CN1294817C - Application of rhizoma anemarrhenae extract as bactericide and bactericide containing rhizoma anemarrhenae extract - Google Patents
Application of rhizoma anemarrhenae extract as bactericide and bactericide containing rhizoma anemarrhenae extract Download PDFInfo
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- CN1294817C CN1294817C CNB2004100377790A CN200410037779A CN1294817C CN 1294817 C CN1294817 C CN 1294817C CN B2004100377790 A CNB2004100377790 A CN B2004100377790A CN 200410037779 A CN200410037779 A CN 200410037779A CN 1294817 C CN1294817 C CN 1294817C
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- bacterium
- rhizoma anemarrhenae
- bactericide
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- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The invention relates to application of rhizoma anemarrhenae extract as a bactericide and the bactericide containing the rhizoma anemarrhenae extract. The rhizoma anemarrhenae extract mainly contains at least one of the following rhizoma anemarrhenae extract compounds: mangiferin, isomangiferin, timosaponin, sarsasapogenin, and rhizoma anemarrhenae total polysaccharide. The rhizoma anemarrhenae extract and the agricultural bactericide containing the rhizoma anemarrhenae extract have good control effect on various crop diseases, are environment-friendly, and have the characteristics of low residue, high control effect, wide bactericidal spectrum and the like.
Description
[technical field]
The present invention relates to the application of anemarrhena asphodefoides extract, and relate to and contain the disinfectant use in agriculture of anemarrhena asphodefoides extract as active component as disinfectant use in agriculture.
[background technology]
Crops all need to use a large amount of agricultural chemicals for this reason and carry out the extermination of disease and insect pest to retrieve crop yield loss because damage by disease and insect causes crop yield loss huge every year.Damage by disease and insect is more and more heavier to the harm on the crops in recent years, and, cause extermination of disease and insect pest effect to reduce year by year because the agricultural chemicals abuse is that the crop cause of disease has produced more and more serious resistance to agricultural chemicals, simultaneously because formulation rate is excessive, environment is caused to a certain degree pollution.The pesticide species that therefore, still just need have better cause of disease control effect.
Effectively controlling plant cause of disease growing plants extract is applied to the agricultural disease control, perhaps it and other Fungicidal compounds are mixed, thereby reduce residue of pesticide to greatest extent, safer and more effective agrochemicals product is provided, be that the researcher pursues, but existing bactericide all can not be satisfactory at bactericidal activity and aspect such as residual always.
The wind-weed (Anemarrhena asphodeloides Bunge) is a Liliaceae Anemarrhena plant, is herbaceos perennial, and main product is in Hebei.Rhizome is horizontal to be walked, and slightly is oblate, above remaining yellowish-brown phyllopodium fiber, following adnation has most fibrous roots.Phyllopodium gives birth to, and line style, matter are hard slightly, long 20~70cm, wide 3~6mm.High 40~the 60cm of scape, scattered flakey bractlet, top is gradually little; Long 20~the 40cm of raceme spends 2~6 to be bunch, and is scattered on rhachis, every bunch of colored tool 1 bract; Tepal 6, yellow or violet have 3~5 arteries and veins; Stamen 3, with interior wheel tepal to life; Ovary is upper, Room 3.The long oval of capsule, tool six vertical ribs.Seed black, prismatic, two ends point.5~June of florescence, really 8~September of phase.The wind-weed is liked gentle humid climate, and adaptability is strong, and is cold-resistant, with fertile loose well-drained loam plantation for well.
Wind-weed rhizome is a kind of traditional Chinese medicine, cures mainly exogenous high fever, lung-heat type cough, deficiency of Yin osteopyrexia and fever, seminal emission night sweat, the deficiency of Yin and quenches one's thirst etc.Its decoction is inhibited to pathogenetic bacterias such as typhoid bacillus, paratyphosum Bacterium, shigella dysenteriae, Escherichia coli, proteus, cholera bacilli and staphylococcuses.10 kinds of psoriasis fungies such as trichophyton there is in various degree inhibitory action.Existing document discloses the extraction and the traditional Chinese medicine purposes of the wind-weed, for example CN1370537 discloses new medical use of total steroidal saponin in the Chinese medicine wind-weed and preparation method thereof, CN1451384 and discloses purposes, the CN1434053 that anemarrhena total saponin is used to prepare control cerebral apoplexy medicine and disclose anemarrhena asphodefoides extract and its production and use, above-mentioned document is disclosed to be the application of anemarrhena asphodefoides extract aspect medical, and the wind-weed yet there are no report for the inhibitory action of plant pathogenic fungi, bacterium and to the research of the antivirus action of plant pathogeny virus.
The inventor screens a series of extraction compounds that can be used for the agricultural disease control from a large amount of plants, find that anemarrhena asphodefoides extract has good agricultural disease control efficiency, and confirmed by a large amount of tests of pesticide effectiveness.The result confirms that bactericide of the present invention has good preventive and therapeutic effect to many corps diseases, and environmentally friendly, has residual low, characteristics such as preventive effect is high, fungicidal spectrum is wide, so finished the present invention.
[summary of the invention]
The technical problem that is solved
The purpose of this invention is to provide the application of anemarrhena asphodefoides extract as disinfectant use in agriculture.
Another object of the present invention provides a kind of wind-weed that contains and extracts the disinfectant use in agriculture of compound as active component, and it has broad fungicidal spectrum and excellent synergy control efficiency.
A further object of the present invention provides the application of described bactericidal agent for preventing and treating corps diseases.
Technical scheme
The invention provides the application of anemarrhena asphodefoides extract as disinfectant use in agriculture control corps diseases.
In the present invention, anemarrhena asphodefoides extract is one or more compounds that are selected from mangiferin, isomangiferin, timosaponin, chinaroot greenbrier sapogenin or wind-weed total polysaccharides.The concrete structure of above-mentioned wind-weed extraction compound can be referring to for example " Chinese pharmacognosy " (Xu Guojun chief editor, Chinese Medicine science and technology publishing house,, 614-618 page or leaf in 1996).Mangiferin for example preferably.Anemarrhena asphodefoides extract can be the mixture of said extracted compound, also monomer whose.Usually they can be buied from the market, and for example mangiferin monomer, isomangiferin monomer, timosaponin monomer, chinaroot greenbrier sapogenin monomer or wind-weed total polysaccharides monomer all can be buied from DELTA (glucoside that tower) natural organic-compound information centre.
In addition, anemarrhena asphodefoides extract also can adopt and well known to a person skilled in the art that extracting method directly extracts from the wind-weed.For example wind-weed rhizome, blade and the seed of drying are pulverized, sieved; Water or ethanol under refluxad extract; Use the method for vacuum concentration then, anemarrhena asphodefoides extract is concentrated into former wind-weed crushed material etc. heavy, obtain anemarrhena asphodefoides extract.
Anemarrhena asphodefoides extract can be used for preventing and treating the multiple kinds of crops disease, for example can prevent and treat the corps diseases that is caused by following cause of disease: phytophthora infestans, tomato late blight bacterium, cladosporium leaf and fruit mould of tomato bacterium, verticillium dahliae, root rotof flax bacterium, fusarium graminearum, Exserohilum turcicum, ring rot of apple bacterium, botrytis cinerea, powdery mildew of cucumber bacterium and bacterium of downy mildew of cucumber.The corps diseases that preferred control is caused by following cause of disease: phytophthora infestans, tomato late blight bacterium, botrytis cinerea, cladosporium leaf and fruit mould of tomato bacterium, verticillium dahliae, root rotof flax bacterium, fusarium graminearum and ring rot of apple bacterium.
The present invention also provides a kind of disinfectant use in agriculture of synergy, and it contains anemarrhena asphodefoides extract as active component, and the content of described anemarrhena asphodefoides extract is 0.01-90 weight %, preferably 0.1-60 weight %, more preferably 1-30 weight %.
In composition of the present invention, anemarrhena asphodefoides extract mainly contains one or more compounds that is selected from mangiferin, isomangiferin, timosaponin, chinaroot greenbrier sapogenin, wind-weed total polysaccharides.Preferably for example mangiferin, wind-weed total polysaccharides.Anemarrhena asphodefoides extract can be the mixture of said extracted compound, also monomer whose.
Anemarrhena asphodefoides extract and contain anemarrhena asphodefoides extract disinfectant use in agriculture of the present invention and can convert conventional formulation to is as missible oil, wetting powder, granula, soluble powder, water dispersible granules, oil-suspending agent, aqueous suspension agent, aqueous emulsion, microemulsion, emulsion, pulvis, dust base, effervescent agent, paste and water surface leafing agent formulation.Preferred missible oil, wetting powder, oil-suspending agent or the aqueous suspension agent of adopting.
Wherein, each weight percentages of components of missible oil is preferably:
Anemarrhena asphodefoides extract 0.1-60%
Emulsifier 1-30%
Dispersant 0.1-20%
Solvent 1-60%
Each weight percentages of components of wetting powder is preferably:
Anemarrhena asphodefoides extract 0.1-40%
Wetting agent 1-10%
Dispersant 1-5%
Filler 10-90%
Each weight percentages of components of oil-suspending agent is preferably:
Anemarrhena asphodefoides extract 0.1-40%
Surfactant 1-80%
Solvent 1-30%
Emulsifier 1-30%
Each weight percentages of components of aqueous suspension agent is preferably:
Anemarrhena asphodefoides extract 0.1-40%
Solvent 1-50%
Water 30-50%
Dispersant 1-10%
These preparations can prepare in a known manner, for example, if desired, can adopt emulsifier and dispersant to fill by reactive compound is mixed with solvent and/or carrier, when using water as thinner, also can adopt other organic solvent to make cosolvent simultaneously.
Wherein, solvent can be aromatic compounds (for example dimethylbenzene), chloro aromatic compounds (for example chlorobenzene), paraffin (for example petroleum cuts), alcohols (for example methyl alcohol, butanols), ketone (for example cyclohexanone), amine (for example monoethanolamine, dimethyl formamide) and water; Carrier can be natural mineral matter (for example kaolin, alumina, talcum, chalk) that grinds and the synthetic mineral matter (for example silicic acid of high dispersive, silicate) that grinds; Emulsifier can be nonionic and anion emulsifier (for example polyoxyethylene aliphatic alcohol ether, alkylsulfonate and arylsulphonate); Dispersant can be lignin sulfite waste liquor or methylcellulose.
The surfactant that is fit to can be an aromatic sulfonic acid (lignosulphonic acid for example, phenolsulfonic acid, naphthalene sulfonic acids and dibutyl naphthalene sulfonic acids) and the alkali metal of fatty acid, alkaline earth metal and ammonium salt, alkylsulfonate and alkylaryl sulfonates, alkyl sulfate, lauryl ether sulfuric acid and aliphatic alcohol sulfate, and Sulfated 16-, 17-and the salt of octadecanol and fatty alcohol ether, sulfonated naphthalene and its derivative and formaldehyde condensation product, the condensation product of naphthalene or naphthalene sulfonic acids and phenol and formaldehyde, polyoxyethylene octylphenol ether, the iso-octyl of ethyoxyl alkanisation-, octyl group-or nonyl phenol, alkylphenol or tributyl phenyl polyglycol ether, alkyl aryl polyether alcohol, different three decyl alcohol, the fatty alcohol ethylene oxide condensate, ethoxylated castor oil, polyoxyethylene-or the polyoxypropylene alkyl ether, laruyl alcohol polyglycol ether acetic acid esters, sorbitan ester, lignin sulfite waste liquor or methylcellulose.
Can adopt and mix or Ginding process mixes active substance and solid carrier, produce pulvis, spread fertilizer over the fields pulvis, effervescent agent, solid-state water surface leafing agent.
Can be by reactive compound be adhered on the solid carrier, prepare granule (for example apply, dipping or homogeneous particle agent).
Wherein, solid carrier can be that ore soil is as silica gel, silicic acid, silicate, talcum, kaolin, lime stone, lime, chalk, bole, loess, potter's clay, dolomite, diatomite, calcium sulphate and magnesium sulfate, magnesia; The synthetic material, the chemical fertilizer that grind are as ammonium sulfate, ammonium phosphate, ammonium nitrate, urea and plant product such as flour, bark powder, wood powder and shuck powder, cellulose powder and other solid carrier.Activity compound concentration in direct useful formulations can change in wide relatively scope.
Above-mentioned various administration forms depend primarily on specific occupation mode and service condition; Under any circumstance, all must guarantee their dispersion as far as possible, discrete particles trickle and even.
Moisture administration form can be by adding water, for example by missible oil, dispersion liquid, paste, wetting powder, effervescent agent or water dispersible granule preparation.When preparation emulsion, paste, oily dispersion liquid or liquid water surface leafing agent,, material is homogenized in water or be dissolved in oil or the solvent by adding wetting agent, adhesive, dispersant or emulsifier.And, also can prepare by active substance, wetting agent, adhesive, dispersant or emulsifier and possible solvent or the oily concentrate of forming, this concentrate is suitable for dilute with water.
Usually, this disinfectant use in agriculture can contain 0.01 to 90% anemarrhena asphodefoides extract active component by weight, and usually according to the difference of preparation type, preferably contains 0.1 to 60% anemarrhena asphodefoides extract active component by weight.
Present composition application dosage, the difference according to factors such as different crops, time of application, weather conditions is generally 50-5000g a.i./ha, is preferably 400-2000g a.i./ha.The general foliage applying that adopts, for example foliar spray is handled.Also can do other and handle as seed dressing, filling root etc., in this case, can adjust application dosage as required.For example when soil treatment was prevented and treated, application dosage was in the scope of 1000-2500g a.i./ha.
Bactericidal composition of the present invention can be used for preventing and treating the multiple kinds of crops disease, for example potato late blight, tomato late blight, graw mold of tomato, cladosporium leaf and fruit mould of tomato, cotton verticillium wilt, root rotof flax, wheat scab and ring rot of apple.Particularly particularly remarkable for the preventive and therapeutic effect of potato late blight.
Beneficial effect
Bactericide of the present invention has been compared following advantage than prior art:
1, nontoxic, noresidue is to non-target organism safety.Product of the present invention is a public nuisance-free agricultural chemicals.
2, fungicidal spectrum is wide, potato late blight, tomato late blight, cladosporium leaf and fruit mould of tomato, cotton verticillium wilt, root rotof flax, wheat scab, the corn northern leaf blight, ring rot of apple, graw mold of tomato, powdery mildew of cucumber and cucumber downy mildew are had the better prevention effect, and preventive effect all reaches more than 50%.
3, environmentally safe.Active substance in the wind-weed bactericide derives from nature, has formed its intrinsic participation energy and material cyclic metabolic pathway in evolution of long period of time, is administered in plant or the environment, can not cause residual or biological concentration.
4, product of the present invention is different with conventional pesticide to the mechanism of action of pathogen, is difficult for causing the pesticide resistance of pathogen, also can delay the pesticide resistance of pathogen to conventional pesticide.
[description of drawings]
Fig. 1 is the inhibitory action figure of anemarrhena asphodefoides extract Phytophthora infestans mycelial growth.
Fig. 2 is the inhibitory action figure that anemarrhena asphodefoides extract Phytophthora infestans zoospore is sprouted.
[specific embodiment]
The present invention describes with the following example, but does not limit the present invention.
The mangiferin monomer that uses among the following embodiment, isomangiferin monomer, timosaponin monomer, chinaroot greenbrier sapogenin monomer and wind-weed total polysaccharides monomer are all buied from DELTA (glucoside that tower) natural organic-compound information centre.
Example of formulations
Example of formulations 1:2% missible oil
Raw material consumption (weight portion)
Mangiferin 2
Sodium sulfate of polyethenoxy ether of fatty alcohol 10
Chloroform 83
Take by weighing mangiferin and be dissolved in the solvent chloroform, and then add sodium sulfate of polyethenoxy ether of fatty alcohol (production of Dezhou dust forensic chemistry Co., Ltd) and azone (production of Hubei Southern Star chemical general factory), stir, promptly make described 2% missible oil.
Example of formulations 2:30% missible oil
Raw material consumption (weight portion)
Mangiferin 15
Isomangiferin 15
Farming breast 2,201 10
YZ-901 15
Dimethylbenzene 45
Take by weighing mangiferin and isomangiferin is dissolved in the dimethylbenzene, and then add farming breast 2201 (productions of moral bodyguard chemical industry Co., Ltd) and YZ-901 (production of Guangdong peasant's Fine Chemical Works), stir, promptly make described 30% missible oil.
Example of formulations 3:60% missible oil
Raw material consumption (weight portion)
Mangiferin 20
Isomangiferin 10
Timosaponin 10
Chinaroot greenbrier sapogenin 10
Wind-weed total polysaccharides 10
Farming breast 2,201 10
Methyl alcohol 25
Taking by weighing mangiferin, isomangiferin, timosaponin, chinaroot greenbrier sapogenin and wind-weed total polysaccharides is dissolved in the methyl alcohol, and then adding farming breast 2201 (productions of moral bodyguard chemical industry Co., Ltd) and penetrant t (production of Anyang dicyclo auxiliary agent Co., Ltd), stir, promptly make described 60% missible oil.
Example of formulations 4:10% wetting powder
Raw material consumption (weight portion)
Precipitated calcium carbonate 80
Earlier with precipitated calcium carbonate precomminution, then it is fully mixed with above-mentioned timosaponin, chinaroot greenbrier sapogenin, white carbon (production of chemical industry Co., Ltd of Shanghai Ih Ju League) and neopelex (Shanghai is contained many chemical companies and produced), adopt comminution by gas stream processing again, promptly make described 10% wetting powder that gets.
Example of formulations 5:20% oil-suspending agent
Raw material consumption (weight portion)
Mangiferin 10
Wind-weed total polysaccharides 5
Phthalic acid dimethyl ester 20
Sodium sulfate of polyethenoxy ether of fatty alcohol 10
Mineral oil 50
Take by weighing mangiferin, timosaponin and wind-weed total polysaccharides, add mineral oil and phthalic acid dimethyl ester (Bailong Chemical Co., Ltd., Shijiazhuang's production) and sodium sulfate of polyethenoxy ether of fatty alcohol (production of Dezhou dust forensic chemistry Co., Ltd), through ball milling, sanded treatment, promptly make described 20% oily suspension emulsion.
Example of formulations 6:40% aqueous suspension agent
Raw material consumption (weight portion)
Isomangiferin 30
Wind-weed total polysaccharides 10
Ethylene glycol 10
Sodium sulfate of polyethenoxy ether of fatty alcohol 10
Water 40
Take by weighing isomangiferin and wind-weed total polysaccharides, add entry and ethylene glycol and sodium sulfate of polyethenoxy ether of fatty alcohol (production of Dezhou dust forensic chemistry Co., Ltd),, promptly make described 40% water suspension emulsion through ball milling, sanded treatment.
Biological Examples
Biological Examples 1: the inhibition active determination test of anemarrhena asphodefoides extract Phytophthora infestans
The inhibition activity of anemarrhena asphodefoides extract Phytophthora infestans has been tested in this experiment under isolated condition, experimental technique and as follows with experimental result:
1, for the examination bacterial classification: phytophthora infestans (Phytophthora infestans).
2, test method: the inhibition activity that above-mentioned anemarrhena asphodefoides extract is adopted growth rate method and zoospore sprouting method test Phytophthora infestans.
Mycelial growth inhibition rate=(blank colony diameter-processing colony diameter)/blank colony diameter * 100%
Zoospore is sprouted inhibiting rate=(contrast zoospore germination rate-processing zoospore germination rate)/contrast zoospore germination rate * 100%
3, result of the test
The inhibitory action of anemarrhena asphodefoides extract Phytophthora infestans mycelial growth is seen accompanying drawing 1, and the inhibition equation y=2.4981x-3.1944 that obtains anemarrhena asphodefoides extract Phytophthora infestans mycelial growth calculates according to this equation that concentration (EC50) is 1.9g/L in the inhibition of anemarrhena asphodefoides extract Phytophthora infestans mycelial growth.
The inhibitory action that anemarrhena asphodefoides extract Phytophthora infestans zoospore is sprouted is seen accompanying drawing 2, and according to the inhibition curvilinear equation y=1.9533x-0.9039 that extract is sprouted zoospore, concentration EC50 value is 1.05g/L in being inhibited.
Result of the test shows that anemarrhena asphodefoides extract Phytophthora infestans mycelial growth and phytophthora infestans zoospore are sprouted all good inhibition effect.
Biological Examples 2: bactericide of the present invention is to the daejeon prevention test of potato late blight
(medicine inspecting institute of the Ministry of Agriculture gives birth to and surveys the chamber chief editor to adopt agricultural chemicals field trial criterion, China Standard Press publishes, 2000) method of defined is tested the field efficacy of wind-weed bactericide missible oil, oil-suspending agent and aqueous suspension agent in, diluted concentration is 600 times and 800 times, and test result sees Table 1
Table 1 wind-weed bactericide is to the field efficacy of potato late blight
Formulation | Preventive effect % | |
600 times | 800 times | |
Missible oil | 90.5 | 78.2 |
Oil-suspending agent | 89.3 | 68.6 |
Aqueous suspension agent | 87.5 | 66.1 |
Missible oil: contain active component 60%
Oil-suspending agent: contain active component 20%
Aqueous suspension agent: contain active component 40%
Field test results by table 1 shows that wind-weed bactericide different dosage form Phytophthora infestans shows reasonable control efficiency, wherein dilutes 600 times processing, and preventive effect all reaches more than 85%.
Biological Examples 3: anemarrhena asphodefoides extract is to the inhibitory action test of multiple different plant pathogenic fungi mycelial growths
Test method: adopt public experimental technique known in this field " growth rate method " to test anemarrhena asphodefoides extract, the indoor bacteriostasis of cladosporium leaf and fruit mould of tomato bacterium, verticillium dahliae, root rotof flax bacterium, fusarium graminearum and ring rot of apple bacterium to botrytis cinerea.Concrete grammar is: with extract with the PDA medium dilution of fusing be 50 *, 100 *, 200 *, 400 * and 800 * totally 5 concentration, band medicine medium is poured in the 9.0cm plate, after treating the medium cooled and solidified, pathogen bacterium dish (diameter 0.6cm) is placed plate central authorities, cultivated 5-8 days down in suitable temperature (20-25 ℃), measure colony diameter, calculate inhibiting rate and draw the LD-P line.
Table 2 anemarrhena asphodefoides extract is to the inhibitory action test of multiple different plant pathogenic fungi mycelial growths
For the examination bacterial classification | The LD-P line | The EC50 value | Determination coefficient |
(Y=) | (g/L) | R 2 | |
Botrytis cinerea | 1.5746x-0.7164 | 4.2696 | 0.9872 |
The cladosporium leaf and fruit mould of tomato bacterium | 1.7141x-1.9935 | 12.0222 | 0.9908 |
Verticillium dahliae | 1.5281x-0.7173 | 5.5137 | 0.9681 |
The root rotof flax bacterium | 1.2291x+0.1735 | 8.4500 | 0.9922 |
Fusarium graminearum | 1.6543x-1.3283 | 6.6890 | 0.9865 |
The ring rot of apple bacterium | 1.6045x-1.224 | 7.5699 | 0.9947 |
Result of the test shows that anemarrhena asphodefoides extract all has good inhibition effect to multiple different plant pathogenic fungi mycelial growths.
Biological Examples 4:
Carried out the field comparative trial with the widely used bactericide Kocide WP that is used for organic farming in the world, test method is with biological Examples 2, and result of the test is as follows:
Table 3 wind-weed bactericide is to the field efficacy of potato late blight
Wind-weed bactericide preventive effect % | Kocide WP | ||
Formulation | 600 times | 800 times | 1000 times |
Missible oil | 90.5 | 78.2 | 92.0% |
Oil-suspending agent | 89.3 | 68.6 | 85.0% |
Aqueous suspension agent | 87.5 | 66.1 | 90.9% |
Missible oil: contain active component 60%
Oil-suspending agent: contain active component 20%
Aqueous suspension agent: contain active component 40%
Result of the test shows: bactericide of the present invention is compared with existing bactericide has preventive effect preferably.
Though above the present invention is described in detail with a general description of the specific embodiments, on basis of the present invention, can make some modifications or improvements it, this will be apparent to those skilled in the art.Therefore, not departing from the these modifications or improvements basically of spirit of the present invention, all belong to the scope of protection of present invention.
Claims (3)
1. anemarrhena asphodefoides extract is as the application of disinfectant use in agriculture control corps diseases, wherein, the cause of disease of described corps diseases is following: phytophthora infestans, tomato late blight bacterium, cladosporium leaf and fruit mould of tomato bacterium, cotton verticillium wilt, root rotof flax bacterium, fusarium graminearum, Exserohilum turcicum, ring rot of apple bacterium, botrytis cinerea, melon white powder germ and bacterium of downy mildew of cucumber.
2. according to the application of claim 1, wherein, the cause of disease of described corps diseases is following: phytophthora infestans, tomato late blight bacterium, botrytis cinerea, cladosporium leaf and fruit mould of tomato bacterium, verticillium dahliae, root rotof flax bacterium, fusarium graminearum and ring rot of apple bacterium.
3. according to the application of claim 1 or 2, wherein, described anemarrhena asphodefoides extract mainly contains at least a following wind-weed and extracts compound: mangiferin, isomangiferin, timosaponin, chinaroot greenbrier sapogenin, wind-weed total polysaccharides.
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