DK142561B - HERBICID CONTAINING A THIOL CARBAMATE - Google Patents

HERBICID CONTAINING A THIOL CARBAMATE Download PDF

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DK142561B
DK142561B DK116574AA DK116574A DK142561B DK 142561 B DK142561 B DK 142561B DK 116574A A DK116574A A DK 116574AA DK 116574 A DK116574 A DK 116574A DK 142561 B DK142561 B DK 142561B
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plants
active substance
herbicide
thiol
herbicid
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DK116574AA
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DK142561C (en
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A Fischer
H Hansen
W Rohr
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Basf Ag
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D205/00Heterocyclic compounds containing four-membered rings with one nitrogen atom as the only ring hetero atom
    • C07D205/02Heterocyclic compounds containing four-membered rings with one nitrogen atom as the only ring hetero atom not condensed with other rings
    • C07D205/04Heterocyclic compounds containing four-membered rings with one nitrogen atom as the only ring hetero atom not condensed with other rings having no double bonds between ring members or between ring members and non-ring members

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  • Agricultural Chemicals And Associated Chemicals (AREA)

Description

OD FREMLÆGGELSESSKRIFT 1^2561 (ύ i m \Rl DANMARK ίδ1) lntCI'3 A 01 M 47/16 // c 07 d 205/04 «(21) Ansøgning nr. 1 1 65/7^ (22) Indleveret den 5· m8T. 1974 (24) Løbedag 5· tnar. 1974 (44) Ansøgningen fremlagt og fremfaeggelsesskriftet offentliggjort den 24 . nov « 1 9®0 DIREKTORATET FOR t PATENT-OG VAREMÆRKEVÆSENET (30) Pnorrtet begæret fra denOD PUBLICATION NOTICE 1 ^ 2561 (ύ im \ Rl DENMARK ίδ1) lntCI'3 A 01 M 47/16 // c 07 d 205/04 '(21) Application No 1 1 65/7 ^ (22) Filed on 5 · M8T. 1974 (24) Race day 5 · tnar. 1974 (44) The application presented and the petition published on 24. Nov «1 9®0 DIRECTORATE FOR THE PATENT AND TRADEMARKET SYSTEM (30) The inquiry requested from the

10. mar. 197?, 2512045, DEMar 10 197 ?, 2512045, DE

(71) BASF AKTIENGESELLSCHAFT, 6700 Ludwigshafen, DE.(71) BASF AKTIENGESELLSCHAFT, 6700 Ludwigshafen, DE.

(72) Opfinder: Adolf Fischer, Deidesheimer Strasse 4, 6704 Mutterstadt, DE: Hanspeter Hansen, Thorwaldsenstrasse 5, 6700 Ludwlgshafen, DE:(72) Inventor: Adolf Fischer, Deidesheimer Strasse 4, 6704 Mutterstadt, DE: Hanspeter Hansen, Thorwaldsenstrasse 5, 6700 Ludwlgshafen, DE:

Wolfgang Rohr, ~Gont ar ds trae s e 4, 6800 Mannheim 1, DE.Wolfgang Rohr, ~ Gont ar ds trae s e 4, 6800 Mannheim 1, DE.

(74) Fuldmægtig under sagens behandling:(74) Plenipotentiary in the proceedings:

Ingeniørfirmaet Hofman-Bang & Boutard.Hofman-Bang & Boutard Engineering Company.

(54) Herbicid indeholdende et thiolcarbamat.(54) Herbicide containing a thiol carbamate.

Opfindelsen angår et herbicid, der indeholder et nyt, værdifuldt thiolcarbamat, og herbicidet ifølge den foreliggende opfindelse er ejendommeligt ved, at thiolcarbamatet er S-(2,3>3-trichlorallyl)- 2,2,4-trimethyl-azetidin-l-thiolcarboxylat.The invention relates to a herbicide containing a new valuable thiol carbamate and the herbicide of the present invention is characterized in that the thiol carbamate is S- (2,3> 3-trichloroallyl) -2,2,4-trimethyl-azetidine-1 thiolcarboxylate.

Det er kendt at anvende S-ethyl-hexahydroazepin-l-thiolcarboxylat til bekæmpelse af uønskede planter i kulturer af nytteplanter, såsom byg, hvede og ris. Virkningen deraf er dog dårlig.It is known to use S-ethyl-hexahydroazepine-1-thiol carboxylate to control undesirable plants in crops of crops such as barley, wheat and rice. However, its effect is poor.

Det har nu vist sig, at thiolcarbamatet af en azetidin med formlen 2 142561 CH, CH-z A 0,1 yci \/ S 2 Na udviser en god herbicid virkning. Det har ved den samme og ofte ved bedre herbicid virkning en bedre kulturplanteforligelighed end det kendte S-ethyl-hexahydroazepin-l-thiolcarboxylat.It has now been found that the thiol carbamate of an azetidine of formula 2 CH, CH-z A 0.1 µl / S 2 Na exhibits good herbicidal activity. It has, at the same and often better herbicide effect, better plant-plant compatibility than the known S-ethyl-hexahydroazepine-1-thiol carboxylate.

Det er endvidere fra beskrivelsen til USA-patent nr. 3 066 020 kendt at.anvende thiolcarbamater til bekæmpelse af uønsket plantevækst. Til disse hører S-(2,3,3-trichlorallyl)-l-pyrrolidin-thiol-carboxylat, og det har nu vist sig, at det thiolcarbamat, der indgår i herbicidet ifølge opfindelsen, har en i forhold hertil fordelagtig herbicid virkning.Further, from the specification of US Patent No. 3 066 020, it is known to use thiol carbamates to control undesired plant growth. These include S- (2,3,3-trichloroallyl) -1-pyrrolidine thiol carboxylate, and it has now been found that the thiol carbamate included in the herbicide of the invention has an advantageous herbicidal activity in relation thereto.

Fremstillingen af det aktive stof kan gennemføres på den måde, at man omsætter en chlormyresyrethiolester med den pågældende substituerede azetidin. På lignende måde kan man fremstille det aktive stof, når man lader azetidinen i form af det tilsvarende N-carboxyl syre chlor id reagere med en mercaptan.The preparation of the active substance can be carried out by reacting a chloroformic acid ether ester with the substituted azetidine in question. Similarly, the active substance can be prepared by reacting the azetidine in the form of the corresponding N-carboxylic acid chloride with a mercaptan.

Fremstillingen af azetidinerne er kendt fra litteraturen.The preparation of the azetidines is known from the literature.

Med henblik på karakterisering af herbicidet ifølge opfindelsen kan det angives, at S-(2,3,3-trichlorallyl)-(2,2,4-trimethyl-aze-tidin)-l-thiolcarboxylat udviser en værdi af Kp.Q 01 På 130°.In order to characterize the herbicide of the invention, it may be stated that S- (2,3,3-trichloroallyl) - (2,2,4-trimethyl-aze-tidin) -1-thiol carboxylate exhibits a value of Kp.Q 01 At 130 °.

Dispenseringen foretages f.eks. i form af direkte udsprøjtelige opløsninger, pulvere, suspensioner eller dispersioner, emulsioner, oliedispersioner, pastaer, pudringsmidler, udstrøningsmidler, granulater ved udsprøjtning, tågedannelse, forstøvning, udstrøning eller udhældning. Dispenseringsformeme retter sig helt efter anvendelsesformålene; de skal i hvert tilfælde sikre den finest mulige fordeling af det aktive stof, der indgår i herbicidet ifølge opfindelsen.The dispensing is carried out e.g. in the form of directly extrudable solutions, powders, suspensions or dispersions, emulsions, oil dispersions, pastes, powders, emulsifiers, granules by extrusion, mist formation, atomization, spraying or pouring. The dispensing forms are entirely directed to the uses; they must in each case ensure the finest possible distribution of the active ingredient contained in the herbicide according to the invention.

Til fremstilling af direkte udsprøjtelige opløsninger, emulsioner, pastaer og oliedispersioner kommer mineraloliefraktioner med middelhøjt til højt kogepunkt, såsom kerosin eller dieselolie, desuden kultjæreolier, samt olier af vegetabilsk eller animalsk oprindelse, alifatiske, cycliske og aromatiske carbonhydrider, f.eks. benzen, 3 142561 toluen, xylen, paraffin, tetrahydronaphthalen, alkylerede naphtha-lener eller derivater deraf, f.eks. methanol, ethanol, propanol, butanol, chloroform, tetrachlorkulstof, cyclohexanol, cyclohexa-non, chlorbenzen, isophoron, stærkt polære opløsningsmidler, f.eks. dimethylformamid, dimethylsulfoxid, N-methylpyrrolidon og vand^ i betragtning.For the preparation of direct sprayable solutions, emulsions, pastes and oil dispersions, medium to high boiling mineral oil fractions such as kerosene or diesel oil, in addition, coal and petroleum oils, as well as vegetable or animal origin oils, aliphatic, cyclic and aromatic hydrocarbons, e.g. benzene, toluene, xylene, paraffin, tetrahydronaphthalene, alkylated naphthalene or derivatives thereof, e.g. methanol, ethanol, propanol, butanol, chloroform, tetrachlorocarbon, cyclohexanol, cyclohexanone, chlorobenzene, isophorone, highly polar solvents, e.g. dimethylformamide, dimethylsulfoxide, N-methylpyrrolidone and water ^ in consideration.

Vandige dispenseringsformer kan fremstilles af emulsionskoncentrater, pastaer eller befugtelige pulvere (sprøjtepulvere), oliedispersioner ved tilsætning af vand. Til fremstilling af emulsioner, pastaer eller oliedispersioner kan man i vand homogenisere suspensionerne, som sådanne eller opløst i en olie eller et opløsningsmiddel, ved hjælp af befugtnings-, adhæsions-, dispergerings- eller emulgeringsmiddel. Man kan også fremstille koncentrater, der består af aktiv substans, befugtnings-, adhæsions-, dispergerings-eller emulgeringsmiddel og eventuelt opløsningsmiddel eller olie, hvilke koncentrater er velegnet til fortynding med vand.Aqueous dispensing forms can be prepared from emulsion concentrates, pastes or wettable powders (spray powders), oil dispersions by the addition of water. For the preparation of emulsions, pastes or oil dispersions, the suspensions, as such or dissolved in an oil or solvent, can be homogenized by wetting, adhesion, dispersing or emulsifying agents. Concentrates consisting of active substance, wetting, adhesive, dispersing or emulsifying agent and optionally solvent or oil may also be prepared which concentrates are suitable for dilution with water.

Som overfladeaktive stoffer kan man anføre:As surfactants, you can state:

Alkali-, jordalkali-, ammoniumsalte af ligninsulfonsyre, naphthalen-sulfonsyrer, phenolsulfonsyrer, alkylsulfonater, alkylsulfater, alkylsulfonater, alkali- og jordalkalisalte af dibutylnaphthalen-sulfonsyre, laurylethersulfat, fedtalkoholsulfat, fedtsure alkali-og jordalkalisalte, salte af sulfaterede hexadeeanoler, heptadeca-noler, octadecanoler, salte af sulfaterede fedtalkoholglycolethere, kondensationsprodukter af sulfoneret naphthalen og naphthalenderi-vater med formaldehyd, kondensationsprodukter af naphthalen eller naphthalensulfonsyre med phenol og formaldehyd, polyoxyethylen-octylphenolether, ethoxyleret isooctylphenol, octylphenol eller no-nylphenol, alkylphenolpolyglycolether, tributylphenylpolyglycolether, alkylarylpolyetheralkoholer, isotridecylalkohol» fedtalkoholethylen-oxidkondensater, ethoxyleret ricinusolie, polyoxyethylenalkylether, ethoxyleret polyoxypropylen, laurylalkoholpolyglycoletheracetal, sorbitester, lignin, sulfitaffaldslud og methylcellulose.Alkali, alkaline earth, ammonium salts of lignin sulphonic acid, naphthalene sulphonic acids, phenol sulphonic acids, alkyl sulphonates, alkyl sulphates, alkyl sulphonates, alkali and alkaline earth salts of dibutyl naphthalene sulphate, lauryl ether sulphate salts, fatty alcohol sulphates, fatty alcohol sulphates octadecanols, salts of sulfated fatty alcohol glycol ethers, condensates of sulfonated naphthalene and naphthalenderi derivatives with formaldehyde, condensates of naphthalene or of naphthalenesulfonic acid with phenol and formaldehyde, polyoxyethylene octylphenol ethers, ethoxylated isooctylphenol, octylphenol or nonylphenol, alkylphenol polyglycol ethers, tributylphenyl, alkylaryl polyether alcohols, isotridecyl alcohol "fatty alcohol ethylene -oxide condensates, ethoxylated castor oil, polyoxyethylene alkyl ether, ethoxylated polyoxypropylene, lauryl alcohol polyglycol ether acetal, sorbitester, lignin, sulfite waste liquor and methyl cellulose.

Pulvere, udstrøning- og pudringsmidler kan fremstilles ved blanding eller fælles formaling af det aktive stof med et fast bærestof.Powders, emulsifiers and powders may be prepared by mixing or co-grinding the active substance with a solid carrier.

Granulater, f. eks. omhyllings-, imprægnerings- og homogengranulater, kan fremstilles ved binding af de aktive stoffer til faste 4 142561 bærestoffer. Faste bærestoffer er f. eks. mineraljorder, såsom kiselsyrer, kiselgeler, silicater, kaolin, attaler, kalksten,. kalk, kridt, talkum, bolus, løss, ler, dolomit, diatomejord, calcium- og magnesiumsulfat, magnesiumoxid, formalede formstoffer, gødningsmidler, som f.eks. ammoniumsulfat, ammoniumphosphat, ammoniumnitrat, urinstoffer og vegetabilske produkter, såsom korn-mel, træ- og nøddeskalmel, cellulosepulver og andre faste bærestoffer.Granules, e.g., envelope, impregnation, and homogeneous granules, may be prepared by binding of the active substances to solid carriers. Solid carriers are, for example, mineral soils such as silicas, silicas, silicates, kaolin, aggregates, limestones. lime, chalk, talc, bolus, lice, clay, dolomite, diatomaceous earth, calcium and magnesium sulphate, magnesium oxide, milled molds, fertilizers, e.g. ammonium sulphate, ammonium phosphate, ammonium nitrate, urea and vegetable products such as cereal, wood and nutmeal flour, cellulose powder and other solid carriers.

Midlerne indeholder mellem 0,1 og 95 vægt-% aktivt stof, fortrinsvis mellem 0,5 og 90 vægt-%.The agents contain between 0.1 and 95% by weight of active substance, preferably between 0.5 and 90% by weight.

Til blandingerne eller de enkelte, aktive stoffer kan man tilsætte olier af forskellig type, herbicider, fungicider, nematodicider, insekticider, baktericider, sporelemeneter, gødningsmidler, anti-skummidler (siliconer), vækstregulatorer, modgifte eller andre herbicidt virkende forbindelser, eventuelt også først umiddelbart før anvendelsen (tankmix). De sidst angivne, herbicide forbindelser kan også bringes i anvendelse før eller efter herbicidet ifølge opfindelsen eller blandingerne deraf.To the mixtures or individual active substances can be added oils of different types, herbicides, fungicides, nematodicides, insecticides, bactericides, trace elements, fertilizers, anti-foaming agents (silicones), growth regulators, antidotes or other herbicidal compounds, possibly also immediately before use (tank mix). The last listed herbicidal compounds may also be used before or after the herbicide of the invention or mixtures thereof.

Tilblandingen af disse midler til herbicidet ifølge opfindelsen kan foretages i vægtforholdet 1:10 til 10:1.The admixture of these agents to the herbicide of the invention can be made in a weight ratio of 1:10 to 10: 1.

Midlet ifølge opfindelsen kan anvendes en eller flere gange.The agent according to the invention can be used once or more.

Den anvendte mængde af midlet ifølge opfindelsen kan variere. Den anvendte mængde afhænger hovedsageligt af arten af den ønskede effekt.The amount of agent used according to the invention may vary. The amount used depends mainly on the nature of the desired effect.

Den anvendte mængde ligger i almindelighed mellem 0,1 og 15 kg aktivt stof per ha eller derover, fortrinsvis mellem 0,2 og 6 kg aktivt stof per ha.The amount used is generally between 0.1 and 15 kg of active substance per hectare or more, preferably between 0.2 and 6 kg of active substance per hectare.

Det nye aktive stof udviser en stærkt herbicid virkning og kan derfor anvendes som ukrudtsdræbende middel eller til bekæmpelse af uønsket plantevækst. Om det nye aktive stof virker som totalt eller selektivt middel afhænger hovedsageligt af mængden af aktivt stof per fladeenhed.The new active substance exhibits a strong herbicidal action and can therefore be used as a herbicide or to control undesired plant growth. Whether the new active substance acts as a total or selective agent depends mainly on the amount of active substance per unit area.

5 1425615 142561

Ved ukrudt eller uønsket plantevækst skal man forstå alle mono-kotyle og dikotyle planter, der vokser på steder, hvor de ikke er ønsket.By weed or unwanted plant growth, all monocotyledonous and dicotyledonous plants that grow in places where they are not desired must be understood.

EKSEMPEL 1 I et drivhus fyldte man forsøgsurtepotter med lerholdig sandjord, og der tilsåedes med forskellige frø. Umiddelbart derefter foretoges behandlingen med det aktive stof VI, der indgår i midlet i-følge opfindelsen, i sammenligning med det kendte aktive stof III, i hvert tilfælde dispergeret eller emulgeret i 500 1 vand per ha.EXAMPLE 1 In a greenhouse, experimental herb pots were filled with clay-containing sandy soil, and various seeds were sown. Immediately thereafter, treatment with the active substance VI contained in the agent according to the invention, in comparison with the known active substance III, was in each case dispersed or emulsified in 500 liters of water per hectare.

Den anvendte mængde androg i hvert tilfælde 1 kg/ha.The amount used was in each case 1 kg / ha.

I forsøgstiden modtog planterne en stor nedbørsmængde. Efter 4 ugers forløb kunne det konstateres, at det aktive stof VI udviste en bedre forligelighed overfor kulturplanter og en bedre herbicid virkning end det kendte stof III.During the experimental period, the plants received a large amount of rainfall. After 4 weeks, it was found that the active substance VI showed better compatibility with culture plants and a better herbicidal effect than the known substance III.

Aktivt stof III: [ \c-S-CXActive substance III: [\ c-S-CX

(sammenlignings- k / J! middel) u CH3y^CH3 Cl(comparative k / J means) u CH3y ^ CH3 Cl

Aktivt stof VI: < N-C-S-CH0-C=C^ V s Xci ch3Active substance VI: <N-C-S-CH0-C = C ^ V s Xci ch3

Forsøgsresultaterne fremgår af tabel 1.The experimental results are shown in Table 1.

142561 6 TABEL 1TABLE 1

aktivt stof III VIactive substance III VI

kg/ha 1 1kg / ha 1 1

Nytteplanter:Utility Plants:

Brassica napus (raps) 10 0Brassica napus (rapeseed) 10 0

Triticum aestivum (hvede) 15 0 Uønskede planter:Triticum aestivum (wheat) 15 0 Unwanted plants:

Echinochloa crus-galli 40 60 (hanespore)Echinochloa crus-galli 40 60 (male spore)

Lolium multiflorum 20 80 (italiensk rajgræs)Lolium multiflorum 20 80 (Italian ryegrass)

Lolium perenne 20 80 (engelsk rajgræs)Lolium perenne 20 80 (English ryegrass)

Avena fatua 0 40 (flyvehavre)Avena fatua 0 40 (flying oats)

Poa annua 30 85 (enårigt rapgræs)Poa annua 30 85 (annual rapeseed)

Poa trivialis 30 85 (almindeligt rapgræs) 0 = uden beskadigelse 100 = total beskadigelse EKSEMPEL 2Poa trivialis 30 85 (common rapeseed) 0 = without damage 100 = total damage EXAMPLE 2

Ved en væksthøjde på mellem 3 og 15 cem behandledes forskellige planter med det aktive stof, der indgår i midlet ifølge opfindelsen, i sammenligning med det kendte aktive stof III, i hvert tilfælde dispergeret eller emulgeret i 500 1 vand per ha.At a growth height of between 3 and 15 cm, various plants are treated with the active ingredient of the invention in comparison with the known active substance III, in each case dispersed or emulsified in 500 l water per hectare.

Den anvendte mængde androg i hvert tilfælde 1 kg aktivt stof/ha. I forsøgstiden modtog planterne en høj nedbørsmængde. Efter 4 ugers forløb kunne det konstateres, at det aktive stof, der indgår i mid- 7 U256 1 let ifølge opfindelsen, udviste en bedre forligelighed overfor kulturplanter ved den samme herbicide virkning end det kendte stof III.The amount used in each case was 1 kg of active substance / ha. During the experimental period, the plants received a high amount of rainfall. After 4 weeks, it was found that the active substance included in the intermediate light according to the invention showed a better compatibility with culture plants with the same herbicidal effect than the known substance III.

TABEL 2TABLE 2

aktivt stof III VIactive substance III VI

kg/ha 1 1kg / ha 1 1

Nytteplanter:Utility Plants:

Brassica napus (raps) 10 0Brassica napus (rapeseed) 10 0

Triticum aestivum (hvede) 5 0 Uønskede planter:Triticum aestivum (wheat) 5 0 Unwanted plants:

Echinochloa crus-galli 40 60 (hanespore)Echinochloa crus-galli 40 60 (male spore)

Lolium multiflorum 20 70 (italiensk rajgræs)Lolium multiflorum 20 70 (Italian ryegrass)

Lolium perenne 20 70 (engelsk rajgræs)Lolium perenne 20 70 (English ryegrass)

Aventa fatua 0 40 (flyvehavre)Aventa fatua 0 40 (flying oats)

Poa annua 30 70 (enårigt rapgræs)Poa annua 30 70 (annual rapeseed)

Poa trivialis 30 65 (almindeligt rapgræs) 0 = uden beskadigelse 100 = total beskadigelse EKSEMPEL 3 1 dette eksempel sammenlignes virkningerne af ? ^ClPoa trivialis 30 65 (common rapeseed) 0 = without damage 100 = total damage EXAMPLE 3 1 this example compares the effects of? Cl

VN-C-S-CH~-C=CCVN-C-S-CH ~ -C = CC

dj δ ^C1 8 142561dj δ ^ C1 8 142561

med virkningen af Bwith the effect of B

-^ Cl .Cl N-C-S-CH _C=C^ -1 !! ^ \ O XC1- ^ Cl .Cl N-C-S-CH _ C = C ^ -1 !! ^ \ O XC1

Sammenligningsforbindelsen B er kendt fra U.S.A. patent nr. 3.066.020.Comparative Compound B is known from U.S.A. Patent No. 3,066,020.

1. Drivhusforsøg1. Greenhouse trials

Man fyldte lerholdig og sandholdig jord indeholdende 1,5% humus i paraffinerede papirbægre med et volumen på 200 cm. Forsøgs-planterne, der var separeret artsvis, blev derpå sået overfladisk. På grund af det tynde jordbundsdække kunne nogle frø kontaktes direkte af sprøjtevæsken. Forsøgsstofferne blev påført øjeblikkeligt efter såningen. De blev suspenderet eller emulgeret i vand som bæremedium og sprøjtet på overfladen af jorden ved hjælp af effektive forstøvere. Påføringsintensiteterne er angivet i tabellerne. Beholderne blev derpå vandet og dækket med transparente formstoflåg. Dette dække bibeholdt fugtigheden og sikrede ensartet spiring af forsøgsplanterne, og det forhindrede også ethvert fordampningstab på grund af volatilitet.Soil-containing and sandy soil containing 1.5% humus was filled in paraffinized paper cups with a volume of 200 cm. The experimental plants, which were separated species, were then sown superficially. Due to the thin soil cover, some seeds could be contacted directly by the spray liquid. The test substances were applied immediately after sowing. They were suspended or emulsified in water as a carrier medium and sprayed onto the surface of the soil using effective nebulizers. The application intensities are given in the tables. The containers were then watered and covered with transparent plastic lids. This cover retained the moisture and ensured uniform germination of the test plants, and it also prevented any evaporation loss due to volatility.

Dækkene blev fjernet efter at forsøgsplanterne havde spiret (3 dage). I de 4 uger, forsøget varede, blev beholderne holdt grundigt fugtige. I afhængighed af temperaturkravene af de anvendte planter blev beholderne enten i den kolde (10-15° C) eller varmere (18-28° C) del af drivhuset. Forsøgene blev bedømt visuelt på en skala, der strækker sig fra 0 til 100, idet 0 betyder ingen beskadigelse og 100 betyder fuldstændig ødelæggelseThe tires were removed after the experimental plants had germinated (3 days). During the 4 weeks of the experiment, the containers were kept thoroughly moist. Depending on the temperature requirements of the plants used, the containers were either in the cold (10-15 ° C) or warmer (18-28 ° C) part of the greenhouse. The experiments were evaluated visually on a scale ranging from 0 to 100, with 0 meaning no damage and 100 meaning complete destruction.

Man anvendte følgende forsøgsplanter: 9 142561The following experimental plants were used: 9 142561

Latinsk navn Forkortelse i tabeller BetegnelseLatin name Abbreviation in tables Designation

Alopecurus Alopecurus agerrævehale myosuroides myosuroidesAlopecurus Alopecurus fox tail myosuroides myosuroides

Avena fatua Avena fat. flyvehavreAvena fatua Avena fat. Wild oats

Beta vulgaris Beta vulg. sukkerroeBeta vulgaris Beta vulgaris. sugarbeet

Brassica napus Brassica napus rapsBrassica napus Brassica napus rape

Bromus inermis Bromus inermis hejreBromus inermis Bromus inermis right

Digitaria Digitaria fingeraks sanguinalis sang.Digitaria Digitaria fingeraks sanguinalis song.

Echinochloa Echinochloa hanespore crus-galli crus g.Echinochloa Echinochloa male spores crus-galli crus g.

Glycine max Glycine max sojaGlycine max Glycine max soy

Gossypium Gossypium bomuld hirsutum hirs.Gossypium Gossypium cotton hirsutum millet.

Hordeum Hordeum byg vulgare vulg.Hordeum Hordeum barley vulgare vulg.

Lolium Lolium mult. italiensk rajgræs multiflorumLolium Lolium mult. Italian ryegrass multiflorum

Lolium perenne Lolium peren. engelsk rajgræsLolium pear Lolium pear. English ryegrass

Poa annua Poa annua enårigt rapgræsPoa annua Poa annua annual rapeseed

Poa trivialis Poa triv. almindeligt rapgræsPoa trivialis Poa trivial. plain rap grass

Sinapis alba Sinapis alba hvid sennepSinapis alba Sinapis alba white mustard

Sorghum halepense Sorghum halep. durraSorghum tail pens Sorghum tail. sorghum

Triticum aestivum Triticum aestiv. hvedeTriticum aestivum Triticum aestiv. wheat

Zea mays Zea mays majsZea mays Zea mays corn

Resultater af drivhusforsøg:Greenhouse test results:

Virkningen af sammenligningsmidlet B på uønskede planter var for svag til, at det kunne betragtes som et herbicid; dets gode forligelighed med afgrøderne har derfor ingen betydning. Det nye herbicid A var langt overlegent i herbicid henseende og var selektivt ved et antal kulturplanter (tabel 3)·The effect of Comparative B on undesirable plants was too weak for it to be considered a herbicide; its good compatibility with the crops therefore does not matter. The new herbicide A was far superior in herbicide terms and was selective in a number of culture plants (Table 3) ·

Det er særligt slående ved sammenligning af de nedenfor angivne tal, at den nye forbindelse A med en substitueret azetidinring udmærker sig ved en stærkt herbicid virkning, hvorimod den kendte forbindelse B, der indeholder en pyrrolidinring, er tydeligt underlegen.It is particularly striking when comparing the figures given below that the new compound A with a substituted azetidine ring is distinguished by a strong herbicidal action, whereas the known compound B containing a pyrrolidine ring is clearly inferior.

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12 142561 2. Frilandsforsøg12 142561 2. Free Trial

De stoffer, der blev anført i afsnittet om drivhusforsøg, blev også sammenlignet på friland. Til dette formål anvendte man følgende metode: a) Indarbejdning før udsåning.The substances listed in the section on greenhouse trials were also compared on the outside. For this purpose, the following method was used: a) Incorporation before sowing.

Ved denne metode indarbejdede man de kemiske stoffer før såningen af kulturplanterne nogle cm dybt i jorden. Derved reduceres fordampningstab ved let flygtige forbindelser. Ganske vist forøges derved risikoen for beskadigelse af kulturplanterne med midler, hvis selektivitet må bedømmes som værende noget kritisk.This method incorporated the chemical substances before sowing the culture plants a few cm deep in the soil. Thereby, evaporation losses are reduced by slightly volatile compounds. Admittedly, this increases the risk of damage to the culture plants by means whose selectivity must be judged to be somewhat critical.

a1) Det her først beskrevne forsøg blev påbegyndt om efteråret med vinterhvede. Forsøgsstedet var en jordbund, der må betegnes som et lerholdigt sand med 1,3% humus og et pH på 4,8. Dispenseringen af stofferne foregik ved hjælp af en motoriseret sprøjte med vand som fordelingsmiddel på små parceller.a1) The experiment described here first began in the autumn with winter wheat. The test site was a soil which must be described as a clay-containing sand with 1.3% humus and a pH of 4.8. The dispensing of the substances was carried out by means of a motorized syringe with water as a distribution agent on small parcels.

Bedømmelsen, som er gengivet i tabel 4, foregik 4 uger efter behandlingen og udsåningen.The assessment, presented in Table 4, took place 4 weeks after treatment and sowing.

De følgende planter forekom i forsøgsarealet:The following plants appeared in the experimental area:

Latinsk navn Forkortelser i tabel 4 Dansk betegnelseLatin name Abbreviations in Table 4 Danish designation

Alopecurus Alopecurus agerrævehale myosuroides MyosuroidesAlopecurus Alopecurus fox tail myosuroides Myosuroides

Galium aparine Galium apar. burresnerleGalium aparine Galium apar. burresnerle

Stellaria media Stellaria media fuglegræsStellaria media Stellaria media bird grass

Triticum aestivum Triticum aestiv. hvedeTriticum aestivum Triticum aestiv. wheat

Resultat (tabel 4) 1. Ingen af de kemiske stoffer viste nogen brugbar virkning mod de to bredbladede ukrudtsarter Galium aparine og Stellaria media.Result (Table 4) 1. Neither chemical showed any useful effect against the two broadleaf weeds Galium aparine and Stellaria media.

2. Sammenligningsmidlet B mistede også på friland sin betydning på grund af mangel på aktivitet mod ugræsset Alopecurus myosu- 13 U256 1 roides.2. Comparative B also lost its importance in the open field due to lack of activity against the weed Alopecurus myosu- 13 U256 1 roides.

De her angivne frilandsforsøg bekræfter iagttagelserne fra de før angivne drivhusforsøg. I henhold dertil forblev sammenlignings-midlet B med pyrrolidinringen værdiløst i sammenligning med forbindelsen A, der skal undersøges.The open-country experiments listed here confirm the observations from the previously stated greenhouse experiments. Accordingly, the comparator B with the pyrrolidine ring remained worthless in comparison with the compound A to be tested.

Konklusion.Conclusion.

Den nye forbindelse A var i herbicid henseende langt overlegen i sammenligning med den nærmest beslægtede, kenate forbindelse B.The new compound A was, in herbicide, far superior in comparison to the closely related kenate compound B.

Tabel 4 Fjernelse af uønskede græsser i hvede (Triticum aestivum) med herbicide thiolcarbamater på friland.Table 4 Removal of unwanted grasses in wheat (Triticum aestivum) with herbicidal thiol carbamates outdoors.

Forsøgsplanter og % beskadigelse Forsøgs- Anvendt Triticum Alope- Galium Stellaria stof mængde aestiv. curus apar. media kg/ha myosu- _roides_ A 0,5 0 8 0 0 1.0 0 22 O 0 1.5 0 45 o 2,5 2.0 0 55 5 8 4.0 5 68 12 28 B 0,5 0 0 0 0 1.0 0 0 0 0 1.5 0 5 0 0 2,0 0 8 0 5 4,0 0 20 0 5 O = ingen beskadigelse 100 = total beskadigelseExperimental plants and% damage Experimental Applied Triticum Alope- Galium Stellaria substance amount of aestiv. curus apar. media kg / ha myosu- _roides_ A 0.5 0 8 0 0 1.0 0 22 O 0 1.5 0 45 o 2.5 2.0 0 55 5 8 4.0 5 68 12 28 B 0.5 0 0 0 0 1.0 0 0 0 0 1.5 0 5 0 0 2.0 0 8 0 5 4.0 0 20 0 5 O = no damage 100 = total damage

DK116574A 1973-03-10 1974-03-05 HERBICID CONTAINING A THIOL CARBAMATE DK142561C (en)

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DE2457688A1 (en) * 1974-12-06 1976-06-10 Basf Ag CARBAMINE ETHIOLESTER
GB2140003A (en) * 1983-04-13 1984-11-21 Shell Int Research Azetidine derivatives suitable for inducing male sterility in plants
US4534787A (en) * 1984-05-24 1985-08-13 Shell Oil Company N-L-seryl-3-azetidinecarboxylic acid
EP0350693B1 (en) * 1988-07-15 1994-09-28 BASF Aktiengesellschaft Azetidine derivatives, process for their preparation and their use in the regulation of plant growth
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IL44238A (en) 1977-06-30
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AT331070B (en) 1976-08-10
CS181753B2 (en) 1978-03-31

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