RU2724514C1 - Insecticide composition - Google Patents

Abstract

FIELD: agriculture.SUBSTANCE: invention relates to the agriculture. Insecticidal composition contains alpha-cypermethrin, bifenthrin, thiamethoxam in ratio of (0.01–8):(0.01–10):1.EFFECT: invention increases efficiency of pest control.1 cl, 6 tbl, 2 ex

Description

The present invention relates to a composition according to the invention having an improved synergistic effect in controlling insect pests of plants, in particular, to a wide range of insecticides for protecting crops.

To protect the crop, it is advisable to use effective chemical insecticides and acaricides that can eliminate insects and mites without harming the crops and which do not have any harmful effects on mammals and other living organisms.

For commercial agricultural applications, for a more beneficial effect, it would be desirable to combine insecticides that have different mechanisms and spectra of action and belong to different chemical classes.

One of the typical problems encountered in the field of pest control is the need to reduce the dose of the active ingredient in order to reduce or avoid adverse environmental or toxicological effects, while still maintaining effective pest control.

In accordance with the present invention, it has been found that a new insecticidal composition comprising thiamethoxam, alpha-cypermethrin and bifentrin shows an unexpected increase in insecticidal activity compared to the insecticidal effect of the individual components.

Pyrethroids bifentrin and alpha-cypermethrin are sodium channel modulators.

Bifentrin is 2-methylbiphenyl-3-ylmethyl (Z) - (1RS) -cis-3- (2-chloro-3,3,3-trifluoroprop-1-enyl) -2,2-dimethylcyclopropanecarboxylate.

Alpha cypermethrin, which is a racemate, includes (S) -α-cyano-3-phenoxybenzyl (1R) -cis-3- (2,2-dichlorovinyl) -2,2-dimethylcyclo-propanecarboxylate and (R) -α- cyano-3-phenoxybenzyl (1S) -cis-3- (2,2-dichlorvinyl) -2,2-dimethylcyclopropanecarboxylate.

Thiamethoxam is an agonist of nicotine acetylcholine receptors from the neonicotinoid class and is 3 - [(2-chloro-5-thiazolyl) methyl] tetrahydro-5-methyl-N-nitro-4H-1,3,5-oxadiazin-4-imine. Thiamethoxam penetrates into the plant, remaining in it for up to 3 weeks, protects for a long time from pests that appear after application of the drug, has a pronounced systemic and translaminar effect. Thiamethoxam systemically affects secreting pests by interacting with nicotinic acetyl-choline receptors.

As a result of the patent information search, the following sources of information were selected:

Known drug Actara, VDG, company Syngenta, which includes thiamethoxam with a consumption rate of 0.1-0.6 kg / ha.

The well-known drug is Eforia, CS, Syngenta company, which consists of the class of neocotinoids thiamethoxam and the class of pyrethroids lambda-cygalotrin. The consumption rate of the drug is 0.2-0.3 l / ha.

A 4-component composition is known (EP 3424322) containing a pesticidal terpene mixture (terpinene, p-cimen, limonene) and an alpha-cypermethrin or bifetrin or thiamethoxam insecticide or a mixture thereof.

Known insecticidal composition (RF 2414819), taken as a prototype, and containing bifentrin and alpha-cypermethrin, with a ratio of components from 1/99 to 99/1. The composition further comprises an agronomically acceptable excipient or adjuvant.

The objective of the present invention is to expand the range of pesticidal mixtures that solve the problem of reducing dosage and expanding the spectrum of application of the composition with quick activity and long-term control, providing long-term protection against pests on the field, preventing the risk of resistance.

The technical result is the use of available raw materials, increased insecticidal action compared with the insecticidal action of the individual components, namely obtaining a synergistic effect, and expanding the range of applications. These substances, belonging to two different chemical classes, are completely complementary.

The technical result is achieved through the use of an insecticidal composition comprising alpha-cypermethrin, bifentrin. Additionally, the composition contains an insecticide thiamethoxam in the ratio, respectively (0.01 - 8): (0.01 - 10): 1.

The inventive mixture is used for vegetation on cereals - spring and winter wheat, spring barley and winter. Harmful objects are bread fleas, a bug bug, a bug, beetles, aphids, leeches, cereal flies, thrips, ground beetle.

It is also used on spring and winter rapeseed against cruciferous flea, rapeseed sawfly, canola beetle, cabbage moth, on potatoes against the Colorado potato beetle and to protect other crops.

Combinations of the active substances according to the invention can be used in the form of their formulations, such as suspensions, suspension emulsions, water-soluble granules, oil dispersion, etc. These formulations can be prepared by known methods, for example, by mixing the active substances with at least one solvent, diluent, emulsifier, dispersant and / or a binder or fixing agent, as well as other common additives.

The invention is illustrated by the following examples.

Example 1. Determination of the synergistic effect

The wireworm feed is treated with the agent in accordance with the standards indicated in table 1. The wireworm larvae (family Elateridae) are planted on the processed feed, after 3 days the mortality of the larvae, expressed as a percentage, is determined. Moreover, they believe that 100% means that all the larvae died, 0% - all the larvae are alive.

Synergies calculated by Colby's formula

Where

X is the death of larvae in%, calculated in relation to the untreated control, (active substance A);

Y - death of larvae in%, calculated in relation to the untreated control, (active substance B);

Uh, _wait. - the expected death of the larvae in% relative to the untreated control when using a synergistic mixture of substances A + B in the indicated proportions.

If the ratio between experimentally observed efficiency (E exp.) And expected efficiency (E expect) is a synergistic factor.

(SF) - more than 1, the mixture exhibits a synergistic effect:

The synergies of insecticidal mixtures during seed treatment, see table 1.

Example 2. Field shallow experiments

The tests were carried out according to the methodology adopted during the registration tests “Methodological guidelines for registration tests of insecticides, acaricides, molluscicides and rodenticides in agriculture” - SPB, 2009.

The results of the field experiments are summarized in tables 2-6.

Experience 2.1. The biological effectiveness of the insecticide of the claimed composition in the fight against the Colorado potato beetle (Leptinotarsa decemlineata Say) on potatoes

Location of the experiment: Russia, Belgorod region.

Soil-climatic zone: II - zone of chernozems of the forest-steppe and steppe regions,

Central Black Earth region of crop cultivation.

See the results in table 2.

Experience 2.2. The biological effectiveness of the insecticide of the claimed composition in the fight against cereal aphids (Aphididae) in barley.

Location of the experiment: Russia, Voronezh region, Ramonsky district,

Soil-climatic zone: II - zone of chernozems of the forest-steppe and steppe regions, the central-chernozem region of crop cultivation.

See results in table 3.

Experience 2.3. Biological effectiveness of the insecticide of the claimed composition in the fight against a wheat fly (Phorbia fumigata Meigen) on wheat

Location of the experiment: Russia, Rostov Region, Salsky District,

Soil-climatic zone: III - chestnut soil zone of the dry-steppe region,

North Caucasus Region

See results in table 4.

Experience 2.4. The biological effectiveness of the claimed composition in the fight against wheat thrips (Haplotrips tritici Kurd.) On spring wheat.

Location of the experiment: Russia, Omsk region.

Soil-climatic zone: I - zone of podzolic and sod-podzolic soils of the taiga-forest region, West Siberian region of crop cultivation. See results in table 5.

Experience 2.5. Biological effectiveness of the insecticide of the claimed composition in the fight against cruciferous flea (Phyllotreta spp.) On rapeseed Place of experiment: Russia, Nizhny Novgorod region, Kstovsky district.

Soil-climatic zone: I - zone of podzolic and sod-podzolic soils of the taiga-flattering region, Volga-Vyatka region of crop cultivation.

See results in table 6.

Claims (1)

An insecticidal composition comprising alpha-cypermethrin, bifentrin, characterized in that the composition further comprises a thiamethoxam insecticide in a ratio of respectively (0.01-8) :( 0.01-10): 1.