EP1722632A1

EP1722632A1 - Fungicide mixtures for controlling rice pathogens

Info

Publication number: EP1722632A1
Application number: EP05707538A
Authority: EP
Inventors: Jordi Tormo I Blasco; Thomas Grote; Maria Scherer; Reinhard Stierl; Siegfried Strathmann; Ulrich Schöfl
Original assignee: BASF SE
Current assignee: BASF SE
Priority date: 2004-02-26
Filing date: 2005-02-19
Publication date: 2006-11-22
Also published as: EA200601453A1; TW200533292A; BRPI0508032A; CN1917765A; US20070161655A1; IL176929A0; NO20063992L; ZA200607945B; AR048417A1; CA2554430A1; KR20070007806A; JP2007523933A; WO2005082146A1

Abstract

The invention relates to fungicide mixtures for controlling pathogenic fungi, said mixtures containing 1) the triazolopyrimidine derivative of formula (I), and 2) dichlofluanide of formula (II), as active constituents in a synergistically active quantity. The invention also relates to methods for controlling plant pathogenic fungi using mixtures of compound (I) and compound (II), to the use of compounds (I) and (II) for producing such mixtures, and to agents containing said mixtures.

Description

FUNGICIDAL MIXTURES FOR CONTROLLING RICE PATHOGENES

The present invention relates to fungicidal mixtures for combating harmful fungi, which contain active components

1) the triazolopyrimidine derivative of the formula I,

and

2) dichlofluanide of the formula II,

in a synergistically effective amount.

In addition, the invention relates to a method for controlling phytopathogenic harmful fungi with mixtures of the compound I with the compounds II and the use of the compound I with the compounds II for the preparation of such mixtures and agents which contain these mixtures.

The compound I, 5-chloro-7- (4-methyl-piperidin-1-yl) -6- (2,4,6-trifluorophenyl) - [1,2,4] tri-azolo [1,5 -a] pyrimidine, its preparation and its action against harmful fungi is known from the literature (WO 98/46607).

The compound II, N-dichlorofluoromethylthio-N'.N'-dimethyl-N-phenylsulfonamide, its preparation and its action against harmful fungi is also known from the literature (DE-AS 11 93498; common name dichlofluanid).

Mixtures of triazolopyrimidines with other active ingredients are known from EP-A 988 790 and US 6 268 371. The synergistic mixtures known from EP-A 988 790 are fungicidally active against various diseases of cereals, fruits and vegetables, such as. B. powdery mildew on wheat and barley or gray mold on apples. The mixtures known from US Pat. No. 6,268,371 are described as having a fungicidal action, particularly against rice pathogens.

In view of an effective control of harmful fungi with the lowest possible application rates, in particular of rice pathogens, the present invention was based on mixtures which, with a reduced total amount of active ingredients applied, have an improved activity against harmful fungi.

Accordingly, the mixtures defined at the outset were found. It has also been found that, when the compound I and the compound II are used simultaneously or separately or when the compounds I and the compound II are used in succession, harmful fungi can be controlled more effectively than with the individual compounds (synergistic mixtures).

The mixtures of the compound I and the compound II or the simultaneous joint or separate use of the compound I and the compound II are distinguished by an outstanding activity against a broad spectrum of phytopathogenic fungi, in particular from the class of the Ascomycetes, Deuteromyces, Oomycetes and Basidiomycetes. They can be used in plant protection as leaf and soil fungicides.

They are particularly important for combating a large number of fungi on various crops such as bananas, cotton, vegetables (e.g. cucumbers, beans and squashes), barley, grass, oats, coffee, potatoes, corn, fruit plants, rye, soy, tomatoes, wine , Wheat, ornamental plants, sugar cane and especially rice, and a variety of seeds.

They are of particular importance for combating harmful fungi on rice plants and on their seeds, such as Bipolaris and Drechslera species. They are particularly suitable for combating the leaf sheath disease on rice caused by Corticium sasakii. In addition, they are also highly effective against a large number of phytopathogenic fungi, such as: Blumeria graminis (powdery mildew) on cereals, Erysiphe cichoracearum and Sphaerotheca fuliginea on squash plants, Podosphaera leucotricha on apples, Uncinula necator on vines, Puccinia species , Rhizocto / 7 / a species on cotton, rice and lawn, Ustilago Aen on cereals and sugar cane, Venturia inaequalis on apples, Bipolaris and Drechslera species on cereals, rice and Lawn, Septoria nodorum on wheat, Botrytis cinerea on strawberries, vegetables, ornamental plants and vines, Mycosphaerella species on bananas, peanuts and cereals, Pseudocercosporella herpotrichoides on wheat and barley, Pyricularia oryzae on rice, Phytophthora infestans on potatoes and tomatoes, Pseudoperonosa 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 (e.g. wood protection), for example against Paecilomyces variotii.

The compound I and the compound II can be applied simultaneously 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.

In the preparation of the mixtures, preference is given to using the pure active ingredients I and II, to which, as required, 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 be admixed.

In particular, active substances selected from the following groups are possible as further active substances in the above sense:

Acylalanines such as benalaxyl, metalaxyl, ofurace, oxadixyl,

Amine derivatives such as aldimorph, dodemorph, fenpropimorph, fenpropidin, guazatine, iminoctadine, tridemorph,

Anilinopyrimidines such as pyrimethanil, mepanipyrim or cyprodinil,

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

Azoles such as bitertänol, bromoconazole, cyproconazole, difenoconazole, dinitroconazole, enilconazole, epoxiconazole, fenbuconazole, fluquiconazole, flusilazole, flutriafol, hexaconazole, imazalil, ipconazole, metconazole, prokonolol, noconazol, myazonolol, myazonolol, myazonolol, noconazole, myazonolol , Tetraconazole, tri-dimefon, triadimenol, triflumizole, triticonazole,

Dicarboximides such as myclozolin, dithiocarbamates such as ferbam, nabam, mancozeb, metam, propineb, polycarbamate, ziram, zineb,

Heterocyclic compounds such as anilazine, benomyl, boscalid, carbendazim, carboxin, oxycarboxin, cyazofamid, dazomet, dithianon, famoxadone, fenamidon, fuberidazole, flutolanil, furametpyr, isoprothiolan, mepronil, nuarimol, probenazol Pyroquilon, Quinoxyfen, Silthiofam, Thiabendazol, Thifluzamid, Tiadinil, Tricyclazol, Triforine,

Copper fungicides such as Bordeaux broth, copper acetate, copper oxychloride, basic copper sulfate, nitrophenyl derivatives such as binapacryl, dinocap, dinobutone, nitrophthal-isopropyl,

Phenylpyrroles such as fenpiclonil or fludioxonil,

• sulfur,

• Other fungicides such as acibenzolar-S-methyl, benthiavalicarb, carpropamide, chlorothalonil, cyflufenamid, cymoxanil, diclomezin, diclocymet, diethofencarb, edifenfos, ethaboxam, fenhexamide, fentin acetate, fenoxanil, namimzone, ferimzone, fluazi acid , Fosetyl, fosetyl aluminum, iprovalicarb, hexachlorobenzene, metrafenone, methyl isothiocyanate, pencycuron, propamocarb, phthalide, toloclofos-methyl, quintozene, zoxamide,

Strobilurins such as azoxystrobin, dimoxystrobin, fluoxastrobin, kresoxim-methyl, metominostrobin, orysastrobin, pyraclostrobin or trifloxystrobin,

Sulfenic acid derivatives such as Captafol, Captan, Folpet,

• Cinnamic acid amides and analogues such as dimethomorph, flumetover or flumorph.

In one embodiment of the mixtures according to the invention, a further fungicide III or two fungicides III and IV are added to the compounds I and II.

Mixtures containing the compounds I and II and a component III are preferred. Mixtures containing the compounds I and II as active components are particularly preferred.

The compound I and the compound II are usually used in a weight ratio of 100: 1 to 1: 100, preferably 20: 1 to 1:20, in particular 10: 1 to 1:10.

Components III and IV are optionally mixed in a ratio of 20: 1 to 1:20 to the compound I.

Depending on the type of compound and the desired effect, the application rates of the mixtures according to the invention are from 5 g / ha to 1500 g / ha, preferably 50 to 1000 g / ha, in particular 50 to 750 g / ha.

Accordingly, the application rates for the compound I are generally from 1 to 1000 g / ha, preferably from 10 to 900 g / ha, in particular from 20 to 750 g / ha. Correspondingly, the application rates for compound II are generally from 1 to 1500 g / ha, preferably from 10 to 1000 g / ha, in particular from 20 to 750 g / ha.

In the case of seed treatment, application rates of mixture of 1 to 1000 g / 100 kg of seed, preferably 1 to 500 g / 100 kg, in particular 5 to 100 g / 100 kg, are generally used.

When combating phytopathogenic harmful fungi, the compounds I and II (and possibly III and IV) or the mixtures of the compounds I and II (and possibly III and IV) are applied separately or together by spraying or dusting the seeds , seedlings, plants or soils before or after sowing the plants or before or after emergence of the plants. When controlling rice pathogens, the compounds are applied jointly or separately by applying granules or pollinating the soil.

The mixtures according to the invention, or the compounds I and II (and, if appropriate, III and IV) can be converted into the customary formulations, e.g. Solutions, emulsions, suspensions, dusts, powders, pastes and granules. The form of application depends on the respective purpose; in any case, it should ensure a fine and uniform distribution of the compound according to the invention.

The formulations are prepared in a known manner, e.g. by stretching the active ingredient with solvents and / or carriers, if desired using emulsifiers and dispersants. The following are essentially suitable as solvents / auxiliaries: water, aromatic solvents (for example Solvesso products, xylene), paraffins (for example petroleum fractions), alcohols (for example methanol, butanol, pentanol, benzyl alcohol), ketones (for example cyclohexanone, gamma Butryolactone), pyrrolidones (NMP, NOP), acetates (glycol diacetate), glycols, dimethyl fatty acid amides, fatty acids and fatty acid esters. In principle, solvent mixtures can also be used, carriers such as natural stone powder (e.g. kaolins, clays, talc, chalk) and synthetic stone powder (e.g. highly disperse silica, silicates); Emulsifiers such as nonionic and anionic emulsifiers (e.g. polyoxyethylene fatty alcohol ethers, alkyl sulfonates and aryl sulfonates) and dispersants such as lignin sulfite liquors and methyl cellulose.

Alkali, alkaline earth, and ammonium salts of lignosulfonic acid, naphthalenesulfonic acid, phenolsulfonic acid, dibutylnaphthalenesulfonic acid, alkylarylsulfonates, alkyl sulfates, alkyl sulfonates, fatty alcohol sulfates, fatty acids and sulfated fatty alcohol glycol ethers of sulfonate, condensation products are also used as surface-active substances, and also condensation products tem naphthalene and naphthalene derivatives with formaldehyde, condensation products of naphthalene or naphthalene sulfonic acid with phenol and formaldehyde, polyoxyethylene octylphenol ether, ethoxylated isooctylphenol, octylphenol, nonylphenol, alkylphenol polyglycol ether, tri-butylphenylpolyphenyl alcohol, fatty alcohol, trihydroxyphenylpolyphenyl alcohol, fatty alcohol, tri-phenylpolyphenyl alcohol, fatty alcohol Castor oil, polyoxyethylene alkyl ether, ethoxylated polyoxypropylene, lauryl alcohol polyglycol ether acetal, sorbitol esters, lignin sulfite liquors and methyl cellulose.

For the production of directly sprayable solutions, emulsions, pastes or oil dispersions, mineral oil fractions from medium to high boiling points, such as kerosene or diesel oil, furthermore coal tar oils as well as oils of vegetable or animal origin, aliphatic, cyclic and aromatic hydrocarbons, e.g. Toluene, xylene, paraffin, tetrahydronaphthalene, alkylated naphthalenes or their derivatives, methanol, ethanol, propanol, butanol, cyclohexanol, cyclohexanone, isophorone, strongly polar solvents, e.g. Dimethyl sulfoxide, N-methylpyrrolidone or water into consideration.

Powders, materials for broadcasting and dusts can be prepared by mixing or grinding the active substances together with a solid carrier.

Granules, e.g. Coating, impregnation and homogeneous granules can be produced by binding the active ingredients to solid carriers. Solid carriers are e.g. Mineral earths, such as silica gels, silicates, talc, kaolin, attack clay, limestone, lime, chalk, bolus, loess, clay, dolomite, diatomaceous earth, calcium and magnesium sulfate, magnesium oxide, ground plastics, fertilizers, e.g. Ammonium sulfate, ammonium phosphate, ammonium nitrate, ureas and vegetable products such as cereal flour, tree bark, wood and nutshell flour, cellulose powder and other solid carriers.

The formulations generally contain between 0.01 and 95% by weight, preferably between 0.1 and 90% by weight, of the active ingredients. The active ingredients are used in a purity of 90% to 100%, preferably 95% to 100% (according to the NMR spectrum).

Examples of formulations are: 1. Products for dilution in water

A) Water-soluble concentrates (SL)

10 parts by weight of the active ingredients are dissolved in water or a water-soluble solvent. Alternatively, wetting agents or other aids are added. The active ingredient dissolves when diluted in water. B) Dispersible concentrates (DC)

20 parts by weight of the active ingredients are dissolved in cyclohexanone with the addition of a dispersant e.g. Dissolved polyvinyl pyrrolidone. When diluted in water, a dispersion results.

C) Emulsifiable concentrates (EC)

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

D) Emulsions (EW, EO)

40 parts by weight of the active ingredients are dissolved in xylene with the addition of calcium dodecylbenzenesulfonate and castor oil ethoxylate (5% each). This mixture is introduced into water using an emulsifying machine (Ultraturax) and brought to a homogeneous emulsion. Dilution in water results in an emulsion.

E) suspensions (SC, OD)

20 parts by weight of the active ingredients are comminuted in a stirred ball mill to form a fine active ingredient suspension with the addition of dispersing and wetting agents and water or an organic solvent. Dilution in water results in a stable suspension of the active ingredient.

F) Water-dispersible and water-soluble granules (WG, SG)

50 parts by weight of the active ingredients are finely ground with the addition of dispersing and wetting agents and produced using technical equipment (e.g. extrusion, spray tower, fluidized bed) as water-dispersible or water-soluble granules. Dilution in water results in a stable dispersion or solution of the active ingredient.

G) Water-dispersible and water-soluble powders (WP, SP) 75 parts by weight of the active ingredients are ground in a rotor-strator mill with the addition of dispersing and wetting agents and silica gel. Dilution in water results in a stable dispersion or solution of the active ingredient.

2. Products for direct application

H) dusts (DP)

5 parts by weight of the active ingredients are finely ground and intimately mixed with 95% finely divided kaolin. This gives a dust. I) Granules (GR, FG, GG, MG)

0.5 part by weight of the active ingredients are finely ground and combined with 95.5% carriers. Common processes are extrusion, spray drying or fluidized bed. This gives granules for direct application.

J) ULV solutions (UL)

10 parts by weight of the active ingredients are dissolved in an organic solvent e.g. Xylene dissolved. This gives you a product for direct application.

The active ingredients as such, in the form of their formulations or the use forms prepared therefrom, e.g. in the form of directly sprayable solutions, powders, suspensions or dispersions, emulsions, oil dispersions, pastes, dusts, sprinkling agents, granules by spraying, atomizing, dusting, scattering or pouring. The application forms depend entirely on the purposes of use; in any case, they should ensure the finest possible distribution of the active compounds according to the invention.

Aqueous application forms can be prepared from emulsion concentrates, pastes or wettable powders (wettable powders, oil dispersions) by adding water. To prepare emulsions, pastes or oil dispersions, the substances as such or dissolved in an oil or solvent can be homogenized in water by means of wetting agents, adhesives, dispersants or emulsifiers. However, it is also possible to prepare concentrates composed of an active substance, wetting agents, adhesives, dispersants or emulsifiers and possibly solvents or oil, which are suitable for dilution with water.

The active ingredient concentrations in the ready-to-use preparations can be varied over a wide range. In general, they are between 0.0001 and 10%, preferably between 0.01 and 1%.

The active ingredients can also be used with great success in the ultra-low-volume process (ULV), it being possible to apply formulations with more than 95% by weight of active ingredient or even the active ingredient without additives.

Various types of oils, wetting agents, adjuvants, herbicides, fungicides, other pesticides and bactericides can be added to the active compounds, if appropriate also only immediately before use (tank mix). These agents can be mixed into the agents according to the invention, which is usually done in a weight ratio of 1:10 to 10: 1. The compounds I and II, or the mixtures or the corresponding formulations, are used in that the harmful fungi, the plants, seeds, soils, surfaces, materials or spaces to be kept free from them are mixed with a fungicidally effective amount of the mixture or the compounds I and II when applied separately. The application can take place before or after the infestation by the harmful fungi.

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

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

Example of use - effectiveness against the leaf sheath disease in rice caused by Corticium sasakii

Pots with rice plants of the "Tai-Nong 67" variety were sprayed to runoff point with an aqueous suspension in the active compound concentration given below. On the following day, pots of oat grains infected with Corticium sasakii were placed (5 kernels per pot) Plants placed in a chamber at 26 ° C and maximum humidity After 11 days, the leaf sheath disease on the untreated but infected control plants had developed to such an extent that the infestation could be determined visually in%.

The evaluation is carried out by determining the affected leaf areas in percent. These percentages were converted into efficiencies.

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

W = (1 - σ / £) - 100

o corresponds to the fungal attack of the treated plants in% and ß 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 show no infection. The expected efficacies of the active ingredient mixtures are determined using the Colby formula [RS Colby, Weeds 15, 20-22 (1967)] and compared with the observed efficiencies. Colby formula: E = x + y - xy / 100

E expected efficiency, expressed in% of the untreated control, when using the mixture of active ingredients A and B in concentrations a and bx the efficiency, expressed in% of the untreated control, when using active ingredient A in concentration ay, the efficiency, expressed in% of the untreated control when using the active ingredient B in the concentration b

Table A - Individual substances

Table B - mixtures according to the invention

*) Efficiency calculated according to the Colby formula The results of the tests show that the mixtures according to the invention are significantly more effective in all mixing ratios than calculated using the Colby formula.

Claims

claims

1. Containing fungicidal mixtures for controlling harmful fungi

^' 1) the triazolopyrimidine derivative of the formula I,

and

2) dichlofluanide of the formula II,

in a synergistically effective amount.

2. Fungicidal mixtures according to claim 1, comprising the compound of the formula I and the compound of the formula II in a weight ratio of 100: 1 to 1: 100.

3. Fungicidal composition comprising a liquid or solid carrier and a mixture according to one of claims 1 or 2.

4. A method for combating harmful fungi, characterized in that the fungi, their habitat or the plants to be protected against fungal attack, the soil or seeds are treated with an effective amount of the compound I and the compound II according to claim 1.

5. The method according to claim 4, characterized in that the compounds I and II according to claim 1 simultaneously, jointly or separately, or in succession.

6. The method according to claim 4, characterized in that the mixture according to claims 1 or 2 in an amount of 5 g / ha to 1500 g / ha.

7. The method according to claims 4 to 6, characterized in that rice pathogenic harmful fungi are combated.

8. The method according to claims 4 and 5, characterized in that the mixture according to claims 1 or 2 is used in an amount of 1 to 1000 g / 100 kg of seed.

9. Seed containing the mixture according to claims 1 or 2 in an amount of 1 to 1000 g / 100 kg.

10. Use of the compounds I and II according to claim 1 for the preparation of an agent suitable for combating harmful fungi.