EP0900014A1

EP0900014A1 - Fungicide mixtures

Info

Publication number: EP0900014A1
Application number: EP97921704A
Authority: EP
Inventors: Ruth Müller; Herbert Bayer; Hubert Sauter; Eberhard Ammermann; Gisela Lorenz; Siegfried Strathmann; Klaus Schelberger; Maria Scherer
Original assignee: BASF SE
Current assignee: BASF SE
Priority date: 1996-04-26
Filing date: 1997-04-23
Publication date: 1999-03-10
Also published as: JP2000509060A; CO4761016A1; WO1997040677A1; US6114378A; AU2768297A

Abstract

This invention concerns a fungicide mixture containing in a synergistically effective amount a) an oxime ether of formula (I), in which the substituents have the following meaning: X is oxygen or amino (NH), Y is CH or N; Z is oxygen, sulphur, amino (NH) or C1-C4-alkyl amino(N-C1-C4-alkyl); R' is C1-C6-alkyl, C1-C6-alkyl halide, C3-C6-alkenyl, C2-C6-alkenyl halide, C3-C6-alkinyl, C3-C6-alkinyl halide, C3-C6-cycloakyl-methyl or benzyl, which can be either partially or completely halogenated and/or can carry one to three of the following radicals: cyano, C1-C4-alkyl, C1-C4-alkyl halide, C1-C4-alkoxy, C1-C4-alkoxy halide, and C1-C4-alkylthio, and b) a dithiocarbamate (II) selected from the group manganese bisethylene (dithiocarbamate)(zinc complex)(IIa), manganese bisethylene (dithiocarbamate) (zinc complex) (IIb), zinc ammoniate bisethylene (dithiocarbamate)(IIc), and zinc bisethylene (dithiocarbamate) (IId), and/or c) 1-(2-cyano-2-methoxyiminoacetyl)-3-ethylcarbamide (III) H3CCH2-NHCONH-C(CN)=NOCH3.

Description

Fungicidal mixtures

description

The present invention relates to a fungicidal mixture, which

a) an oxime ether of the formula I,

in which the substituents have the following meaning:

X is oxygen or amino (NH);

Y is CH or N;

Z is oxygen, sulfur, amino (NH) or C 1 -C ₄ alkylamino (N -C 1 -C ₄ alkyl);

R 'Cι-C ₆ -alkyl, C ₆ haloalkyl, C ₃ -C ₆ alkenyl, C ₂ -C ₆ logenalkenyl -Ha-, C ₃ -C ₆ alkynyl, C ₃ -C ₆ haloalkynyl, C ₃ -C ₆ -cycloalkyl-methyl, or benzyl which can be partially or fully halogenated and / or may carry one to three of the following radicals: cyano, C ₄ -alkyl, C ₄ haloalkyl, Cx ^ -Alkoxy, -CC ₄ haloalkoxy and -CC ₄ alkylthio;

and

b) a dithiocarbamate (II) selected from the group

Manganese ethylene bis (dithiocarbamate) (zinc complex) (lla), Manganese ethylene bis (dithiocarbamate) (llb), zinc ammonium ethylene bis (dithiocarbamate) (IIc) and zinc ethylene bis (dithiocarbamate) (Ild), and / or

c) 1- (2-cyano-2-methoxyiminoacetyl) -3-ethyl urea f (III)

H ₃ CCH ₂ -NHCONH-C (CN) = NOCH ₃ III

in a synergistically effective amount. In addition, the invention relates to methods for controlling harmful fungi with mixtures of the compounds I, II and / or III and the use of the compounds I, II and III for the production of such mixtures.

The compounds of formula I, their preparation and their activity against harmful fungi are known from the literature (WO-A 95 / 21,153, WO-A 95 / 21,154, DE-A 195 28 651.0).

Also known are the dithiocarbamates II (Ila: common name: Mancozeb, US-A 3,379,610; llb: common name: Maneb, US-A 2,504,404; IIc: former common name: Metiram, US-A 3,248,400; Ild: common name: Zineb, US-A 2,457,674), their preparation and their action against harmful fungi.

Also known is the compound III (US Pat. No. 3,957,847; common name: Cymoxanil), its preparation and its action against harmful fungi.

With a view to reducing the application rates and improving the spectrum of action of the known compounds, the present invention was based on mixtures which, with a reduced total amount of active compounds applied, have an improved activity against harmful fungi (synergistic mixtures).

We have found that this object is achieved by the mixtures defined at the outset. It has also been found that, when the compounds I, II and / or III are used jointly or separately, or when the compounds I, II and III are used in succession, harmful fungi can be controlled more effectively than with the individual compounds.

The present invention relates to mixtures of compounds I and II or I and III and mixtures which contain a compound I, a compound II and a compound III.

The general formula I is particularly representative of oxime ethers in which X is oxygen and Y is CH or X is amino and Y is N,

In addition, compounds I are preferred in which Z represents oxygen.

Likewise preferred are compounds I in which R 'is alkyl or benzyl. With regard to their use in the synergistic mixtures according to the invention, the compounds I listed in the following tables are particularly preferred:

Table 1.

Compounds of the formula IA in which ZR 'for each compound corresponds to one row of Table A.

Table 2. Compounds of the formula IB, in which ZR 'for each compound corresponds to one row of Table A.

Table A:

The compounds of the formula I can be present in the E or Z configuration with respect to the C = Y double bond (with respect to the carboxylic acid function). Accordingly, they can be used in the mixture according to the invention either as a pure E or Z isomer or as an E / Z isomer mixture. The E / Z isomer mixture or the E isomer is preferably used, the E isomer being particularly preferred.

The C = N double bonds of the oxime ether groups in the side chain of the compounds I can each be present as pure E or Z isomers or as E / Z isomer mixtures. The compounds I can be used both as isomer mixtures and as pure isomers in the mixtures according to the invention. In view of their use, compounds I are particularly preferred in which the terminal oxime ether grouping of the side chain is in the cis configuration (OCH ₃ group to ZR ').

Because of their basic character, the compounds I and III are able to form salts or adducts with inorganic or organic acids or with metal ions.

Examples of inorganic acids are hydrohalic acids such as hydrogen fluoride, hydrogen chloride, hydrogen bromide and iodine-hydrogen, sulfuric acid, phosphoric acid and nitric acid.

Examples of suitable organic acids are formic acid, carbonic acid and alkanoic acids such as acetic acid, trifluoroacetic acid, trichloroacetic acid and propionic acid as well as glycolic acid, thiocyanic acid, lactic acid, succinic acid, citric acid, benzoic acid, cinnamic acid, oxalic acid, alkylsulfonic acids (sulfonic acids with straight-chain acids or sulfonic acids with straight-chain acids) 1 to 20 carbon atoms), arylsulfonic acids or disulfonic acids (aromatic radicals such as phenyl and naphthyl which carry one or two sulfonic acid groups), alkylphosphonic acids (phosphonic acids with straight-chain or branched alkyl radicals with 1 to 20 carbon atoms), Arylphosphonic acids or diphosphonic acids (aromatic radicals such as phenyl and naphthyl which carry one or two phosphoric acid radicals), where the alkyl or aryl radicals can carry further substituents, for example p-Toluenesulfonic acid, salicylic acid, p-aminosalicylic acid, 2-phenoxybenzoic acid, 2-acetoxybenzoic acid, etc., into consideration.

In particular, the ions of the elements of the second main group, in particular calcium and magnesium, the third and fourth main group, in particular aluminum, tin and lead, and the first to eighth subgroups, come in particular as metal ions Consideration. The metal ions of the elements of the subgroups of the fourth period are particularly preferred. The metals can be present in the various valences that they have.

When preparing the mixtures, preference is given to using the pure active ingredients I and II or III, which, depending on the need, are admixed with further active ingredients against harmful fungi or other pests such as insects, arachnids or nematodes, or else herbicidal or growth-regulating active ingredients or fertilizers can.

The mixtures of the compounds I, II and III or the simultaneous joint or separate use of the compounds I, II and III are distinguished by an excellent action against a broad spectrum of phytopathogenic fungi, in particular from the class of the Ascomycetes, Deuteromycetes, Phycomycetes and Basidiomycetes. They are partly systemically effective and can therefore also be used as leaf and soil fungicides.

They are of particular importance for combating a large number of fungi on various crop plants such as cotton, vegetable plants (for example cucumbers, beans and pumpkin plants), barley, grass, oats, coffee, corn, fruit plants, rice, rye, soybeans, wine, wheat , Ornamental plants, sugar cane and a variety of seeds.

They are particularly suitable for combating the following phytopathogenic fungi: Erysiphe graminis (powdery mildew)

Cereals, Erysiphe cichoracearum and Sphaerotheca fuliginea on pumpkin plants, Podosphaera leucotricha on apples, Puccinia species on cereals, Rhizoctonia species on cotton, rice and lawn, Ustilago species on cereals and sugar cane, Venturia inaegualis (scab), apples Species on cereals, Septoria nodorum on wheat, Botrytis cinera (gray mold) on strawberries, vegetables, ornamental plants and vines, Cercospora arachidicola on peanuts, Pseudocercosporella herpotrichoides on wheat and barley, Pyricularia oryzae on rice, Phytophthora infestans on Kar¬ potatoes and tomatoes, Pseudoperonospora species on pumpkin plants and hops, Plasmopara viticola on vines, Alternaria species on vegetables and fruit, and Fusarium and Verticillium species.

They can also be used in material protection (eg wood protection), for example against Paecilomyces variotii. The compounds I, II and / or III can be applied at the same time together or separately or in succession, the sequence in the case of separate application generally not having any effect on the success of the control measures.

The compounds I and II are usually used in a weight ratio of 200: 1 to 0.1: 1, preferably 100: 1 to 1: 1, in particular 50: 1 to 5: 1 (II: I).

The compounds I and III are usually used in a weight ratio of 10: 1 to 0.1: 1, preferably 5: 1 to 0.2: 1, in particular 3: 1 to 1: 3 (III: I).

Depending on the type of effect desired for the compounds I, the application rates of the mixtures according to the invention are in general from 0.005 to 0.5 kg / ha, preferably 0.01 to 0.5 kg / ha, in particular 0.01 to 0.3 kg / Ha.

The application rates for the compounds II are generally 0.1 to 10 kg / ha, preferably 0.5 to 5 kg / ha, in particular 1 to 4 kg / ha.

The application rates for the compounds III are generally 0.005 to 0.8 kg / ha, preferably 0.01 to 0.5 kg / ha, in particular 0.05 to 0.3 kg / ha.

In the case of seed treatment, application rates of the mixture of 0.001 to 100 g / kg of seed, preferably 0.01 to 50 g / kg, in particular 0.01 to 10 g / kg, are generally used.

If pathogenic harmful fungi are to be combated for plants, the compounds I and II or III or the mixtures of the compounds I, II and III are applied separately or together by spraying or dusting the seeds, the plants or the soil before or after sowing the plants or before or after emergence of the plants.

The fungicidal synergistic mixtures according to the invention or the compounds I, II and III can be used, for example, in the form of directly sprayable solutions, powders and suspensions or in the form of high-strength aqueous, oily or other suspensions, dispersions, emulsions, oil dispersions, pastes, dusts, Spreading agents or granules are prepared and applied by spraying, atomizing, dusting, scattering or pouring. The form of application depends on the intended use; in any case, it should be as fine and ensure uniform distribution of the mixture according to the invention.

The formulations are prepared in a manner known per se, e.g. by adding solvents and / or carriers. Inert additives such as emulsifiers or dispersants are usually added to the formulations.

The alkali, alkaline earth, ammonium salts of aromatic sulfonic acids, e.g. Lignin-,

Phenolic, naphthalene and dibutylnaphthalenesulfonic acid, as well as fatty acids, alkyl and alkylarylsulfonates, alkyl, lauryl ether and fatty alcohol sulfates, as well as salts of sulfated hexa-, hepta- and octadecanols or fatty alcohol glycol ethers, condensation products of sulfonated naphthalene and its derivatives aldehyde, condensation products of naphthalene or of naphthalenesulfonic acids with phenol and formaldehyde, polyoxyethylene octylphenol ether, ethoxylated isooctyl, octyl or nonylphenol, alkylphenol or tributylphenyl polyglycol ether, alkylaryl polyether alcohols, isotridecyl ethoxylated ethoxylated ethoxylated ethoxylated ethoxylated alcohol, fatty alcohol ethoxylated, fatty alcohol ethoxylated, fatty alcohol ethoxylated, fatty alcohol ethoxylated, fatty alcohol ethoxylated, fatty alcohol ethoxylated, , Lauryl alcohol polyglycol ether acetate, sorbitol ester, lignin sulfite waste liquor or methyl cellulose.

Powders, materials for spreading and dusts can be prepared by mixing or grinding the compounds I, II and / or III together or the mixture of the compounds I, II and III with a solid carrier.

Granules (e.g. coating, impregnation or homogeneous granules) are usually produced by binding the active ingredient or ingredients to a solid carrier.

Mineral earths such as silica gel, silicas, silica gels, silicates, talc, kaolin, limestone, lime, chalk, boluses, loess, clay, dolomite, diatomaceous earth, calcium and magnesium sulfate, magnesium oxide, ground plastics serve as fillers or solid carriers, for example. and fertilizers such as ammonium sulfate, ammonium phosphate, ammonium nitrate, ureas and vegetable products such as cereal flour, tree bark, wood and nutshell flour, cellulose powder or other solid carriers.

The formulations generally contain 0.1 to 95% by weight, preferably 0.5 to 90% by weight, of the compounds I and II or III or the mixture of the compounds I, II and III. The active ingredients are in a purity of 90% to 100%, θ preferably 95% to 100% (according to the NMR or HPLC spectrum).

The compounds I, II and / or III or the mixtures or the corresponding formulations are used by adding a fungicidally effective amount of the harmful fungi, the plants, seeds, soil, surfaces, materials or spaces to be kept free of them Mixture, or the compounds I, II and / or III treated separately. The application can take place before or after the infestation by the harmful fungi.

Examples of the synergistic effect of the mixtures according to the invention against harmful fungi.

The fungicidal activity of the compound and the mixtures can be demonstrated by the following tests:

The active ingredients are separated or together as a 10% emulsion in a mixture of 70% by weight cyclohexanone, 20% by weight Nekanil® LN (Lutensol® AP6, wetting agent with emulsifying and

Dispersing effect based on ethoxylated alkylphenols) and 10 wt .-% Emulphor® EL (Emulan® EL, emulsifier based on ethoxylated fatty alcohols) prepared and diluted with water according to the desired concentration.

The evaluation is carried out by determining the affected leaf areas in percent. These percentages were converted into efficiencies. The expected efficacies of the active ingredient mixtures are calculated according to the Colby formula [R.S. Colby, Weeds 15, 20-22 (1967)] and compared with the observed efficiencies.

Colby formula:

E = x + y + z -x-yz / 100

E expected efficiency, expressed in% of the untreated control, when using the mixture of active ingredients A, B and C in concentrations a, b and c

the efficiency, expressed in% of the untreated control, when using the active ingredient A in the concentration a y the efficiency, expressed in% of the untreated

Control when using the active ingredient B in the concentration b

z the efficiency, expressed in% of the untreated

Control when using the active ingredient C in the concentration c

Efficiency (E) is calculated using Abbot's formula as follows:

W = (1 - α) »100 / ß

α corresponds to the fungal attack of the treated plants in% and

corresponds to the fungal attack of the untreated (control) plants in%

With an efficiency of 0, the infection of the treated plants corresponds to that of the untreated control plants; with an efficiency of 100, the treated plants are not infected.

Examples 1-14 Activity against Plasmopara viticola

Leaves of potted vines of the "Müller-Thurgau" variety were sprayed to runoff point with aqueous active ingredient preparation which was prepared with a stock solution of 10% active ingredient, 63% cyclohexanone and 27% emulsifier. In order to be able to assess the long-term effect of the substances, the plants were placed in the greenhouse for 7 days after the spray coating had dried on. Only then were the leaves incubated with an aqueous suspension of zoospores from Plasmopara viticola. The vines were then placed for 48 hours in a water vapor-saturated chamber at 24 ° C. and then for 5 days in the greenhouse at temperatures between 20 and 30 ° C. After this time, the plants were again placed in a humid chamber for 16 hours in order to accelerate the outbreak of sporangium carriers. The extent of the development of the infestation on the undersides of the leaves was then determined visually. Table 3;

Table 4:

★ calculated according to Colby Examples 15-33

Efficacy against Phytophthora infestans on tomatoes

Leaves of potted plants of the "large meat tomato" type were sprayed to runoff point with an aqueous suspension which was prepared from a stock solution of 10% active ingredient, 63% cyclohexanone and 27% emulsifier. The following day, the leaves were infected with an aqueous suspension of zoospores from phytophthora infestans. The plants were then placed in a water vapor-saturated chamber at temperatures between 16 and 18 ° C. After 6 days, the blight on the untreated but infected control plants had developed so strongly that the infestation could be determined visually in%.

Table 5:

Table 6;

Examples 34-40

Curative activity against Plasmopara viticola

Leaves of potted vines of the "Müller-Thurgau" variety were inoculated with an aqueous suspension of zoospores from Plasmopara viticola. The vines were then placed in a steam-saturated chamber at 22-24 ° C for 48 hours. They were then removed from the chambers and, after drying, were sprayed to runoff point with aqueous preparation of active compound, which was prepared with a stock solution of 10% active compound, 63% cyclohexanone and 27% emulsifier. After the spray coating had dried on, the plants were further cultivated for 5 days in a greenhouse at temperatures between 20 and 30 ° C. After this time, the plants were again placed in a humid climatic chamber for 16 hours in order to accelerate the outbreak of sporangium carriers. The extent of the development of the infestation on the undersides of the leaves was then determined visually.

Table 7:

Table 8:

* 'calculated according to the Colby formula

The results of the examples show that the observed efficiency in all mixture ratios is higher than the efficiency calculated in advance by the Colby formula.

Claims

1. Fungicidal mixture containing

a) an oxime ether of the formula I,

in which the substituents have the following meaning:

X is oxygen or amino (NH);

Y is CH or N;

Z is oxygen, sulfur, amino (NH) or C 1 -C ₄ alkylamino (N -C 1 -C ₄ alkyl);

R 'Ci-Cε-alkyl, Ci-Cβ-haloalkyl, C ₃ -C ₆ alkenyl, C ₂ -C ₆ haloalkenyl, C ₃ -C ₆ alkynyl, Ca-Cε-haloalkynyl, C ₃ -C _6- Cycloalkyl-methyl, or benzyl, which can be partially or completely halogenated and / or can carry one to three of the following radicals: cyano, -CC ₄ alkyl, -C-C ₄ haloalkyl, -C-C ₄ alkoxy , -C-C ₄ haloalkoxy and -C-C ₄ alkylthio;

and

b) a dithiocarbamate (II) selected from the group

- Manganese ethylene bis (dithiocarbamate) (zinc complex)

(Ha), - manganese ethylene bis (dithiocarbamate) (llb),

- Zinc ammonium ethylenebis (dithiocarbamate) (IIc) and

- Zinc ethylene bis (dithiocarbamate) (Ild), and / or

c) 1- (2-cyano-2-methoxyiminoacetyl) -3-ethyl urea (III)

H ₃ CCH ₂ -NHCONH-C (CN) = NOCH ₃ (III)

in a synergistically effective amount.

, Fungicidal mixture according to claim 1, containing manganese-ethylene bis (dithiocarbamate) (zinc complex) (Ila). 3. Fungicidal mixture according to claim 1, containing manganese ethylenic bis (dithiocarbamate) (IIb).

4. Fungicidal mixture according to claim 1, containing zinc ammonium ethylenebis (dithiocarbamate) (IIc).

5. Fungicidal mixture according to claim 1, containing zinc ethylene bis (dithiocarbamate) (Ild).

6. Fungicidal mixture according to claim 1, containing a compound II and the compound III.

7. Fungicidal mixture according to claim 1, characterized in that the weight ratio of compound II to compound I is 200: 1 to 0.1: 1.

8. A method of combating harmful fungi, characterized gekenn¬ characterized in that the harmful fungi, their habitat or the plants, seeds, soils, surfaces, materials or spaces to be kept free of them with a compound of formula I according to claim 1 and a compound of formula II and / or a compound of formula III according to claim 1.

9. The method according to claim 8, characterized in that one uses 0.005 to 0.5 kg / ha of a compound I.

10. The method according to claim 8, characterized in that 0.1 to 10 kg / ha of a compound II is used.