulations. The thaxtomin and second herbicidal agent may be applied in a cereal growth system (e.g., wheat, triticale, barley, oats, rye, corn, sorghum, sugarcane, rice or millet) and/or turf grass growth system and/or pasture grass growth system and/or Timothy grass growth sysem. 15 BRIEF DESCRIPTION OF THE FIGURES Figure 1 shows the structure of Thaxtomin A. Figure 2 shows the pre-emergent effect of MBI-005 + Manuka oil on crabgrass DETAILED DESCRIPTION OF THE INVENTION 20 Where a range of values is provided, it is understood that each intervening value, to the tenth of the unit of the lower limit unless the context clearly dictates otherwise, between the upper and lower limit of that range and any other stated or intervening value in that stated range is encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included in the smaller ranges is also encompassed within the invention, subject to any specifically 25 excluded limit in the stated range. Where the stated range includes one or both of the limits, ranges excluding either both of those included limits are also included in the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although any methods and materials similar or equivalent to those described herein can also be used 30 in the practice or testing of the present invention, the preferred methods and materials are now described. It must be noted that as used herein and in the appended claims, the singular forms "a," "and" and "the" include plural references unless the context clearly dictates otherwise. 4 Thaxtomin utilized in this invention may be derived in fermentation of the following actinomycetes cultures: S. scabies - ATCC 49173, S. acidiscabies - ATCC 49003 and BL37-EQ-010 - or it can be purchased from commercial sources. The thaxtomin utilized in the invention include but are not limited to agents described as 5 cyclic dipeptides having the basic structure cyclo-(L-4-nitrotryptophyl-L-phenylalanyl). In embodiments, suitable diketopiperazne moieties may be N-methylated, and include congeners carrying phenylalanyl alpha andring-carbon hydroxyl groups. The chemical in a particular embodiment comprises: NO2 O H R3 R6 N N. N H R . R 5 R2 10 R 4 wherein R 1 is methyl or H, R 2 is hydroxy or H, R 3 is methyl or H, R 4 is hydroxy or H, R 5 is hydroxy or H, R6 is hydroxy or H, and combinations thereof Non limiting examples of suitable thaxtomin is for use in accordance with the present 15 invention include but are not limited to thaxtomin A, thaxtomin A ortho isomer, thaxtomin B, thaxtomin C, hydroxythaxtomin C, thaxtomin A p-isomer, hydroxythaxtomin A and des-N-methylthaxtomin C and derivatives of any of these (See Figure 1). Compositions 20 The compositions of the present invention may be sprayed on the plant or applied to soil. Particular embodiments are described in the Examples, infra. These compositions may be in the form of dust, coarse dust, micro granules, granules, wettable powder, emulsifiable concentrate, liquid preparation, suspension concentrate, water degradable granules or oil suspension. The compositions of the invention do comprise a carrier and/or diluent. The term, 'carrier' as 25 used herein means an inert, organic or inorganic material, with which the active ingredient is mixed or formulated to facilitate its application to plant or other object to be treated, or its storage, transport 5 and/or handling. Examples of diluents or carriers for the pre- and post-emergence herbicides include, but are not limited to, water, milk, ethanol, mineral oil, glycerol. The compositions of the present invention may comprise at least two herbicidal agents. One herbicidal agent is thaxtomin set forth above. It may be present in one embodiment thaxtomin is 5 present in an amount ranging from about 0.01 to about 5.0 mg/mL. The other herbicidal agent may be a bioherbicide and/or a chemical herbicide. The bioherbicide may be derived from a plant, or may be a microbial bioherbicide. In particular, the bioherbicide derived from a plant may be derived from pepper (e.g., sarmentine) or may be a plant essential oil (e.g., lemongrass oil). The microbial bioherbicide may be derived from bacteria (e.g. Streptomyces sp., Burkholderia sp., particularly 10 Burkholderia sp. or fractions, supernatant, filtrate, or compounds derived therefrom which disclosed in WO/2011/106491 and PCT/US12/50807, the contents of which are incorporated herein by reference or fungus. The bioherbicide may be selected from the group consisting of clove, cinnamon, lemongrass, citrus oils, orange peel oil, bialaphos, cornexistin, AAL-toxin, leptospermone and other triketones (such as 2-(2-nitro-4-trifluoromethylbenzoyl)cyclohexane-1,3-dione, flavesone, 15 grandiflorone, etc.), sarmentine or sarmentine analog, momilactone B, sorgoleone, ascaulatoxin, manuka oil, Phoma macrostoma, d-limonene, m-tyrosine, tentoxin, nethylated seed oil, chelated iron, acetic acid and ascaulatoxin aglycone. In a particular embodiment, the composition may comprise thaxtomin, lemongrass oil and optionally a surfactant and/or vegetable oil. In another embodiment, the composition may comprise thaxtomin, sarmentine and optionally a nonionic 20 surfactant and/or vegetable oil. In another particular embodiment, the composition may comprise thaxtomin, bialaphos (also known as bialafos) and optionally a nonionic surfactant and/or vegetable oil. The bioherbicide such as lemongrass oil, bialaphos (bialfos), manuka oil, sarmentine, sarmentine analog, Burkholderia species may be present in an amount ranging from about 0.01 mg/mL to about 100 mg/mL and more preferably between about 0.025 mg/mL to about 50 mg/mL 25 The chemical herbicide may be selected from the group consisting of 2,4-D, Acetochlor, Acifluorfen, Amicarbazone, Anilofos, Asulam, Atrazine, Bensulfuron, Bentazone, Byspiribac-sodium, Carfentrazone, Chlorthiamid, Clomazone, Cyhalofop-butyl, Dicamba, Diclofop, Dithiopyr, Diuron, EPTC, Fenoxaprop, Flumioxazin, Fluridone, Fluroxypyr, Fomesafen, Glufosinate, Glyphosate, Halosulfuron, Imazethapyr, Indazifam, Isoxaben, Linuron, 30 MCPA (4-chloro-2-methylphenoxy acetic acid), MCPP, Mesotrione, Metolachlor, Metribuzin, MSMA, Napropamide, Nicosulfuron, Norflurazon, Oleic acid, Oryzalin, Oxadiazon, Oxyfluorfen, Quinclorac, Pelargonic acid, Pendimethalin, Penoxsulam, Picloram, Propanil, 6 Pyrithrobac-sodium, Rimsulfuron, Saflufenacil, Sethoxydim, Simazine, Sulcotrione, Thiazopyr, Thiencarbazone, Thiobencarb, Triclopyr, Trifluralin, Trioxysulfuron-sodium. The chemical herbicide such as pendimethalin or clomazone, atrazine, oryzalin, trifluralin and metolachlor may be present in a pre-emergent weed control application in an 5 amount ranging from about 0.01 mg/mL to about 50 mg/mL and a chemical herbicide such as clomazone, cyhalofop, oryzalin, S-metolachlor, bispyribac-sodium, glyophosate, glufosinate, mesotione, penoxsulam, carfentrazone, quinclorac, triclopyr-ester, trioxysulfuron-sodium, thiobencarb, propanil, 2,4-D, dicamba in a pre or post-emergent application from about 0.1 mg/mL to about 60 g a.i./mL or 0.03 kg a.i./ha to 5.6 kg a.i./ha. The composition may further 10 comprise an adjuvant which may be vegetable oil comprising ethyl oleate, polyethylene dialkyl ester and ethoxylated nonylphenol. The composition may additionally comprise a surfactant to be used for the purpose of emulsification, dispersion, wetting, spreading, integration, disintegration control, stabilization of active ingredients, improvement of fluidity or rust inhibition. The choice of dispersing and emulsifying agents, such as non-ionic, anionic, 15 amphoteric and cationic dispersing and emulsifying agents, and the amount employed is determined by the nature of the composition and the ability of the agent to facilitate the dispersion of the herbicidal compositions of the present invention. For post-emergent formulations, the formulation components used may contain smectite clays, attapulgite clays and similar swelling clays, thickeners such as xanthan gums, gum Arabic and 20 other polysaccharide thickeners as well as dispersion stabilizers such as nonionic surfactants (for example polyoxyethylene (20) monolaurate or polysorbate 60 POE (20) sorbitan monostearate, ethylene glycol monostearate). The concentration of the clays may vary between about 0-2.5% w/w of the total formulation, the polysaccharide thickeners may range between about 0-0.5% w/w of the total formulation and the surfactants may range from about 0-5% w/w of the total formulation. 25 Uses The compounds, combinations and compositions set forth herein may be used to modulate the emergene and/or growth of various weeds and can thus be used in pre-emergent and post-emergent applications. Said weeds may include but are not limited to Echinochloa 30 phyllopogon, Echinochloa colona, Echinochloa oryzoides, Echinochloa crus-galli, Schoenoplectus spp., Heteranthera spp., Monochoria spp., Bacopa spp., Sagittaria spp., Oryza 7 punctata and Oryza sativa (weedy). The application we filed also includes the following targets: Chenopodium sp. (e.g., Chenopodium album, Chenopodium murale), Abutilon sp. (e.g., Abutilon theophrasti), Helianthus sp. (e.g., Helianthus annuus), Ambrosia sp. (e.g., Ambrosia artemesifolia, Ambrosia trifida), Amaranthus sp. (e.g., Amaranthus retroflexus, Amaranthus 5 palmer, Amaranthus rudis, Amaranthus spinosus, Amaranthus tuberculatus), Convolvulus sp. (e.g., Convolvulus arvensis), Brassica sp. (e.g., Brassica kaber), Taraxacum sp. (e.g., Taraxacum officinale), Solanum sp. (e.g., Solanum nigrum, Solanum elaeagnifolium, Solanum physalfolium, Solanum ptycanthum), Malva sp. (e.g., Malva neglecta), Setaria sp. (e.g., Setaria lutescens), Bromus sp. (e.g., Bromus tectorum, Bromus diandrus, Bromus hordeaceus), Poa sp. 10 (e.g., Poa annua, Poa pratensis), Lolium sp. (e.g., Lolium perenne, Lolium rigidum, Lolium multiflorum L. var. Pace), Festuca sp. (e.g., Festuca arundinaceae, Festuca rubra), Echinochloa sp. (e.g., Echinochloa crus-galli, Echinochloa colona), and particularly, Lambsquarter Chenopodium album, Redroot Pigweed - Amaranthus retroflexus, Wild Mustard - Brassica kaber, Dandelion - Taraxacum officinale, and Black Nightshade - Solanum nigrum, Oxalis sp. 15 (e.g., Oxalis stricta, Oxalis pes-caprae, Oxalis corniculata); Cyperus sp. (e.g., Cyperus difformis); Conyza sp. (e.g., Conyza canadensis, Conyza sumatrensis, Conyza bonariensis); Sagina sp. (e.g., Sagina procumbens); Veronica sp. (e.g., Veronica hederafolia), Stellaria sp. (e.g., Stellaria media), Rorippa sp. (e.g., Rorippa islandica), Senecio sp. (e.g., Senecio vulgaris), Lamium sp. (e.g., Lamium amplexicaule), Digitaria sp. (e.g., Digitaria sanguinalis, Digitaria 20 ischaemum), Galium sp. (e.g., Galium aparine), Galinsoga sp. (e.g., Galinsoga aristatula), Cardamine sp. (e.g., Cardamineflexuosa, Cardamine hirsuta), Kochia sp. (e.g., Kochia scoparia), Eleusine sp. (e.g., Eleusine indica), Portulaca sp. (e.g., Portulaca oleraceae), Plantago sp. (e.g., Plantago lanceolata), Euphorbia sp. (e.g., Euphornia supina, Euphorbia maculate, Euphorbia esula, Euphorbia prostrata), Erodium sp. (e.g., Erodium cicutarium), 25 Sonchus sp., (e.g., Sonchus oleraceus), Lactuca sp. (e.g., Lactuca serriola), Capsella sp. (e.g., Capsella bursa-pastoris), Leptochloa sp. (e.g., Leptochloafascicularis, Leptochloa virgata), Raphanus sp. (e..g., Raphanus raphanistrum), Calandrinia sp. (e.g., Calandrinia ciliata), Paspalum sp. (e.g., Paspalum dilatatum), Gnaphalium sp., Cynodon sp. (e.g., Cynodon dactylon, Cynodon hirsutus), Polygonum sp. (e.g., Polygonum arenastrum, Polygonum lapathofolium,), 30 Avenafatua, Hordeum sp. (e.g., Hordeum leporinum), Urtica sp. (e.g., Urtica urens), Tribulus terrestris, Sisymbrium sp. (e.g., Sisymbrium irio), Cenchrus sp., Salsola sp. (e.g., Salsola tragus, 8 Salsola kali), Amsinckia sp. (e.g., Amsinckia lycopsoides), Ipomoea sp., Claytonia perfoliata, Polypogon sp. (e.g., Polypogon monspeliensis), Xanthium sp., Hypochaeris radicata, Physalis sp., Eragrostis sp., Verbascum sp., Chamomilla suaveolens, Centaurea sp. (e.g., Centaurea solstitialis), Epilobium brachycarpum, Panicum sp. (e.g., Panicum capilare, Panicum 5 dichotomiflorum), Rumex acetosella, Eclipta sp. (e.g., Eclipta alba, Eclipta prostrata), Ludwigia sp., Urochloa sp. (e.g. Urochloa platyphylla, Urochloa panicoides), Leersia sp., Sesbania sp. (Sesbania herbacea), Rotala sp., Ammania sp., Alternathera philoxeroides, Commelina sp., Sorghum halepense, Parthenium hysterophorus, Chloris truncata 10 EXAMPLES The composition and method of the present invention will be further illustrated in the following, non-limiting Examples. The examples are illustrative of various embodiments only and do not limit the claimed invention regarding the materials, conditions, weight ratios, process parameters and the like recited herein. 15 EXAMPLE 1 In a pot study test in greenhouse conditions, 6-inch corn plants (Zea mays var. Sunglow) were sprayed with increasing concentrations of thaxtomin A mixed in a carrier 4% ethanol, 0.02 % polysorbate 60 POE (20) sorbitan monostearate solution. The spraying solutions contained 0.125, 20 0.25, 0.5 and 1.0 mg thaxtomin A/mL, and the plants are sprayed until total coverage. Each treatment was done in three replicates, and a control solution consists of water with 4% ethanol and 0.02 % polysorbate 60 POE (20) sorbitan monostearate as a surfactant. Prior to and after treatments, plants are grown in a greenhouse under artificial lights (12-h light/dark cycle) at 25C. Plants are evaluated in one-week intervals starting at 7 days after treatment. The final 25 evaluation is done three weeks after treatment, at which time point, no phytotoxicity is observed in any of the test plants even at the highest thaxtomin A concentration. EXAMPLE 2 A pot study is conducted to test the phytotoxicity of thaxtomin A on corn (Zea mays var. 30 Early Sunglow) and wheat (Triticum aestivum var. PR1404). To confirm the activity on broadleaf weeds, pigweed (Amaranthus sp.) is planted in the same pot with either three corn or five wheat seeds, and sprayed simultaneously with the cereal test plants. The less than 3-inch tall plants grown 9 under growth lights (12-h light/12-h dark) at 28 0 C are sprayed with thaxtomin A solutions derived from a liquid culture of S. acidiscabies containing 0.5, and 1.0 mg thaxtomin A per mL of solvent (4 % ethanol and 0.2% non-ionic surfactant). A solution of 4 % ethanol + 0.2% non-ionic surfactant without thaxtomin A is used as a control treatment. Each treatment is conducted in three replicates. 5 Treated plants are kept at 28 0 C under growth lights and observed at three time points - 7, 14 and 21 days after treatment - for visual symptoms of phytotoxicity on corn and wheat and % control of pigweed. At each time point, no symptoms of phytotoxicity are observed in the cereal plants treated with thaxtomin A. The highest concentration of thaxtomin A (1.0 mg/ntL) results in a complete 10 control of pigweed grown in the same pots with corn and wheat. EXAMPLE 3 To test the phytotoxicity of thaxtomin A on sorghum plants, five seeds of sorghum (Sorghum bicolor) are planted in each 4"x 4" plastic pot filled with soil. Plants were grown under optimal 15 conditions in a greenhouse before and after treatment with solutions containing 0.5 and 1.0 mg thaxtomin A /mL. At the time of the treatment, the plants are about 3 inches tall. Each treatment is applied in three replicates, and a control treatment included plants treated with just the carrier (4% EtOH, 0.02 % polysorbate 60 POE (20) sorbitan monostearate). Evaluations for phytotoxicity are performed at 7-day intervals starting one week after treatment. The last evaluation is performed three 20 weeks after the treatment at which point, no phytotoxicity is observed in the treated plants in any treatment concentration. EXAMPLE 4 A strain of S. acidiscabies (ATCC-49003) is grown in oat bran broth for 5 days (25 0 C, 25 200rpm). The whole cell broth with thaxtomin A is extracted using XAD resin. The dried crude extract was resuspended in 4% ethanol and 0.02 % non-ionic surfactant at a concentration of 10 mg/mL, and the solutions with two different concentrations of thaxtomin A (0.5 and 1.0 mg/mL) are tested the following broadleaf weed species: Lambsquarter - Chenopodium album 30 Velvetleaf- Abutilon theophrasti Sunflower - Helianthus annuus Ragweed, Common - Ambrosia artemesifolia 10 Pigweed , Redroot - Amaranthus retroflexus Bindweed, Common - Convolvulus arvensis Mustard, Wild - Brassica kaber Dandelion - Taraxacum officinale 5 Nightshade, Black - Solanum nigrum Mallow, Common - Malva neglecta and on the following grass weed species: Foxtail - Setaria lutescens Brome, Downy - Bromus tectorum 10 Bluegrass, Annual - Poa annua Bluegrass, Kentucky - Poa pratensis Ryegrass, Perennial - (Lolium perenne L. var. Pace) Fescue, Tall - (Festuca arundinaceae Schreb. var. Aztec II, Anthem II, LS 1100) Barnyard Grass - Echinochloa crus-galli 15 All plant species are tested in 4"x4" plastic pots in three replicates. The untreated control plants are sprayed with the carrier solution (4% Ethanol, 0.02% glycosperse) and the positive control plants with Roundup at a rate corresponding to 1 fl. oz/acre. Treated plants are kept in a greenhouse under 12h light/12h dark conditions. Data for broadleaf species from weekly evaluations are presented in Table 1. 20 Table 1. Weed control efficacy of a S. acidiscabies extract containing thaxtomin A on different weed species. Rating scale: 0 - no control, 1 - 10% control, 2 - 25% control, 3 - 50% control, 4 - 75% control, 5 - 100 % control. Weed UTC THAXTOMIN THAXTOMIN species SOLUTION SOLUTION 1.0 mg/mL 0.5 mg/mL 7DAYS 14DAYS 21DAYS 7DAYS 14DAYS 21DAYS 7DAYS 14DAYS 21DAYS III I I Dandelion 0.0 0.0 0.0 2.0 2.3 4.0 2.0 2.0 3.7 Nightshade 0.0 0.0 0.0 2.7 2.2 2.3 2.7 2.0 2.3 Lambsquarter 0.0 0.0 0.0 2.0 2.0 2.0 2.0 2.0 2.0 Ragweed 0.0 0.0 0.0 1.0 0.5 0.0 1.0 0.5 0.0 Velvetleaf 0.0 0.0 0.0 1.7 1.0 1.0 2.0 1.0 0.3 Bindweed 0.0 0.0 0.0 1.0 1.0 0.0 1.2 1.0 0.0 11 Mustard 0.0 0.0 0.0 3.3 4.0 4.5 3.5 2.8 3.5 Sunflower 0.0 0.0 0.0 1.0 2.0 0.5 1.0 1.7 0.5 Mallow 0.0 0.0 0.0 1.0 1.0 1.0 1.2 1.0 1.0 Pigweed 0.0 0.0 0.0 3.5 4.0 4.0 4.2 3.0 3.7 The extract from a bacterial culture of S. acidiscabies with a thaxtomin A concentration of 0.5 mg/mL or higher showed good efficacy (>50%) against at least three of the most common broadleaf weed species (dandelion, mustard and pigweed) in both cereal and turf growing systems. Control of some weeds such as Black nightshade and Common lambsquarter was not complete but thaxtomin A 5 even at the lower concentration (0.5 mg/mL) results in severe stunting of these weeds. In this same study, no adverse effects are observed in grass species treated with either 0.5 or 1.0 mg/mL thaxtomin A. In all tested grass species, no phytotoxic effects were visible at even the higher thaxtomin A concentration. 10 EXAMPLE 5 The combined effect of thaxtomin A and two commercial herbicides (Bipyribac-sodium formulated as Regiment and Lemongrass oil formulated as GreenMatch EX) on small-flower umbrella sedge and watergrass is tested in a field study using small (1- sq foot) plots. All single product treatments and tank mix combinations were sprayed at 57 gal per acre. Evaluation of % control was 15 done 14 days after treatment and the results are presented in Table 2 below. Means in each column marked with the same letter in Table 2 are not statistically different from each other at p<0.05 According to the results, lemongrass oil at 1.25% weight does not improve the efficacy of thaxtomin A (at 0.25 mg/mL) on sedge but it significantly increases the efficacy on grass weeds such as watergrass (field test) and sprangletop (greenhouse test). 20 12 Table 2. Effect of thaxtomin A alone and in combination with bispyribac-sodium and lemongrass oil on two rice weeds, small-flower umbrella sedge and watergrass. Treatment Sedge control (%) Watergrass control (%) Thaxtomin 0.25 mg/mL 95a 5d Thaxtomin 0.5 mg/mL 100a 5d Bispyribac-sodium (12 g/acre) 87.5a 32.5a (12 g/acre) Bispyribac-sodium M (6g/acre) 47.5c 15c Bispyribac-sodium % + 67.5b 25 ab Thaxtomin 0.5 mg/mL Bispyribac-sodium %/ + 55bc 7.5 c Thaxtomin 0.25 mg/mL Lemongrass oil 5 % 15d 10c Lemongrass oil 2.5% 12.5d 10c Lemongrass oil 1.25% 20d 5d Lemongrass oil 1.25% + 100a 10c Thax 0.25 mg/mL Lemongrass oil 1.25% + 100a 20b Thaxtomin 0.5 mg/mL 5 13 According to the results, lemongrass oil at 1.25% does not improve the efficacy of thaxtomin A (at 0.25 mg/mL) on sedge but it significantly increases the efficacy on grass weeds such as watergrass (field test) and sprangletop. Thaxtomin A (at 0.5 mg/mL) improves the efficacy of an ALS inhibitor, 5 bipyribac sodium; used at half label rate on both sedge and grasses. EXAMPLE 6 The efficacy of thaxtomin A derived from a liquid culture of S. acidiscabies is tested in a field study on rice using 4.9 sq-ft plots surrounded by a metal ring. Treatments with either thaxtomin A or 10 thaxtomin A in combination with lemongrass oil (formulated as GreenMatch EX) or cyhalofop (formulated as Clincher CA) were done using a hand-held sprayer with a water volume corresponding to 57 gallons per acre. Rice (variety M209) was grown until maturity and harvested by hand for yield and weed count assessment. Results of yield (kg/ha), and numbers of redstem, small-flower umbrella sedge, and sprangletop in each plot are presented in Table 3 below. 15 Table 3. Effect of thaxtomin A alone and in combination with lemongrass oil and cyhalofop on rice yield and weed control. Treatment Yield (kg/ha) # of redstem # of sedge # of sprangletop 1 7516b 10.3 0.8a 86.0a 2 7876b 0.5b 1.0a 76.0a 3 9054ab 0.3b 0.5a 69.3a 4 11296a 12.8a 0.5a 4.0b 20 1. UTC; 2. Thaxtomin A (180 g/acre); 3. Lemongrass oil 1.25% + thaxtomin A (90 g/acre); 4. Cyhalofop (half label rate; 52 g/acre) + thaxtomin A (90 g/acre) + veg oil 2.5 % Means in each column marked with the same letter are not statistically different from each other at p< 0
.
05 . Results indicate that thaxtomin at 180 g/acre significantly reduced the number of sedges but 25 had no effect on sprangletop or yield. When used at half rate (thaxtomin A 90 g/acre), a combination with lemongrass oil had better effect on sedges than a combination with cyhalofop (used at half label rate 52 g/acre). Good grass weed (sprangletop) control is achieved when thaxtomin (90 g/acre) is combined with cyhalofop at half the label rate - this combination also improves the yield significantly. 30 EXAMPLE 7 14 Cyhalofop (2-[4-(4-cyano-2-fluorophenoxy)phenoxy]propanoic acid, butyl ester) is also mixed together with adjuvant containing ethyl oleate, polyethylene dialky ester and ethoxylated nonylphenol (2.5 % v/v) and increasing concentrations of thaxtomin A (purified from the ATCC strain 49003) at concentrations 0.1, 0.2 and 0.4 mg/ml. The concentrations of the 2-[4-(4-cyano 5 -fluorophenoxy)phenoxy]propanoic acid, butyl ester before dilution are 29.6% (2.38 lb/gal) and 21.7% (2 lb/gal), respectively. The effect of these mixtures on the growth of common water plantain, red stem, smallflower sedge and sprangletop is determined in the greenhouse. Similarly, rice plants of variety M104 are grown and tested for phytotoxic effects, and all plants are evaluated 7, 14, and 21 days after treatment. Results of from the study with cyhalofop formulated as Clincher CA at the 21-day 10 evaluation point are presented in Table 4 below. Table 4. Effect of thaxtomin A alone and with cyhalofop on rice yield and weed control Cyhalofop (6.5 oz/acre) + Redstem Waterplantain Sedge Sprangletop Thaxtomin A (mg/mL) % control % control % control % control UTC 0 0 0 0 0-no thxA 75 8 0 90 0.1 100 85 87 100 0.2 97 87 88 100 0.4 100 85 100 100 As a conclusion, Clincher CA (29.6% cyhalofop by weight) applied at half label rate (6.5 oz/acre) has 15 good efficacy against grass weeds - not so good on broadleaves and poor on sedges. A combination of Clincher CA (cyhalofop) and thaxtomin A provides good control of all rice weeds tested in this study. Efficacy of thaxtomin A against grass weeds is substantially improved if combined with Clincher. Combination of thaxtomin A with Clincher CA did not cause phytotoxicity on rice at any tested concentration. 20 EXAMPLE 8 Penoxsulam(2-(2,2-difluoroethoxy)-N-(5,8-dimethoxy[ 1,2,4]triazolo[ 1,5c]pyrimidin-2-yl)-6 trifluoromethyl)benzenesulfonamide) is mixed together with adjuvant containing ethyl oleate, polyethylene dialky ester and ethoxylated nonylphenol (2.5 % v/v) and increasing concentrations of 25 thaxtomin A (purified from the ATCC strain 49003) at concentrations 0.1, 0.2 and 0.4 mg/ml. The concentrations of the 2-[4-(4-cyano- -fluorophenoxy)phenoxy]propanoic acid, butyl ester or 2-(2,2-difluoroethoxy)-N-(5,8-dimethoxy[1,2,4]triazolo[ 1,5c]pyrimidin-2-yl)-6-trifluoromethyl)benz enesulfonamide before dilution are 29.6% (2.38 lb/gal) and 21.7% (2 lb/gal), respectively. The effect 15 of these mixtures on the growth of common water plantain, red stem, smallflower sedge and sprangletop is determined in the greenhouse. Similarly, rice plants of variety M104 are grown and tested for phytotoxic effects, and all plants are evaluated 7, 14, and 21 days after treatment. 5 EXAMPLE 9 A strain of S. acidiscabies was grown in oat bran broth for 5 days (25C, 200 rpm). The whole cell broth was extracted using XAD resin, and the dried crude extract was resuspended in 4% ethanol and 0.2 % non-ionic surfactant at a concentration of 10 mg/mL. The diluted extracts containing 0.2 and 0.4 mg thaxtomin A per mL were tested on three weed species (redstem; Ammania spp., smallflower 10 umbrella sedge; Cyperus difformis and sprangletop: Leptochloa uninervia). Other treatments included sarmentine at 2.5 and 5.0 mg/mL, and a combination treatment containing 0.2 mg thaxtomin A and 2.5 mg sarmentine per mL. Each treatment was applied in three replicates. Treated plants were kept in a greenhouse under 12h light/12h dark conditions. Results from an evaluation performed 25 days after treatment are presented in Table 5. 15 Table 5. Efficacy of herbicidal treatments using thaxtomin A (0.2 and 0.4 mg/mL) or sarmentine (2.5 or 5.0 mg/mL) alone or in combination (0.2 + 2.5 mg/mL) to control broadleaf, sedge and grass weeds in a greenhouse study. Treatment Control of redstem Control of sedge Control of (%) (%) sprangletop (%) UTC Oa Oa Oa Thaxtomin A 0.2 mg/mL 5.Ob 48.3b 8.3ab Thaxtomin A 0.4 mg/mL 11.7c* 91.7d 10.0b Thaxtomin 0.2 + 11.7c* 61.7c 73.3c Sarmentine 2.5 mg/mL Sarmentine 2.5 mg/mL Oa 8.3a 80.Oc Sarmentine 5.0 mg/mL 2.5ab 6.7a 92.3d * stunted. In a column, Means followed by the same letter are not statistically different from each other 20 at p< 0.05. Thaxtomin A at the highest concentration of 0.4 mg/mL provides excellent control of sedge but poor control of the grass weed (sprangletop). When combined with sarmentine, the efficacy against 16 grass weeds improves significantly. Also, efficacy against sedge is improved with the combination treatment compared with the single application of thaxtomin A alone at the corresponding concentration. In this study, the control of the broadleaf weed (redstem) is poor with all treatments. 5 Example 10 Bialaphos is produced by bacteria Streptomecyes spp. and its synthesized active ingredient glufosinate is marketed as Rely® 200 (Bayer CropScience, Research Triangle Park, NC). Bialaphos has a non-selective property and inhibits the activity of glutamine synthetase, an enzyme involved in the synthesis of the amino acid glutamine. 10 The MBI-005 and bialaphos were prepared at various concentrations either as single ingredients or in combination with bialaphos. The treatments were applied at approximately 2/3 ml per replicate with a hand-help spray nozzle to barnyard grass or sedge. There were 3 replicates per treatment which were randomized after spray and were kept in a greenhouse at 25'C for evaluation of phytotoxicity (% control). 15 When MBI-005 was mixed with bialaphos, the efficacy was increased several times more than when they were used alone (Table 6, 7, and 8). At higher rates of the mixtures, 100% control was achieved (Table 8). Synergy was observed when bialaphos at 0.178 mg/mL was mixed with MBI-005 at 0.25 mg/mL, and about 42% efficacy was achieved when the rate of bialaphos was increased close to 1.0 mg/mL from 10% control with bialaphos alone (Table 7). 20 17 Table 6. Effects of bialaphos, MBI-005 (thaxtomin A), and the combinations of bialaphos with MBI-005 in controlling barnyard grass. Bialaphos MBI-005 %Control E/Ee Treatment (mg/mL) (mg/L) (14 days) Untreated Control (deionized water) 0.0 a* Bialaphos 0.089 0.0 a Bialaphos 0.178 0.0 a Bialaphos 0.356 0.0 a Bialaphos 0.534 0.0 a Bialaphos 0.712 0.0 a Bialaphos 0.890 1.3 ab Bialaphos 1.068 5.0 abc MBI-005 (thaxtomin A) 0.25 1.3 ab Bialaphos + MBI-005 0.089 0.25 1.3 ab 1.0 Bialaphos + MBI-005 0.178 0.25 3.8 abc 3.0 Bialaphos + MBI-005 0.356 0.25 11.9 C 9.5 Bialaphos + MBI-005 0.534 0.25 29.4 d 23.5 Bialaphos + MBI-005 0.712 0.25 34.4 d 27.5 Bialaphos + MBI-005 0.890 0.25 59.4 e 23.9 Bialaphos + MBI-005 1.068 0.25 62.5 e 10.1 * Treatment means in each column marked with the same letter are not statistically different at LSD at p=0.05 level. 5 * Synergy is calculated from Colby's formula (Colby, 1967. Weeds 15:20-22): Ee = X + Y -(XY/100) (Where E is the observed efficacy of product A + B, Ee is expected efficacy of A + B, and X and Y are the efficacy of product A or B when used alone. If E/Ee < 1 the combination is antagonistic; if E/Ee = 1 the combination is additive; if E/Ee > 1 the combination is synergistic). 18 Table 7. Effects of bialaphos, MBI-005 (thaxtomin A), and the combinations of bialaphos with Bialaphos MBI-005/011 %Control E/Ee Treatment (mg/mL) (mg/mL) (14 days) Untreated Control (deionized water) 0.0 a* Bialaphos 0.18 6.7 be Bialaphos 0.53 3.3 ab Bialaphos 1.07 10.0 c MBI-005 (thaxtomin A) 0.25 6.7 bc Bialaphos + MBI-005 0.18 0.25 5.0 abc 0.4 Bialaphos + MBI-005 0.53 0.25 25.0 d 2.6 Bialaphos + MBI-005 1.07 0.25 41.7 e 2.6 MBI-005 in controlling barnyard grass. 5 *Treatment means in each column marked with the same letter are not statistically different with LSD test at p=0.05 level 10 Table 8. Effects of bialaphos, MBI-005 (thaxtomin A), and the combinations of bialaphos with MBI-005 or MBI-011 in controlling barnyard grass. Treatment Bialaphos MBI-005 %Control %Control E/Ee (mg/mL) (mg/mL) (7 days) (14 days) (7 days) Untreated Control 0.0 a (deionized water) 0.0 a* Bialaphos 1.1 5.0 ab 3.7 a Bialaphos 1.4 10.8 b 23.3 b Bialaphos 1.8 62.5 c 66.7 c MBI-005 (thaxtomin A) 0.38 6.7 ab 21.7 b Bialaphos + MBI-005 1.1 0.38 87.5 d 100.0 d 7.7 Bialaphos + MBI-005 1.4 0.38 87.5 d 100.0 d 5.2 Bialaphos + MBI-005 1.8 0.38 87.5 d 100.0 d 1.3 *Treatment means in each column marked with the same letter are not statistically different with LSD at p=0.05 level. 15 19 Example 11 The test species barnyard grass, ragweed, sedge, and broad-leaf mustard were used for the valuation of synergy between MBI-005 and the rice herbicides clomazone, penoxsulam, cyhalofop, fenoxaprop-p-ethyl, bispyribac-sodium, thiobencarb, and propanil. 5 The common turf weeds dandelion and plantain were used in testing for synergy between MBI-005 and 2, 4- or dicamba, two common turf herbicides. Three other herbicides commonly used for field crops, glyphosate, glufosinate, synthetic version of bialaphos, and mesotrione were also tested for synergy with MBI-005 on crabgrass and ragweed. 10 There were 3 replicates per treatment which were sprayed with approximately 2/3 ml per replicate. The treatments were completely randomized and kept in a greenhouse at 25C. The efficacy was rated at 7 and 14 days post treatment. The results are shown in Table 9 to 11. For barnyard grass control, MBI-005 had synergistic effects when combined with clomazone, (penoxsulam, , bispyribac-sodium, thiobencarb, and propanil (Table 9). MBI-005 had additive 15 effects when combined with cyhalofop, and fenoxaprop-p-ethyl (Table 10). MBI-005 showed great synergy with glyphosate for controlling ragweed and also showed synergy with both turf herbicides. The synergistic effect of MBI-005 with glufosinate (synthetic bialaphos) (Table 11) on crabgrass was likely less since the rate of MBI-005 was too low. 20 Table 9. Summary of synergistic or additive effects between MBI-005 (thaxtomin A) and commercial products for rice weed control. The data are means of percentage control of three replicates 14 days post treatment. Active Ingredient Test Product MBI-005 % Control % Control % Control E/Ee Species Rate Rate Product MBI-005 Product + (mg/mL) (mg/mL) MBI-005 clomazone Barnyard 0.513 0.25 37.5 28.3 91.7 1.7 grass Mustard 0.513 0.25 25.0 58.3 70.8 1.0 Sedge 0.501 0.02 0.0 37.5 50.0 1.3 penoxsulam Barnyard 0.051 0.125 25.0 17.5 75.0 2.0 grass Sedge 0.047 0.01 66.7 20.0 87.5 1.2 cyhalofop Mustard 0.051 0.125 11.7 13.3 15.0 0.6 Sedge 1.176 0.01 3.3 20.0 8.3 0.4 fenoxaprop-p-ethyl Barnyard 0.006 0.25 91.7 66.7 87.5 0.9 grass Mustard 0.006 0.125 0.0 45.8 33.3 0.7 Sedge 0.116 0.02 0.0 70.8 66.7 0.9 bispyribac-sodium Barnyard 0.032 0.125 0.0 3.3 62.5 18.8 grass Mustard 0.0216 0.25 53.3 37.5 95.8 1.4 Ragweed 0.0216 0.125 5.0 23.3 50.0 1.8 thiobencarb Barnyard 1.743 0.25 41.7 41.7 79.2 1.2 grass Mustard 1.743 0.125 10.0 54.2 54.2 0.9 Sedge 3.15 0.02 58.3 37.5 70.8 1.0 propanil Barnyard 0.365 0.125 32.5 10.0 79.2 2.0 grass Mustard 0.036 0.25 1.67 58.3 50.0 0.9 21 Table 10. Summary of synergistic or additive effects between MBI-005 (thaxtomin A) and commercial products for turf weed control. The data are means of percentage control of three replicates 14 days post treatment. Active Product Rate MBI-005 % Control % Control % Control Acie Weed Species Prdc ae Rate %Cnrl% otol Product + E/Ee Ingredient (mg/mL) (m/L Product MBI-005 MBI-005 (mg/mL) MBI-005 2, 4-D Dandelion 0.176 0.1 25.0 20.0 91.7 2.3 Plantain 2.340 0.24 50.0 25.0 83.3 1.3 dicamba Dandelion 0.121 0.1 45.8 20.0 75.0 1.3 Plantain 6.025 0.12 50.0 10.0 79.2 1.4 Table 11. Summary of synergistic or additive effects between MBI-005 (thaxtomin A) and commercial products with broad spectrum. The data are means of percentage control of three replicates 14 days post treatment. Active Weed Product Rate MBI-005 % Control % Control % Control Ingredient Species (mg/mL) (m Product MBI-005 PrBduct+ E/Ee (mg/mL) ______MBI-005 ___ glyphosate Crabgrass 0.754 0.125 45.8 28.3 83.3 1.4 Ragweed 2.198 0.125 15.0 6.7 29.2 1.4 glufosinate Crabgrass 0.151 0.125 83.3 20.0 75.0 0.9 (bialaphos) Ragweed 0.194 0.125 22.5 37.5 75.0 1.5 mesotrione Crabgrass 0.24 0.125 62.5 24.2 75.0 1.1 Ragweed 0.96 0.125 25.0 15.0 45.8 1.3 22 Example 12 To further describe the spectrum of pre-emergence activity, tests were conducted in laboratory and field conditions. In laboratory testing, 35 seeds were placed on a ring of blotter paper inside a 3 cm petri dish and supplied with 4 ml of MBI-005 ( 0.1 mg MBI-005/ml). Water was used as a negative 5 control and oryzalin applied as a positive control. Petri dishes were randomly placed in a growth room at 25 'C and 50% RH. Treatments were replicated three times and germinated seeds were counted 7 and 14 days after application; water was added as necessary to maintain moisture levels inside each petri dish. In field testing, field soil containing weed seeds were treated with 38.2 L MBI-005/ha at a 10 spray volume of 280 L/ha using a C02 sprayer with flat fan nozzles. Treatments, including water as the negative control and Gallery as the positive control, were replicated four times and applied twice at a four week interval. Treatments were evaluated visually as % cover and above-ground fresh weights per container were taken. Results in Table 12 indicate broad spectrum activity on both annual grasses and broadleaves, as 15 well as on some perennials. Field results showing control over an eight-day period also suggest soil residual activity. Table 12: Pre-Emergent Effect of MBI-005. An (R) indicates an herbicide resistant population. Test Scale Rating at (lab/ Plant Category Species (common name) Species (scientific name) 0.1 mg/ml field) Grass, annual Crabgrass Digitaria sanguinalis ++++ lab & field Bluegrass Poa annua ++++ lab & field Barnyardgrass Echinochloa crus-gali ++++ lab Late watergrass (R) Echinochloa phyllopogon ++++ lab Canarygrass Phalaris minior ++++ lab Bearded Sprangletop Leptochloafascicularis ++++ lab Bristlegrass/Foxtail Setaria viridis ++++ lab Fall Panicum Panicum dichotomiflorum ++++ lab Grass, perennial Ryegrass Lolium perenne ++++ lab Broadleaf, annual Ragweed Ambrosia artemisifolia ++++ lab Buckhorn plantain Plantago lanceolata ++++ lab Mustard Brassicajuncea ++++ lab Lambsquarters Chenopodium album +++ lab Black nightshade Solanum nigrum ++++ lab Clover Trifolium repens ++++ lab Horseweed (R) Conyza canadensis ++++ lab 23 Palmer pigweed (R) Amaranthus palmerii +++ lab Chickweed Stellaria media ++++ Field Eclipta Eclipta alba ++ Field Bittercress Cardamine hirsuta +++ Field Henbit Lamimum amplexicaule +++ Field Common groundsel Senecio vulgaris ++++ Field Velvetleaf Abutilon theophrasti ++ Field Shepherd's purse Capsella bursa-pastora ++++ Field Hairy galinsoga Galinsoga ciliata +++ Field New Zealand moss Sagina procumbens ++++ Field Marsh watercress Rorippa islandica ++++ Field Flexuous bittercress Cardamineflexuosa ++ Field Common yellow oxalis Oxalis stricta .+ Field Broadleaf, perennial Dandelion Taraxacum oficinale ++++ Field Key-Table 12A Reduction of Germination (%) Rating 0-59 + 60-84 ++ 85-94 95-100 ++++ Example 13. Further Studies on the Post-Emergent Effect of MBI-005 5 To further describe the spectrum of post-emergence activity, tests were conducted in laboratory and field conditions. For laboratory testing, 3-10 plants (depending on the species) at the 1-2 leaf stage plants in 2.5 cm square pots containing Sunshine Mix No. 2 planting media were sprayed at 1mg MBI-005/mL at a rate of 40 gal/A using a cabinet track sprayer. Negative controls were sprayed with water and positive controls with glufosinate. Pots were randomly placed in a growth room at 25 'C 10 and 50% RH, and watered as necessary. Treatments were replicated five times and evaluated at 7 and 14 days for visual % damage, with 0% indicating no damage and 100% indicating plant death. In field testing, field soil containing weeds at the 1-5 leaf stage were treated with 38.2 L MBI-005/ha at a spray volume of 374 L/ha. Treatments, including water as the negative control and WeedBGon or Preen Broadleaf as the positive control, were replicated four times and applied twice at 15 a four week interval. The positive control on Late watergrass, Ricefield Bulrush, Smallflower sedge 24 and Arrowhead was an herbicide containing as active ingredient 2,4-D and an organosilicone surfactant was added to MBI-005. Treatments were assessed for % control and % ground cover. Results, shown in Table 13, indicate good (between 80 and 100% control) post-emergence activity on annual many broadleaves and sedges, and limited post-emergent activity on annual grasses, 5 unless surfactants are added. Post-emergent control of perennials was generally limited except for Oxalis pes-caprae. Table 13: Post-Emergent Effect of MBI-005 Test Scale Plant Species (common Rating at (Lab/Fiel Category name) Species (scientific name) 1 mg/ml d) Grass, annual Late watergrass Echinochloa phyllopogon +++ Field Bluegrass Poa annua ++ Field Sedge, annual Smallflower Cyperus difformis ++++ Field Ricefield bullrush Scirpus mucronatus ++++ Field Sedge, perennial Yellow nutsedge Cyperus esculentus + Lab Broadleaf, annual Redstem filaree Erodium cicutarium ++ Lab Mustard Brassicajuncea ++++ Lab Lambsquarters Chenopodium album ++ Lab Arrowhead Sagittaria montevidensis ++++ Field Velvetleaf Abutilon theophrasti ++ Field Shepherd's purse Capsella bursa-pastoris ++++ Field Hairy galinsoga Galinsoga ciliata +++ Field Nightshade, Eastern Black Solanum ptychanthum ++ Field Common yellow oxalis Oxalis pes-caprae ++++ Field Clover Trifolium hirtum ++ Field Sunflower Helianthus anuus ++ Lab Mallow Malva parviflora + Lab Common chickweed Stellaria media ++ Field Eclipta Eclipta alba ++ Field Hairy bittercress Cardamine hirsuta ++ Field Henbit Lamimum amplexicaule ++++ Field Common groundsel Senecio vulgaris ++++ Field Marsh watercress Rorippa islandica ++ Field 25 Flexuous bittercress Cardamineflexuosa ++ Field Broadleaf, Lab perennial Dandelion Taraxacum oficinale ++ Bindweed Convolvulus arvensis + Lab Bermuda buttercup Oxalis pes-caprae ++++ Field Key-Table 13A Post-Emergence Rating % control + 0-50 ++ 51-80 +++ 81-90 ++++_ _91-100 Example 14. Synergistic Effect of MIBI-005 +Manuka Oil on the Emergence of Crabgrass 5 Synergistic effects of MBI-005 and Manuka oil (containing leptospermone and other triketones) were evaluated on crabgrass seed germination in a laboratory experiment. Thirty-five seeds were placed on a ring of blotter paper inside a 3 cm petri dish, covered with 10 cm 3 of inert baked clay particle media and supplied with 7 ml of 0.035 mg/ml MBI-005, a Manuka oil concentration, or a combination of MBI-005 and Manuka oil (Figure 2). Water was used as a negative control. Petri dishes 10 were randomly placed in a growth room at 25 'C and 50% RH. Treatments were replicated three times and germinated seeds were counted 7 days after application; water was added as necessary to maintain moisture levels inside each petri dish. Synergy occurred between MBI-005 and Manuka oil at 0.003%v/v. Mild synergy was seen between MBI-005 and Manuka oil at 0.01 %v/v. Synergy was calculated as the ratio of observed (E) to 15 expected (E/Ee) reduction in germination using Colby's formula. Results are shown in Figure 2 Example 15. 005 + m-Tyrosine Pre-Emergent Synergies in Crabgrass Synergistic effects of MI-005 and m-Tyrosine were evaluated on crabgrass seed germination in a laboratory experiment. Forty-five seeds were placed on a ring of blotter paper inside a 3 cm petri 20 dish, covered with 10 cm 3 of inert baked clay particle media and supplied with 7 ml of 0.035 mg/ml MBI-005, a m-Tyrosine concentration, or a combination of MBI-005 and m-Tyrosine (Table 14). Water was used as a negative control. Petri dishes were randomly placed in a growth room at 25 'C and 50% RH. Treatments were replicated three times and germinated seeds were counted 7 days after application; water was added as necessary to maintain moisture levels inside each petri dish. 26 Synergy occurred between MBI-005 and m-Tyrosine at 0.44 mg/mL but not for MBI-005 and m-Tyrosine at 22 mg/mL. Synergy was calculated as the ratio of observed (E) to expected (E/Ee) reduction in germination using Colby's formula. 5 Table 14: 005 + m-Tyrosine Pre-Emergent Synergies in Crabgrass (7 DAT) Treatment Description AVG No. SE E (% Ee E/Ee germinated controlled (expected compared control) to UTC) 1 Untreated control 44.3 .9 0.0 -- 2 .22 mg/mL M-tyrosine 40.7 2.6 8.3 -- 3 .44 mg/mL M-tyrosine 44.0 3.8 0.8 -- 4 MBI-005 at 38.0 4.0 14.3 -- 0.0035mg/mL 5 MBI-005 at 0.0035 35.0 2.1 21.1 21.4 1.0 mg/mL+.22mg/mL M-tyrosine 6 MBI-005 at 0.0035 26.0 2.1 41.4 14.9 2.8 mg/mL+.44ml/mL M-tyrosine Example 16: MBI-005 + Chelated Fe Post-Emergent Synergistic Effect in Crabgrass Post-emergent synergistic effects of MBI-005 and Chelated iron were evaluated on crabgrass at the 1-2 leaf stage in a laboratory experiment. Ten seedlings in 2.5 cm square pots containing plant 10 growth mix were sprayed with two suboptimal rates of MBI-005, 14.49 mg/mL of Chelated Fe, or a combination thereof, at a volume of 40 gal/A using a cabinet track sprayer. Negative controls were sprayed with water. Pots were randomly placed in a growth room at 25 'C and 50% RH, and watered as necessary. Treatments were replicated five times and evaluated at 7 and 15 days for visual % damage, with 0% indicating no damage and 100% indicating plant death. 15 A substantial synergistic effect occurred between MBI-005 and chelated Fe, at both concentrations of MBI-005. Synergy was calculated as the ratio of observed (E) to expected (E/Ee) percent control using Colby's formula. Table 15: MBI-005 + Chelated Fe Post-Emergent Synergies in Crabgrass (15 DAT) Crabgrass (15 DAT) Description AVG E STD DEV Ee E/Ee 27 Untreated Control 0.0 0.0 -- - 12.5% MBI-005 1.3 2.5 -- - (0. 125mg/mL) 25% MBI-005 (0.25mg/mL) 1.3 2.5 -- - 95% Chelated Fe Field Rate 6.3 2.5 -- - (14.49 mg/ml) 12.5% MBI-005 25.0 0.0 7.4 3.4 (0.125mg/rmL)/ 95% Chelated Fe 25% MBI-005 (.25mg/mL)/ 25.0 0.0 7.4 3.4 95% Chelated Fe Example 17. MBI-005 + Atrazine Post-Emergent Synergies in Crabgrass (7 and 14 DAT) Post-emergent synergistic effects of MBI-005 and Atrazine were evaluated on crabgrass at the 1-2 leaf stage in a laboratory experiment. Ten seedlings in 2.5 cm square pots containing plant growth 5 mix were sprayed with two suboptimal rates of MBI-005, and 35% of the atrazine label rate (0.3 gallons /A), or a combination thereof, at a volume of 40 gal/A using a cabinet track sprayer. Negative controls were sprayed with water. Pots were randomly placed in a growth room at 25 'C and 50% RH, and watered as necessary. Treatments were replicated five times and evaluated at 7 and 14 days for visual % damage, with 0% indicating no damage and 100% indicating plant death. 10 A substantial synergistic effect occurred between MBI-005 and atrazine, at either concentration of MBI-005 at both 7 and 14 days after treatment. Synergy was calculated as the ratio of observed (E) to expected (E/Ee) percent control using Colby's formula. Table 16: MBI-005 + Atrazine Post-Emergent Synergies in Crabgrass (7 and 14 DAT) 7DAT 14DAT Crabgrass Crabgrass Description AVG E STD DEV Ee AVG/E STD DEV E/Ee Untreated Control 0.0 0.0 -- 0.0 0.0 - 12.5% MBI-005 Label 10.0 0.0 -- 10.0 0.0 - Rate (0.125mg/nL) 25% MBI-005 Label 11.9 3.8 -- 11.9 3.8 - Rate(0.25mg/mL) 35% Atrazine Label Rate 11.9 3.8 -- 8.8 2.5 - 28 12.5% MBI-005 /35% 65.6 12.0 3.2 78.1 12.0 4.4 Atrazine 25% MBI-005 /35% 75.0 0.0 3.4 90.6 6.3 4.6 Atrazine Example 18. Post-Emergent Effect of MBI-005 + Rice Herbicides in Barnyard Grass Post-emergent synergistic effects of MBI-005 and three common rice herbicides were evaluated on barnyard grass at the 1-2 leaf stage in a laboratory experiment. Ten seedlings in 2.5 cm 5 square pots containing plant growth mix were sprayed to full coverage using a hand sprayer. Negative controls were sprayed with water. Pots were randomly placed in a growth room at 25 'C and 50% RH, and watered as necessary. Treatments were replicated three times and evaluated at 7 and 14 days for visual % damage, with 0% indicating no damage and 100% indicating plant death. Synergistic effect were noted between MBI-005 and all three rice herbicides, 14 days after 10 treatment. Synergy was calculated as the ratio of observed (E) to expected (E/Ee) percent control using Colby's formula. Table 17. Post-Emergent Effect of MBI-005 + Rice Herbicides in Barnyard Grass Chemical %v/v of % of the % control % control % control Synergy Active Ingredient label rate label rate chemical MBI-005 MBI-005 coeffici (AI) (AI) MBI 005 Al + ent chemical Al Clomazone 13.3 25% 37.50 28.30 91.66 1.66 Penoxsulam 13.0 12.5% 25.0 17.5 75.0 1.97 Bispyribac-sodium 13.3 25% 6.7 41.7 83.3 1.83 15 Example 19. Post-Emergent Effect of MBI-005 + Rice Herbicides in Smallflower Umbrella Sedge Post-emergent synergistic effects of MBI-005 and five common rice herbicides were evaluated on small flower umbrella sedge at the 0.5-1 leaf stage in a laboratory experiment. Twenty seedlings in 2.5 cm square pots containing plant growth mix were sprayed to full coverage using a hand sprayer. 20 Negative controls were sprayed with water. Pots were randomly placed in a growth room at 25 'C and 50% RH, and watered as necessary. Treatments were replicated three times and evaluated at 7 and 14 days for visual % damage, with 0% indicating no damage and 100% indicating plant death. 29 Synergistic effects were noted 14 days after treatment between MBI-005 and all three rice herbicides, with clomazone showing the greatest synergism with MBI-005. Synergy was calculated as the ratio of observed (E) to expected (E/Ee) percent control using Colby's formula. Table 18. Post-Emergent Effect of MBI-005 + Rice Herbicides in Smallflower Umbrella Sedge 5 Chemical Active %v/v of % of the % control % control % control Synergy Ingredient label rate label rate Al MBI-005 MBI-005 coefficient (AI) Al MBI 005 + chemical Al Clomazone 13% 2.0% 0.0 20.0 70.8 3.54 Penoxsulam 13% 2.0% 33.3 20.0 66.7 1.43 Bispyribac-sodium 13.3% 1 0.5% 37.5 3.3 62.5 1.57 Thiobencarb 25% 1 2.0% 1 41.7 20.0 83.3 1.56 Propanil .5% 2.0% 1 62.5 20.0 83.3 1.19 Example 20. Post-Emergent Effect of MBI-005 + Propanil on Barnyard Grass Post-emergent synergistic effects of MBI-005 and the common rice herbicide Propanil were evaluated on barnyard grass at the 1-2 leaf stage in a laboratory experiment. Ten seedlings in 2.5 cm 10 square pots containing plant growth mix planting media were sprayed with 12.5% or 25% of the label rate of MBI-005, 25% of the propanil label rate, or a combination thereof, to full coverage using a hand sprayer. Negative controls were sprayed with water. Pots were randomly placed in a growth room at 25 'C and 50% RH, and watered as necessary. Treatments were replicated three times and evaluated at 7 and 14 days for visual % damage, with 0% indicating no damage and 100% indicating plant death. 15 Synergistic effects were noted between both rates of MBI-005 and propnail, 14 days after treatment. Synergy was calculated as the ratio of observed (E) to expected (E/Ee) percent control using Colby's formula. 30 Table 19: Post-Emergent Effect of MBI-005 + Propanil on Barnyard Grass Treatment Description Observed Average% Ee E/Ee Efficacy (E) UTC (No spray) 0.0 12.5% MBI-005 10.0 25% MBI-005 20.0 25% Propanil 32.5 250% Propanil + 79.2 39.25 2.02 12.5% MBI-005 25% Propanil + 25% 75.0 46.00 1.63 MBI-005 Example 21. Post-Emergent Effect of MBI-005 + Thiobencarb on Smallflower umbrella sedge 5 Post-emergent synergistic effects of MBI-005 and the common rice herbicide thiobencarb are evaluated on Smallflower umbrella sedge at the 0.5-1 leaf stage in a laboratory experiment. Twenty seedlings in 2.5 cm square pots containing plant growth mix were sprayed with 0.5%, 1% or 2% of the label rate of MBI-005, 25% of the thiobencarb label rate, or a combination thereof, to full coverage using a hand sprayer. Negative controls were sprayed with water. Pots were randomly placed in a 10 growth room at 25 'C and 50% RH, and watered as necessary. Treatments were replicated three times and evaluated at 7 and 14 days for visual % damage, with 0% indicating no damage and 100% indicating plant death. Synergistic effects were observed for three of the four thiobencarb+MBI-005 combinations, 14 days after treatment. Synergy was calculated as the ratio of observed (E) to expected (E/Ee) percent 15 control using Colby's formula. 31 Table 20. 005 + Thiobencarb Post-Emergent Synergies on Smallflower sedge Treatment Description Observed Average % Ee E/Ee Efficacy (E) UTC (No spray) 0.0 .5% MBI-005 3.3 2% MBI-005 20. 25% Thiobencarb 41.7 25% Thiobencarb 62.5 43.61 1.43 + .5% MBI-005 25% Thiobencarb + 83.3 53.33 1.56 2% MBI-005 UTC (No Spray) 0.0 1% MBI-005 10.0 2% MBI-005 79.2 15% Thiobencarb 25.0 15% Thiobencarb + 66.7 32.50 2.05 1 % MBI-005 15% Thiobencarb + 79.2 84.38 0.94 2% MBI-005 Although this invention has been described with reference to specific embodiments, the details 5 thereof are not to be construed as limiting, as it is obvious that one can use various equivalents, changes and modifications and still be within the scope of the present invention. Various references are cited throughout this specification, each of which is incorporated herein by reference in its entirety. 10 In the claims which follow and in the preceding description of the invention, except where the context requires otherwise due to express language or necessary implication, the word "comprise" or variations such as "comprises" or "comprising" is used in an inclusive sense, i.e. to specify the presence of the stated feature but not to preclude the presence or addition of further features in various embodiments of the invention. 15 It is to be understood that, if any prior art publication is referred to herein, such reference does not constitute an admission that the publication forms a part of the common general knowledge in the art, in Australia or any other country. 32 Cited references: Beausajour, J., C. Goyer, et al. (1999). "Production of thaxtomin A by Streptomyces scabies strains in 5 plant extract containing media." Can J Microbiol 45: 764-768. Duke, S. 0., S. R. Baerson, et al. (2003). "United States Department of Agriculture-Agricultural Research Service research on natural products for pest management." Pest Manag Sci 59: 708-717. 10 Duke, S. 0., F. E. Dayan, et al. (2000). "Natural products as sources of herbicides: current status and future trends." Weed Research 40: 99-111. Fry, B. A. and R. Loria (2002). "Thaxtomin A: Evidence for a plant cell wall target." Physiological and Molecular Plant Pathology 60: 1-8. 15 Gerwick, B. C., P. R. Graupner, et al. (2005). Methylidene mevalonates and their use as herbicides. U. p. 7393812: 16. Healy, F. G., M. J. Wach, et al. (2000). "The txtAB genes of the plant pathogen Streptomyces 20 acidiscabies encode a peptidesynthetase required for phytotoxin thaxtomin A prodcution and pathogenicity." Molecular Microbiology 38: 794-804. Hiltunen, L. H., I. Laakso, et al. (2006). "Influence of thaxtomins in different combinations and concentrations on growth of micropropagated potato shoot cultures." J Agric Food Chem 54: 25 3372-3379. Hoagland, R. E. (2001). "Microbial allelochemicals and pathogens as bioherbicidal agents." Weed Technology 15: 835-857. 30 Kang, Y., S. Semones, et al. (2008). Methods of controlling algae with thaxtomin and thaxtomin compositions. USA, Novozymes Biologicals, Inc. 33 King, R. R., C. H. Lawrence, et al. (1992). "Chemistry of phytotoxins associated with Streptomyces scabies, the causal organism of potato common scab." J. Agric. Food Chem 40: 834-837. King, R. R., C. H. Lawrence, et al. (1989). "Isolation and characterization of phytotoxin associated 5 with Streptomyces scabies." Journal of the Chemical Society, Chemical Communications 13: 849-850. King, R. R., C. H. Lawrence, et al. (2003). "More chemistry of the thaxtomin phytotoxins." Phytochemistry 64: 1091-1096. 10 King, R. R., C. H. Lawrence, et al. (2001). "Herbicidal properties of the thaxtomin group of phytotoxins." J Agric Food Chem 49: 2298-2301. Loria, R., R. A. Bukhalid, et al. (1995). "Differential production of thaxtomins by pathogenic Streptomyces species in vitro " Phytopathology 85: 537-541. 15 20 34
Claims (11)
1. A synergistic herbicidal composition comprising at least two herbicides wherein a first herbicide is thaxtomin and a second herbicide comprises Atrazine.
2. The composition according to claim 1, wherein said thaxtomin has the following composition: NO2 O R R N /N. N H R1 R5 )'R2 O R4 wherein R 1 is methyl or H, R 2 is hydroxy or H, R 3 is methyl or H, R 4 is hydroxy or H, R 5 is hydroxy or H, R 6 is hydroxy or H, and combinations thereof.
3. A method for modulating growth of monocotyledonous, eudicotyledonous, dicotyledonous and sedge weeds, and aquatic weeds selected from the group consisting of Ammania sp., Alisma plantago-aquatica, Cyperus sp., Leptochloa sp. comprising applying to said weeds or soil an amount of the composition of claim 1 or 2.
4. The method according to claim 3, wherein the weed is selected from the group consisting of Chenopodium sp, Abutilon sp., Helianthus sp., Ambrosia sp., Amaranthus sp., Convolvulus sp., Brassica sp., Taraxacum sp., Solanum sp., Malva sp.,, Setaria sp. Bromus sp., Poa sp., Lolium sp, Festuca sp, Echinochloa sp., Cyperus sp., Scirpus sp., Erodium sp., Sagittaria sp., Capsella sp., Galinsoga sp., Oxalis sp., Trifolium sp., Stellaria sp., Eclipta sp., Cardamine sp., Lamimum sp., Senecio sp., and Rorippa sp.
5. The method according to claim 4, wherein the weed is selected from the group consisting of Echinochloa phyllopogon, Cyperus difformis, Scirpus mucronatus, Cyperus esculentus, Erodium cicutarium, Brassica juncea, Chenopodium album, Sagittaria 35 montevidensis, Abutilon theophrasti, Capsella bursa-pastoris, Galinsoga ciliata, Solanum ptychanthum, Oxalis pes-caprae, Trifolium hirtum, Helianthus anuus, Malva parviflora, Stellaria media, Convolvulus arvensis, Eclipta alba, Cardamine hirsute, Lamimum Amplexicaule, Senecio vulgaris, Rorippa islandica, Cardamineflexuosa, and Taraxacum oficinale.
6. The method according to claim 4, wherein said monocotyledonous, eudicotyledonous, dicotyledonous and sedge weeds are modulated in a cereal growth system.
7. The method according to claim 4, wherein the cereal growth system is a rice growth system.
8. The method according to any one of claims 3-7 wherein said composition is applied prior to emergence of said weeds.
9. The method according to any one of claims 3-7, wherein said composition is applied after emergence of said weeds.
10. A composition according to claim 1, substantially as herein described or exemplified.
11. A method according to claim 3, substantially as herein described or exemplified. 36
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