KR20060126564A - Fungicide mixtures - Google Patents

Abstract

The invention relates to fungicide mixtures containing 1) a triazolopyrimidine derivative of formula (I), and 2) fenpropidin of formula (II), as active ingredients, in a synergistically active quantity. The invention also relates to methods for controlling pathogenic fungi with mixtures of compound I and compound II, to the use of compound I and compound II for producing such mixtures, and to products containing the inventive mixtures.

Description

Fungicidal mixtures {FUNGICIDE MIXTURES}

The present invention relates to a fungicidal mixture comprising, as an active ingredient, a triazolopyrimidine derivative of formula (I) and fenpropidine of formula (II) in a synergistically effective amount.

The present invention also relates to a method for controlling harmful fungi using mixtures of compounds of formulas (I) and (II), the use of compounds of formulas (I) and (II) for the preparation of such mixtures and compositions comprising said mixtures.

Compound of Formula I, 5-chloro-7- (4-methylpiperidin-1-yl) -6- (2,4,6-trifluorophenyl)-[1,2,4] triazolo [1 , 5-a] -pyrimidine, methods for its preparation and activity against harmful fungi are known from WO 98/46607.

Compounds of formula (II), 1- [3- (4-tert-butylphenyl) -2-methylpropyl] piperidine, methods for their preparation and activity against harmful fungi are likewise described in DE-OS 27 52 096; US 4 202 894; common name phenpropidine).

Mixtures of triazolopyrimidines with other active compounds are known in a general manner from EP-A 988 790 and US 6 268 371.

The synergistic mixtures described in EP-A 988 790 have been described as fungicidally active against various diseases of cereals, fruits and vegetables, especially ringworm on wheat and barley or gray mold of apples. The mixtures described in US 6 268 371 are described as particularly fungicidally active against rice germs. However, the fungicidal activity against harmful fungi derived from Oomycetes family of these mixtures is not satisfactory.

The biological behavior of omicetes is clearly different from that of the Ascomycetes , Deuteromycetes and Basidiomycetes families , which are related more closely to algae than to fungi. Because of this. Thus, what is known about the fungicidal activity of active compounds against sedative fungi, such as ascomycetes, deuteromicetes and vasidomycetes, can only be very limitedly applied to omicetes.

Omisettes causes economically related losses to various crops. In many regions, infections with Phytophthora infestans are most important for plant diseases in the cultivation of potatoes and tomatoes. In grape cultivation, significant losses are due to the peronospora of grapevines.

It has been shown in practical agricultural experience that the application of repeated and exclusive individual active compounds in the control of harmful fungi leads to the rapid selection of fungal strains which in many cases have natural or converted resistance to the active compound in question. Effective control of the fungus with the active compound in question is then no longer possible.

In order to reduce the risk of selection of resistant fungal strains, mixtures of different active compounds are preferably used to control harmful fungi in recent years. By combining active compounds with different mechanisms of action, it is possible to ensure successful control for a relatively long time.

It is an object of the present invention to improve the activity against harmful fungi with a reduced total dose of the active compound at the lowest possible application rate for the effective control and effective resistance management of phytopathogenic harmful fungi, in particular of Omicetes-derived harmful fungi. To provide a mixture.

The inventors have found that this object is achieved by the mixture initially defined. In addition, the inventors have found that the application of the compounds of the formulas (I) and (II) simultaneously, ie together or separately, or the successive application of the compounds of the formulas (I) and (II) allows for better control of harmful fungi than is possible with the individual compounds. Was found (synergistic mixture).

Mixtures of the compounds of the formulas (I) and (II), or used simultaneously, ie together or separately, are compounds of the broad range of phytopathogenic fungi, in particular of asomycetes, deuteromicetes, oomycetes and bacidiomycetes. It is characterized by excellent activity against fungi. They can be used as leaf or soil-acting fungicides for crop protection.

These include various crops such as bananas, cotton, vegetables (such as cucumbers, beans, and gourds), barley, grass, oats, coffee, potatoes, corn, fruit plants, rye, soya, tomatoes, grapevines, Of particular importance in the control of various fungi on wheat, ornamental plants, sugar cane and especially rice, and numerous seeds.

They are particularly suitable for the control of the following phytopathogenic fungi:

Grain of Blumeria graminis ( Blumeria graminis ), gourd, Erysiphe cichoracearum ) and Sphaerotheca ( Sphaerotheca) fuliginea), vine spare La Cote richa kind of apple (Podosphaera leucotricha), unsi of vines Cronulla Neka Tor (Uncinula necator ), Puccinia species of cereals, Rhizoctonia species of cotton, rice and grass, Ustilago species of cereals and sugar cane, Venturia inaequalis of apples , Bipolaris and Drechslera species in cereals, rice and grass, Septoria in wheat, Berries, vegetables, ornamental plants and Bovinetis cinerea in grapevines cinerea), bananas, peanuts and pseudo Serre course Mikko spare Relais (Mycosphaerella) kind of grain, wheat, and barley Po Koh des Relais Herzegovina Portree (Pseudocercosporella herpotrichoides ), Pyricularia oryzae of rice, Phytophthora infestans of potatoes and tomatoes, Pseudoperonospora species of gourds and hops, Plasmoparabita of grapevines Coke ( Plasmopara viticola), vegetables and altereuna Ria (Alternaria) kinds of fruit, and also Fusarium (Fusarium) and Verbier tisil Leeum (Verticillium) species.

They are caused by omycetes-derived harmful fungi on various crops such as vegetable species (for example cucumbers, kidney beans and gourds), in particular due to the foliar disease and Plasmopara viticola of tomatoes and potatoes due to phytophthora infestans. Particularly suitable for the control of Downy mildew in grapes (feronospora of grape vines).

They are also used for the protection of substances (for example for the protection of wood), such as Paecilomyces variotii ) can be used for protection.

The compounds of formulas (I) and (II) may be applied simultaneously, ie together or separately, or the compounds of formulas (I) and (II) may be applied in succession and in the case of separate applications the order generally does not have any effect on the results of the control measures.

In the preparation of the mixture, if necessary, to the pure active compounds of the formulas (I) and (II), additional compounds active against harmful fungi or other pests such as insects, arachnids or nematodes, or active compounds or fertilizers for herbicidal or growth control are added. can do.

Other suitable active compounds in the sense are especially active compounds selected from the group:

Acylalanine, such as bennalaxyl, opurase or oxadixyl,

Amine derivatives, such as aldimorphs, dodemorphs, guaztines, iminotadines or tridemorphs,

Anilinopyrimidines such as pyrimethanyl, mepanipyrim or cipyrrodinyl,

Antibiotics such as cycloheximide, griseofulvin, kasugamycin, natamycin, polyoxine or streptomycin,

Azoles, such as bitteranol, bromoconazole, ciproconazole, diphenoconazole, dinitroconazole, enylconazole, epoxyconazole, fenbuconazole, fluquinconazole, flusilazole, flutriafol, Hexaconazole, imazaryl, ipconazole, metconazole, miclobutanyl, fenconazole, propicosol, prochloraz, prothioconazole, simeconazole, tetraconazole, triadimefon, tri Adimenol, triflumisol or triticazole,

Dicarboxymides such as myclozoline, procmidone,

Dithiocarbamates, such as ferbam, nabam, metham, propineb, polycarbamate, zeram or geneb,

Heterocyclic compounds such as anilazine, boscalid, oxycarboxycin, cyazopamide, dazomet, phamoxadon, phenamidone, fuberidazole, flutolanyl, furamepyr, isoprothiolan, methi Pronyl, noarimol, probenazole, pyroquilon, silthiofam, thibendazole, tifluzamide, thiadinil, tricyclazole or tripolin,

Nitrophenyl derivatives, such as vinapacryl, dinobutone or nitrophthalisopropyl,

Other fungicides, such as acibenzola-S-methyl, carpropamide, cyflufenamide, simoxanyl, diclomezin, diclocimet, dietofencarb, edifeneforce, etaboxam, fentin acetate , Phenoxanyl, perimzone, phosphetyl, hexachlorobenzene, metraphenone, propamocarb, phthalide, toloclofos-methyl, quintogen or oxamide,

Strobilurins such as fluoxastrobin, metominostrobin, orissastrobin, pyraclostrobin,

Sulfenic acid derivatives, such as captapol,

Cinnamid or homologous compounds, such as flumetober.

In one embodiment of the mixture according to the invention, additional fungicide III or two fungicides III and IV are added to the compounds of formulas I and II. Preferred are mixtures of the compounds of formulas (I) and (II) with component III. Particular preference is given to mixtures of compounds of the formulas (I) and (II).

In a further preferred embodiment of the mixture according to the invention, fungicide III is an azole fungicide.

The compounds of the formulas (I) and (II) are applied simultaneously, ie together or separately or successively. When applied separately, the order of application generally has no effect on the outcome of the response.

Usually, the compounds of the formulas (I) and (II) are applied in a weight ratio of 100: 1 to 1: 100, preferably 20: 1 to 1:20, in particular 10: 1 to 1:10.

Component III and, if necessary, IV are added to the compound of formula I in a ratio of 20: 1 to 1:20.

Depending on the type of compound and the desired effect, the application rate of the mixtures according to the invention is 5 to 1000 g / ha, preferably 50 to 900 g / ha, in particular 50 to 750 g / ha.

Correspondingly, the application rate of the compounds of the formula I is generally 1 to 1000 g / ha, preferably 10 to 900 g / ha, in particular 20 to 750 g / ha.

Correspondingly, the application rate of the compounds of the formula (II) is generally 1 to 1000 g / ha, preferably 10 to 500 g / ha, in particular 40 to 350 g / ha.

In seed treatment, the application rate of the mixture is generally from 1 to 1000 g, preferably from 1 to 200 g and in particular from 5 to 100 g per 100 kg of seed.

In the control of harmful fungi, the application of the compounds of the formulas (I) and (II) or mixtures of the compounds of the formulas (I) and (II) separately, or together, may be applied to seeds, plants or soil before or after planting or seeding. By spraying or spraying. Application of the compound is preferably carried out by spraying leaves.

The mixtures according to the invention, or the compounds of the formulas (I) and (II), can be converted into conventional preparations, for example solutions, emulsions, suspensions, dusts, powders, pastes and granules. The form of use depends on the specific purpose; In each case they must disperse the compound according to the invention finely and uniformly.

Such formulations may be prepared in a known manner, for example by extending the active compound into a solvent and / or carrier, if necessary using emulsifiers and dispersants. Suitable solvents / adjuvant for this purpose are essentially

Water, aromatic solvents (for example from Solvesso, xylene), paraffins (for example mineral oil fractions), alcohols (for example methanol, butanol, pentanol, benzyl alcohol), ketones (for example cyclo Hexanone, gamma-butyrolactone), pyrrolidone (NMP, NOP), acetates (glycol diacetate), glycols, fatty acid dimethylamides, fatty acids and fatty acid esters (in principle, solvent mixtures may be used),

Carriers such as ground natural minerals (eg kaolin, clay, talc, chalk) and ground synthetic minerals (eg highly dispersed silica, silicates); Emulsifiers such as nonionic and anionic emulsifiers (eg polyoxyethylene fatty alcohol ethers, alkylsulfonates and arylsulfonates) and dispersants such as lignosulphite waste liquors and methylcellulose.

Suitable surfactants include alkali metals, alkaline earth metal and ammonium salts, alkylarylsulfonates, alkyl sulfates, alkylsulfonates, fatty alcohol sulfates, fatty acids and sulfates of lignosulfonic acid, naphthalenesulfonic acid, phenolsulfonic acid and dibutylnaphthalenesulfonic acid Fatty alcohol glycol ethers, also condensates of sulfonated naphthalene and naphthalene derivatives with formaldehyde, condensates of naphthalene or naphthalenesulfonic acid with phenols and formaldehyde, polyoxyethylene octylphenol ethers, ethoxylated isooctylphenols, octylphenols, nonylphenols , Alkylphenol polyglycol ether, tributylphenyl polyglycol ether, tristearylphenyl polyglycol ether, alkylaryl polyether alcohol, alcohol and fatty alcohol / ethylene oxide condensate, ethoxylated castor oil, polyoxyethylene alkyl ether, ethoxy Misfired polyoxypropylene, lauryl alcohol Polyglycol ether acetal, sorbitol ester, lignosulphite waste liquor and methylcellulose.

Suitable materials for the preparation of immediately sprayable solutions, emulsions, pastes or oil dispersions are mineral oil fractions with medium to high boiling points, such as kerosene or diesel oils, also coal tar oils, and vegetable or animal oils, aliphatic, cyclic and aromatic Hydrocarbons such as toluene, xylene, paraffin, tetrahydronaphthalene, alkylated naphthalene or derivatives thereof, methanol, ethanol, propanol, butanol, cyclohexanol, cyclohexanone, isophorone, high polar solvents such as dimethyl sulfoxide Seed, N-methylpyrrolidone and water.

Powders, spraying materials and sprayable products can be prepared by mixing or co-milling the active materials with solid carriers.

Granules, for example coated granules, impregnated granules and homogeneous granules, can be prepared by binding the active compounds to solid carriers. Examples of solid carriers are mineral soils such as silica gel, silicates, talc, kaolin, atclay, limestone, lime, chalk, church clay, ocher, clay, dolomite, diatomaceous earth, calcium sulfate, magnesium sulfate, magnesium oxide, Ground synthetic materials, fertilizers such as ammonium sulfate, ammonium phosphate, ammonium nitrate or urea, and products of plant origin such as grain flour, bark flour, wood flour and nut shell flour, cellulose powder and other solid carriers.

In general, the preparations comprise from 0.01 to 95% by weight of the active compound, preferably from 0.1 to 90% by weight. The active compound is used with a purity (according to the NMR spectrum) of 90 to 100%, preferably 95 to 100%.

Examples of such agents are as follows:

1. Product diluted with water

(A) Water Soluble Concentrate (SL)

10 parts by weight of the active compound are dissolved in water or an aqueous solvent. Alternatively, wetters or other auxiliaries are added. The active compound dissolves upon dilution with water.

(B) Dispersible Concentrates (DC)

20 parts by weight of the active compound are dissolved in cyclohexanone with the addition of a dispersant, for example polyvinylpyrrolidone. Dilution with water gives a dispersion.

(C) Emulsifiable Concentrates (EC)

15 parts by weight of the active compound are dissolved in xylene with the addition of calcium dodecylbenzenesulfonate and castor oil ethoxylate (each 5% concentration). Dilution with water gives an emulsion.

(D) emulsions (EW, EO)

40 parts by weight of the active compound are dissolved in xylene with the addition of calcium dodecylbenzenesulfonate and castor oil ethoxylate (each 5% concentration). This mixture is introduced in water by an emulsifier (Ultraturax) and made into a homogeneous emulsion. Dilution with water gives an emulsion.

(E) Suspension (SC, OD)

In a stirred ball mill, 20 parts by weight of the active compound together with the addition of a dispersant, a wetting agent and water or an organic solvent are ground to obtain a fine active compound suspension. Dilution with water gives a stable suspension of the active compound.

(F) Water Dispersible Granules and Water Soluble Granules (WG, SG)

50 parts by weight of the active compound together with the addition of dispersing and wetting agents are ground and made into water-dispersible or water-soluble granules using a machine (eg extrusion, spray tower, fluidized bed). Dilution with water gives a stable dispersion or solution of the active compound.

(G) Water Dispersible Powders and Water Soluble Powders (WP, SP)

75 parts by weight of the active compound are ground in a rotor-stator mill with addition of dispersant, wetting agent and silica gel. Dilution with water gives a stable dispersion or solution of the active compound.

2. Products applied without dilution

(H) Sprayable Powder (DP)

5 parts by weight of the active compound is ground and mixed with 95% of finely divided kaolin. This yields a spartable product.

(i) granules (GR, FG, GG, MG)

0.5 parts by weight of the active compound is ground and combined with 95.5% of the carrier. Current methods include extrusion, spray-drying or fluidized beds. This gives granules that are applied without dilution.

(J) ULV Solution (UL)

10 parts by weight of the active compound are dissolved in an organic solvent such as xylene. This yields a product that is applied without dilution.

The active compound is in its preparation form or in the form of use prepared therefrom, for example in the form of a directly sprayable solution, powder, suspension or dispersion, emulsion, oil dispersion, paste, sprayable product, material for spraying or granules. It can be used by spraying, atomizing, spraying, spraying or pouring. The form of use depends entirely on the intended purpose; In each case it is intended to maximize the microdispersion of the active compound according to the invention.

Aqueous use forms can be prepared by adding water to emulsion concentrates, pastes or wettable powders (sprayable powders, oil dispersions). To prepare emulsions, pastes or oil dispersions, the material may be dissolved as is or in an oil or solvent and homogenized in water using wetting agents, tackifiers, dispersants or emulsifiers. Alternatively, concentrates can be prepared which consist of the active substance, wetting agent, tackifier, dispersant or emulsifier and, where appropriate, the solvent or oil, which concentrate is suitable for dilution with water.

The concentration of active compound in ready-to-use preparations can vary widely. Generally, the concentration is 0.0001 to 10%, preferably 0.01 to 1%.

The active compounds can also be used very successfully in ultra-low volume (ULV) processes, and therefore can be employed formulations comprising more than 95% by weight of active compound, or even without additives.

If appropriate, various types of oils, wetting agents, adjuvants, herbicides, fungicides, other pesticides or fungicides may be added to the active compound immediately before use (tank mix). Such agents may be mixed in the formulations according to the invention in a weight ratio of usually 1:10 to 10: 1.

The compounds, mixtures or corresponding preparations of formula (I) or (II) are formulated with an effective amount of the fungicidal mixture, or when separately applied to plants, seeds, soil, areas, substances or spaces which are intended to remain free of harmful fungi or harmful fungi. It is applied by treatment with an effective amount of the fungicidal compound of II. Application can be done before or after infection with harmful fungi.

Fungicidal activity of compounds and mixtures can be explained by the following experiments:

The active compounds were prepared separately or together in a stock solution of 0.25% by weight of active compound in acetone or DMSO. To the solution was added 1% by weight of the emulsifier Uniperol® EL (wetting agent based on ethoxylated alkylphenols with emulsifying and dispersing activity) and the solution was diluted with water to the desired concentration.

Use Example-Activity against Peronospora of Grape Vine Induced by Plasmopara Viticola

Vine leaves of the pollen plant variety "Riesling" were sprayed until an aqueous suspension with the active compound concentrations described below was run down. The following day, the lower surface of the leaf was infected with an aqueous drunken suspension of Plasmopara viticola. The vines were then initially left for 48 hours in a steam-saturation chamber at 24 ° C. and then at 20-30 ° C. for 5 days in a greenhouse. After this period, the plants were left to rest for 16 hours in a humid chamber to palpate the vesicular rash rash. The incidence of disease on the underside of the leaf was then visually determined.

Visually determined percentage of infected leaf area converted to% efficacy of untreated control.

Efficacy (E) was calculated using the following Abbot formula.

α is the percentage of fungal infections of treated plants,

β is the percentage of fungal infections in untreated (control) plants.

Efficacy 0 means that the infection level of the treated plant corresponds to that of the untreated control plant; Efficacy 100 means that the treated plant is not infected.

The expected efficacy of the mixture of active compounds is determined and observed using the following Colby formula (SR Colby, (Calculating synergistic and antagonistic responses of herbicide combinations), Weeds 15, 20-22 (1967)). Compared with the established efficacy.

Colby Formula:

E is expressed in% as the expected efficacy of the untreated control when using a mixture of active compounds A and B at concentrations a and b,

x is expressed in% as the efficacy of the untreated control when using active compound A at concentration a,

y is expressed in% as the potency of the untreated control when using active compound B at concentration b.

Individual active compounds Example Active compound Concentration of active compound in spraying liquid [ppm] % Efficacy of untreated control One Control (untreated) - (90% infection) 2 I 16 4 67 56 3 II (phenpropidine) 16 4 0 0

Mixture according to the invention Example Mixture Concentration Mixing Ratio of Active Compounds Observed efficacy Calculated efficacy ^* ) 4 I + II 16 + 4 ppm 4: 1 92 67 5 I + II 16 + 16 ppm 1: 1 97 67 6 I + II 4 + 16 ppm 1: 4 89 56

*) Efficacy calculated using Colby's formula

The test results showed that the observed efficacy of the mixtures according to the invention for Plasmopara biticola due to the strong synergistic effect was significantly higher than predicted using Colby's formula at all mixing ratios.

Claims (10)

A fungicidal mixture for controlling harmful fungi comprising a triazolopyrimidine derivative of formula (I) and fenpropidine of formula (II) in a synergistically effective amount. <Formula I>

<Formula II>

The fungicidal mixture of claim 1 comprising the compound of Formula I and the compound of Formula II in a weight ratio of 100: 1 to 1: 100. A composition comprising the mixture of claims 1 or 2 and a liquid or solid carrier. A method of controlling harmful fungi comprising treating fungi, their habitat, seeds, soil, or plants to be protected from fungal attack with an effective amount of a compound of formula (I) and a compound of formula (II) according to claim 1. The process according to claim 4, wherein the compounds of the formulas (I) and (II) according to claim 1 are applied simultaneously, ie together or separately, or in succession. The process according to claim 4, wherein the mixture according to claim 1 or 2 is applied in an amount of 5 g / ha to 1000 g / ha. The method according to any one of claims 4 to 6, wherein harmful fungi derived from omicetes are controlled. The method according to claim 4 or 5, wherein the mixture according to claim 1 or 2 is applied in an amount of 1 to 1000 g per 100 kg of seeds. Seed comprising the mixture according to claim 1 in an amount of 1 to 1000 g per 100 kg of seed. Use of a compound of formula (I) and formula (II) according to claim 1 for the preparation of a composition suitable for controlling harmful fungi.