CH687732A5 - A method for combating insects. - Google Patents

Description

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description

The invention relates to a method for controlling insects, in which at least one compound of the formula is used in free form or in the form of an agrochemically compatible salt, characterized in that

(a) Insects of the Thripidae family from the order Thysanoptera, or

(b) insects of the Aculus genus from the Eriophyidae family belonging to the Acarina order are controlled;

the appropriate use of this compound, appropriate insect control agents containing this active ingredient, and a process for the preparation and use of these agents.

European Patent EP-B 179 022 indicates that compounds of the type of the compound of the formula I are suitable for controlling a large number of different insects. The examples show how insects from the Coleoptera, Diptera and Lepidoptera orders can be controlled.

Unexpectedly, and completely surprising in view of the disclosure explained above, it has now been found that the large number of compounds mentioned in EP-B 179 022 and the large number of orders of pests which can be combated with these pesticide-active compounds especially the compound of formula I is particularly well suited for the control of pests, in particular for the control of insects from the family Thripidae from the order Thysanoptera and insects of the genus Aculus from the family Eriophyidae belonging to the order Acarina.

The control of insects of the type according to the invention is of great importance for the user in the field of insect control, since without their targeted control, e.g. large economic losses, e.g. due to the damage caused by these insects to agricultural products.

In the context of the present invention, preference is given, on the one hand, to methods of controlling insects of the type mentioned, in which the compound of the formula is used in free form.

On the other hand, a method for controlling is preferred

(1) Insects of the Frankliniella genus, in particular of the species Frankliniella occidentalis, Frankliniella fusca, Frankliniella tritici and Frankliniella vaccinii, Frankliniella bispinosa, Frankliniella gossypiana, Frankliniella parvula, Frankliniella robusta, Frankliniella schultzei, Frankliniiellainlinell, Frankliniiellainu, Frankliniiellauinlinu, Frankliniiellauu or

(2) Insects of the species Aculuslechtendali, Aculus fockeui, Aculus lycopersici, Aculus masseii and Aculus pelekassi, especially Aculuslechtendali.

The compound of formula I used according to the invention is known and e.g. in EP-B 179 022.

The compound of formula I used according to the invention is a preventive and / or curative active ingredient in the field of insect control with favorable warm-blood, fish and plant tolerance, even at low use concentrations. The active ingredient used according to the invention is effective against all or individual stages of development of normally sensitive, but also of resistant insects of the type mentioned. The insecticidal activity of the active ingredient used according to the invention can be direct, i.e. in killing the insects, which occurs immediately or only after some time, for example when molting, or indirectly, e.g. in a reduced egg deposition and / or hatching rate, the good effect corresponding to a mortality rate of at least 50 to 60%.

The method according to the invention, in which resistant strains of the pests mentioned, in particular resistant strains of Frankliniella occidentalis, Aculuslechtendali or Aleurothrixus floccus, have to be combated, must be particularly emphasized.

The active ingredient used according to the invention can be used, in particular, on plants, in particular on useful and ornamental plants in agriculture, in horticulture and in forestry, or on parts, such as fruits,

(I)

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Control flowers, foliage, stems, tubers or roots, pests of the type mentioned which occur in such plants, i.e. contain or destroy, parts of the plant that later grow are still protected against these pests.

In particular, cereals such as wheat, barley, rye, oats, rice, corn or sorghum are the target cultures; Beets such as sugar beet or fodder beet; Fruit, e.g. Pome, stone or soft fruit such as apples, pears, plums, peaches, almonds, cherries or berries, e.g. Strawberries, raspberries, blueberries, currants or blackberries; Legumes, such as beans, lentils, peas or soybeans; Oil fruits, such as rapeseed, mustard, poppy seeds, olives, sunflowers, coconut, castor bean, cocoa or peanuts; Cucumber plants such as pumpkins, cucumbers or melons; Fiber plants such as cotton, flax, hemp or jute; Citrus fruits such as oranges, lemons, grapefruit or tangerines; Vegetables such as spinach, lettuce, asparagus, cabbages, carrots, onions, tomatoes, potatoes or peppers; Bay plants, such as avocado, cinnamon or camphor; or tobacco, nuts, coffee, egg crops, sugar cane, tea, pepper, grapevines, hops, banana plants, natural rubber plants or ornamental plants, especially pome, stone or berry fruits; Cucumber family; Cotton; Citrus fruits; Vegetables; Tobacco, banana plants or ornamental plants; particularly preferably cucumber family; Vegetables or ornamental plants.

A particularly important aspect of the method according to the invention is the control of a) Frankliniella occidentalis on vegetable crops and ornamental plants; or b) from Aculuslechtendali to pome fruit, especially apples.

Further areas of application of the active ingredient used according to the invention are the protection of inventories, stores or material, and in the hygiene sector in particular the protection of domestic or farm animals from pests of the type mentioned.

The invention therefore also relates to insecticides for use against pests of the type mentioned, such as emulsifiable concentrates, suspension concentrates to be selected depending on the desired objectives and given conditions, directly sprayable or dilutable solutions, spreadable pastes, diluted emulsions, wettable powders, soluble powders , dispersible powders, wettable powders, dusts, granules or encapsulations in polymeric substances which - at least - contain one of the active ingredients used according to the invention.

The active ingredient in these agents is in pure form, a solid active ingredient e.g. in a special grain size, or preferably together with - at least - one of the auxiliaries customary in formulation technology, such as extenders, e.g. Solvents or solid carriers, or such as surface-active compounds (surfactants) used.

As a solvent e.g. Suitable are: optionally partially hydrogenated aromatic hydrocarbons, preferably the fractions Ce to C12 of alkylbenzenes, such as xylene mixtures, alkylated naphthalenes or tetrahydronaphthalene, aliphatic or cycloaliphatic hydrocarbons, such as paraffins or cyclohexane, alcohols, such as ethanol, propanol or butanol, glycols and their ethers and esters such as propylene glycol, dipropylene glycol ether, ethylene glycol or ethylene glycol monomethyl or ethyl ether, ketones such as cyclohexanone, isophorone or diacetone alcohol, strongly polar solvents such as N-methylpyrrolid-2-one, dimethyl sulfoxide or N, N-dimethylformamide, Water, optionally epoxidized vegetable oils, such as optionally epoxidized rapeseed, castor, coconut or soybean oil, and silicone oils.

As solid carriers, e.g. natural dust, such as calcite, talc, kaolin, montmorillonite or attapulgite, is generally used for dusts and dispersible powders. To improve the physical properties, highly disperse silicas or highly disperse absorbent polymers can also be added. Porous types such as pumice, broken brick, sepiolite or bentonite can be used as granular, adsorptive granulate carriers, and calcite or sand can be used as non-sorptive carrier materials. In addition, a large number of granulated materials of an inorganic or organic nature, in particular dolomite or comminuted plant residues, can be used.

Depending on the nature of the active ingredient to be formulated, suitable surface-active compounds are nonionic, cationic and / or anionic surfactants or surfactant mixtures with good emulsifying, dispersing and wetting properties. The surfactants listed below are only examples; the relevant literature describes many other surfactants which are customary in formulation technology and are suitable according to the invention.

Suitable nonionic surfactants are primarily polyglycol ether derivatives of aliphatic or cycloaliphatic alcohols, saturated or unsaturated fatty acids and alkylphenols, which contain 3 to 30 glycol ether groups and 8 to 20 carbon atoms in the (aliphatic) hydrocarbon radical and 6 to 18 carbon atoms in the alkyl radical of the alkylphenols can. Also suitable are water-soluble polyethylene oxide adducts containing 20 to 250 ethylene glycol ether and 10 to 100 propylene glycol ether groups on polypropylene glycol, ethylenediaminopolypropylene glycol and alkylpolypropylene glycol with 1 to 10 carbon atoms in the alkyl chain. The compounds mentioned usually contain 1 to 5 ethylene glycol units per propylene glycol unit. Examples include nonylphenol polyethoxyethanols, castor oil polyglycol ether, polypropylene-polyethylene oxide adducts, tributylphenoxy

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polyethoxyethanol, polyethylene glycol and octylphenoxypolyethoxyethanol mentioned. Fatty acid esters of polyoxyethylene sorbitan, such as polyoxyethylene sorbitan trioleate, are also suitable.

The cationic surfactants are primarily quaternary ammonium salts which have at least one alkyl radical having 8 to 22 carbon atoms as substituents and low, optionally halogenated, alkyl, benzyl or lower hydroxyalkyl radicals as further substituents. The salts are preferably in the form of halides, methyl sulfates or ethyl sulfates. Examples are stearyl trimethyl ammonium chloride and benzyl di (2-chloroethyl) ethyl ammonium bromide.

Suitable anionic surfactants can be both water-soluble soaps and water-soluble synthetic surface-active compounds. Suitable soaps are the alkali, alkaline earth and optionally substituted ammonium salts of higher fatty acids (C10-C22), such as the sodium or potassium salts of oleic or stearic acid, or of natural fatty acid mixtures, for example from coconut or Tall oil can be extracted; the fatty acid methyl taurine salts should also be mentioned. However, synthetic surfactants are used more frequently, in particular fatty sulfonates, fatty sulfates, sulfonated benzimidazole derivatives or alkylarylsulfonates. The fatty sulfonates and sulfates are generally in the form of alkali, alkaline earth or optionally substituted ammonium salts and generally have an alkyl radical having 8 to 22 carbon atoms, alkyl also including the alkyl part of acyl radicals; the sodium or calcium salt of lignosulfonic acid, dodecylsulfuric acid ester or a fatty alcohol sulfate mixture made from natural fatty acids may be mentioned as examples. This subheading also includes the salts of sulfuric acid esters and sulphonic acids from fatty alcohol-ethylene oxide adducts. The sulfonated benzimidazole derivatives preferably contain 2 sulfonic acid groups and a fatty acid residue with about 8 to 22 carbon atoms. Examples of alkylarylsulfonates are the sodium, calcium or triethanolammonium salts of dodecylbenzenesulfonic acid, dibutylnaphthalenesulfonic acid or a naphthalenesulfonic acid / formaldehyde condensation product. Corresponding phosphates, such as salts of the phosphoric acid ester of a p-nonylphenol (4-14) ethylene oxide adduct or phospholipids, are also suitable.

The agents generally contain 0.1 to 99%, in particular 0.1 to 95%, active ingredient and 1 to 99.9%, in particular 5 to 99.9%, - at least - of a solid or liquid auxiliary, in which Rule 0 to 25%, in particular 0.1 to 20%, of the agent can be surfactants (% means weight percent in each case). While concentrated agents are preferred as a commercial product, the end user generally uses diluted agents which have significantly lower active substance concentrations. Preferred agents are composed in particular as follows (% = weight percent):

Emulsifiable concentrates:

Active ingredient: 1 to 90%, preferably 5 to 20%

Surfactant: 1 to 30%, preferably 10 to 20%

Solvent: 5 to 98%, preferably 70 to 85%

Dusts:

Active ingredient: 0.1 to 10%, preferably 0.1 to 1%

solid carrier: 99.9 to 90%, preferably 99.9 to 99%

Suspension concentrates:

Active ingredient: 5 to 75%, preferably 10 to 50%

Water: 94 to 24%, preferably 88 to 30%

Surfactant: 1 to 40%, preferably 2 to 30%

Wettable powders:

Active ingredient: 0.5 to 90%, preferably 1 to 80%

Surfactant: 0.5 to 20%, preferably 1 to 15%

solid carrier: 5 to 99%, preferably 15 to 98%

Granules:

Active ingredient: 0.5 to 30%, preferably 3 to 15%

solid carrier: 99.5 to 70%, preferably 97 to 85%

The spectrum of action of the compositions according to the invention can be broadened considerably by adding other insecticidal active ingredients and adapted to the given circumstances. The active ingredient additives are e.g. Representatives of the following classes of active substance are considered: organic phosphorus compounds, nitrophenols and derivatives, formamidines, ureas, carbamates, pyrethroids, chlorinated hydrocarbons and Bacillus thuringiensis preparations. The agents according to the invention can also

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other solid or liquid auxiliaries, such as stabilizers, e.g. optionally epoxidized vegetable oils (e.g. epoxidized coconut oil, rapeseed oil or soybean oil), defoamers, e.g. Silicone oil, preservatives, viscosity regulators, binders and / or adhesives, as well as fertilizers or other active ingredients to achieve special effects, e.g. Bactericides, fungicides, nematicides, molluscicides or selective herbicides.

The agents according to the invention are produced in a known manner, in the absence of auxiliary substances e.g. by grinding, sieving and / or pressing a solid active substance or mixture of active substances, e.g. to a certain grain size, and in the presence of at least one auxiliary e.g. by intimately mixing and / or grinding the active ingredient or active ingredient mixture with the excipient (s). These processes for the preparation of the compositions according to the invention and the use of the compound of the formula I for the production of these compositions likewise form a subject of the invention.

The application methods for the agents, i.e. the methods for controlling pests of the type mentioned, such as spraying, atomizing, dusting, brushing, pickling, scattering or pouring, depending on the desired objectives and given conditions, and the use of the agents for controlling pests of the type mentioned are further objects of the invention. Typical application concentrations are between 0.1 and 1000 ppm, preferably between 0.1 and 500 ppm, of active ingredient. In particular, spray liquors with active ingredient concentrations of 30, 50, 80, 100, 150 or 200 ppm are used. The application rates per hectare are generally 1 to 2000 g of active ingredient per hectare, in particular 10 to 1000 g / ha, preferably 20 to 600 g / ha. Application rates of 300, 400 or 450 g of active ingredient per hectare are preferred. Application rates of 0.25, 0.75, 1.0 or 2.0 g of active ingredient per tree are preferred.

A preferred application method in the field of crop protection is application to the foliage of the plants (foliar application), the frequency of application and application rate being able to be adjusted to the infestation pressure of the respective pest. The active ingredient can also get into the plants through the root system (systemic effect) by soaking the location of the plants with a liquid agent or the active ingredient in solid form in the location of the plants, e.g. in the ground, e.g. in the form of granules (floor application).

The following examples serve to illustrate the invention. They do not limit the invention. Temperatures are given in degrees Celsius.

Formulation examples (% = weight percent)

Example F1: Active ingredient emulsion concentrates

Ca-dodecylbenzenesulfonate castor oil polyethylene glycol ether (36 mol EO)

Tributylphenol polyethylene glycol ether (30 mol EO)

Cyclohexanone xylene mixture a)

b)

c)

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40%

50%

5%

8th%

6%

5%

-

-

-

12%

4%

-

15%

20%

65%

25%

20%

Emulsions of any desired concentration can be prepared from such concentrates by dilution with water.

Example F2: Solutions a)

b)

c)

d)

Active ingredient

80%

10%

5%

95%

Ethylene glycol monomethyl ether

20%

-

-

-

Polyethylene glycol MG 400

-

70%

-

-

N-methyl-2-pyrrolidone

-

20%

-

-

Epoxidized coconut oil

-

-

1%

5%

Petrol (boiling limits 160-190 °)

-

-

94%

-

The solutions are suitable for use in the form of tiny drops.

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Example F3: Granules a) b) c) d)

Active ingredient 5% 10% 8% 21%

Kaolin 94% - 79% 54%

Fumed silica 1% - 13% 7%

Attapulgite - 90% - 18%

The active ingredient is dissolved in dichloromethane, sprayed onto the carrier and the solvent is then evaporated off in vacuo.

Example F4: dusts a) b)

Active ingredient 2% 5% ~

Fumed silica 1% 5%

Talc 97% -

Kaolin - 90%

Ready-to-use dusts are obtained by intimately mixing the carriers with the active ingredient.

Example F5: wettable powder a)

b)

c)

Active ingredient

25%

50%

75%

Na lignin sulfonate

5%

5%

-

Na lauryl sulfate

3%

-

5%

Na diisobutylnaphthalenesulfonate

-

6%

10%

Octylphenol polyethylene glycol ether (7-8 mol EO)

-

2%

-

Fumed silica

5%

10%

10%

kaolin

62%

27%

-

The active ingredient is mixed with the additives and ground well in a suitable grinder. Spray powder is obtained which can be diluted with water to form suspensions of any desired concentration.

Example F6: Emulsion concentrate

Active ingredient 10%

Octylphenol polyethylene glycol ether (4-5 mol EO) 3%

Ca-dodecylbenzenesulfonate 3%

Castor oil polyglycol ether (36 mol EO) 4%

Cyclohexanone 30%

Xylene mixture 50%

Emulsions of any desired concentration can be prepared from this concentrate by dilution with water.

Example F7: dusts a)

b)

Active ingredient

5%

8th%

talc

95%

-

kaolin

-

92%

Ready-to-use dusts are obtained by mixing the active ingredient with the carrier and grinding it in a suitable mill.

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Example F8: Extruder granules

Active ingredient Na lignin sulfonate carboxymethyl cellulose kaolin

10% 2% 1% 87%

The active ingredient is mixed with the additives, ground and moistened with water. This mixture is extruded, granulated and then dried in a stream of air.

Example F9: coated granules

The finely ground active ingredient is applied evenly in a mixer to the kaolin moistened with polyethylene glycol. In this way, dust-free coating granules are obtained.

Example F10: Suspension concentrate

The finely ground active ingredient is intimately mixed with the additives. This gives a suspension concentrate from which suspensions of any desired concentration can be prepared by dilution with water.

Biological examples

Example B 1: Action against Frankliniella occidentalis

Pepper plants in the greenhouse, which are populated with a natural mixed population of larvae, nymphs and adults of Frankliniella occidentalis, are sprayed three times at 10-day intervals with a spray mixture which contains 10 g / hl of the compound of the formula I until dripping wet. Immediately before the second and one day after the third treatment, the nymphs of the plants treated in this way and of untreated control plants are counted and the reduction in the number of nymphs is determined. The reduction is 92% after 10 days and 97% after 21 days.

Claims (1)

Claims 1. A method for controlling insects, according to which an insecticidal agent which has at least one compound of the formula Active ingredient Polyethylene glycol (MG 200) kaolin 3% 3% 94% Active ingredient ethylene glycol Nonylphenol polyethylene glycol ether (15 mol EO) Na lignin sulfonate Carboxymethyl cellulose 37% aqueous formaldehyde solution Silicone oil in the form of a 75% aqueous emulsion water 40% 10% 6% 10% 1% 0.2% 0.8% 32% 7 5 10th 15 20th 25th 30th 35 40 45 50 55 60 CH 687 732 A5 o-cf2-chfcf3 Cl (I), in free form or in the form of an agrochemically compatible salt, as active ingredient, and contains at least one auxiliary substance, to which insects or their habitat is applied, characterized in that (a) Insects of the Thripidae family, or (b) insects of the Aculus genus from the Eriophyidae family belonging to the Acarina order, be fought. 2. The method according to claim 1, characterized in that the compound of formula I is used in free form. 3. The method according to claim 1 or 2 for controlling insects of the genus Frankliniella. 4. The method according to claim 1 or 2 for combating the species Frankliniella occidentalis, Frankliniella fusca, Frankliniella tritici and Frankliniella vaccinii, Frankliniella bispinosa, Frankliniella gossypia-na, Frankliniella parvula, Frankliniella robusta, Frankliniella schultzei, Frankliniella tenuicellaiams and Frankliniella tenuicellaiams. 4. The method according to any one of claims 1 or 2 for controlling insects of the genus Aculus. 6. The method according to claim 1 or 2 for controlling insects of the species Aculuslechtendali, Aculus fockeui, Aculus lycopersici, Aculus masseii and Aculus pelekassi. 7. Insect control agent for use in a method as described in claim 1, characterized in that the agent contains at least one compound of the formula or an agrochemically acceptable salt thereof as an active ingredient and at least one auxiliary. 8. Composition according to claim 7, characterized in that it contains the compound of form I in free form. 9. A process for the preparation of an agent containing at least one auxiliary as described in claim 7, characterized in that the active ingredient is intimately mixed and / or ground with the auxiliary (s). 10. Use of the compound of formula o-cf2-chfcf3 CI (D. o-cf2-chfcf3 CI (I), for the preparation of an agent as described in claim 7. 8th