CN1187296A - Method for control of resistant populations of lepidoptera - Google Patents

Abstract

There is provided a method for the control of resistant populations of Lepidoptera: Olethreutidae such as Cydia pomonella (L.), Laspeyresia pomonella (L.) Grapholitha molesta (Busck), and the like and the protection of fruit crops therefrom which comprises contacting said Lepidoptera with a toxic amount of flufenoxuron.

Description

Prevent and treat the method for resistance Lepidoptera population

The lepidopterous insects of drinking water fruit is worldwide important pests.Owing to increase the go-on-go expense before the packing and increase the infection possibility in busy season subsequently.Even the very little infection of its percentage is also much bigger than the monetary value of fruit economically.Survive the winter larva from entering the fruit after blooming after hibernation-like state is sprouted wings, cause breeding for the first time.In the season of growth, nearly 3 times breeding can appear, and impel the Lepidoptera population that the extraneous toxin as insecticide is produced resistance.

Though numerous insecticides can be prevented and treated lepidopterous insects effectively, need frequently use mostly.As a result, as the multiplication of Lepidoptera resistance (pesticide resistance) insect of anti-acylureas, anti-pyrethroid and anti-organic phosphor, grievous injury the effect of insecticide.

Therefore, the purpose of this invention is to provide the high efficiency compound of preventing and treating the useful uniqueness of pesticide resistance Lepidoptera population.

Another object of the present invention provides the enhancing fruit trees protection, avoids the lepidopterous insects invasion of anti-acylureas, anti-pyrethroid and anti-organic phosphor and the method for burst.

Advantage of the present invention is that its method of preventing and treating resistance Lepidoptera population is harmless to useful caste, and quite gentle to environmental activity.

These and other feature of the present invention and purpose will be clear from detailed description hereinafter.

Summary of the invention

The invention provides the method for preventing and treating the resistance lepidopterous insects; comprise 1-(4-(the 2-chloro-α that makes described lepidopterous insects, its habitat, multiplication plot or provand contact dosis toxica; α, α-three fluoro-is to toloxyl)-the 2-fluorophenyl)-3-(2, the 6-difluoro benzoyl) urea (flufenoxuron).

The present invention also provide one strengthen vegetative period and harvest time fruit tree avoid that the resistance lepidopterous insects is invaded and harassed and the method for the protective effect of burst, comprise the flufenoxuron of the container of the soil of described fruit tree or its growth and water or its storage being used effective dose.

The detailed description of invention

Resistance is a phenomenon that extensively exists, and can find the resistant strain population of much important economically insect at present.Acylureas, pyrethroid and organic phosphor there are the lepidopterous insects of resistance worldwide fruit trees protection has been proposed a serious problem.

Herein, resistance is defined as: insect population is to heritable reduction of insecticide effect susceptibility, and this reduction is expressed as and is exposed to insecticide the influence of each insect is reduced (each initial with same population or last time viewed drug effect of drug effect is compared) with number of times.

Known benzoyl urea compounds (as United States Patent (USP) 4,666,942 is described) is effective to the control of insect and mite.But, find that now particular compound 1-(4-(α-three fluoro-is to toloxyl for 2-chloro-α, α)-2-fluorophenyl)-3-(2, the 6-difluoro benzoyl) urea (flufenoxuron) antagonism Lepidoptera population is but highly efficacious.In specification and claims, term " pesticide resistance population " refers to the population of anti-acylureas, anti-pyrethroid, anti-carbamate, anti-phenylhydrazide and/or anti-organic phosphor.

Surprising is, resistance Lepidoptera population, as this purpose Olethreutidae such as codling moth (Cydiapomonella (L.)), codling moth (Laspeyresla pomonella (L.)), oriental fruit moth (Grapholithamolesta (Busck)) etc., being preferably codling moth (Cydia pomonella (L.)) can be by contacting described pesticide resistance lepidopterous insects, its habitat, multiplication plot or provand and prevented and treated with the flufenoxuron of dosis toxica.Surprising especially is that the Lepidoptera population of acyl urea compound flufenoxuron antagonism acylureas is still effective.

Flufenoxuron be applied to strengthen fruit tree (preferable be the operatic circle and drupe, as apple, pears, Wen Quince, apricot, peach and Lee, better be the operatic circle, as apple and pears) avoid as described in the protective effect of the invasion and attack of pesticide resistance Lepidoptera and infection institute induced damage resistive.The method of preventing and treating pesticide resistance Lepidoptera and cover crop with the present invention is harmless to useful caste, is specially adapted to the responsibility governing plan of insect.

The effective dose of used flufenoxuron compound changes according to the characteristic of the mode of being used, the resistance lepidopterous insects that will prevent and treat, the degree of invasion, controlling object host's kind, the time of using, weather condition etc. in the inventive method.Certainly, can use effective dose, but not be to protect the control crop to avoid the pesticide resistance Lepidoptera to encroach on necessary greater than the flufenoxuron compound.

In practice, be scattered in the water or the about 10ppm-10 in other cheap liquid-carrier, (be preferably about 100ppm-5,000ppm) flufenoxuron compound administration of the present invention generally is effective in pesticide resistance lepidopterous insects, its habitat, multiplication plot or provand to 000ppm.Flufenoxuron compound of the present invention is applied to leaf, withe, flower or the fruit of crop with the consumption of about 5.0g/hL-50g/hL (being preferably about 5.0g/hL-15g/hL), or the soil of its growth or water, or the container of results fruit storage, also be effective for preventing and treating pesticide resistance lepidopterous insects (particularly codling moth).

Advantageously, flufenoxuron compound of the present invention can impose separately to be prevented and treated in the pesticide resistance lepidopterous insects, also can merge with other biological or chemical pest control agent (as other insecticide, bactericide, weed killer herbicide etc.) and use.

The flufenoxuron compound of using effective dose can strengthen fruit tree and avoid the protective effect that resistance lepidopterous insects (particularly codling moth) infects and attacks.Forms such as described compound can spray agent, pulvis, wetting powder, granule are used.Suitable composition comprises that the flufenoxuron compound of effective dose and agricultural go up acceptable inert fluid or solid carrier.

For to clearer understanding of the present invention, now be described below specific embodiment.These embodiment only are illustrative, must not be interpreted as the restriction to the scope of the invention and basic principle.In fact, except the content that this paper set forth and described, to those skilled in the art, various improvement of the present invention can become clear from the description of the following examples and front.This improvement has also been listed in the scope of claims.

Embodiment 1

Flufenoxuron is an Evaluation on effect to sensitive strain and the anti-medicine of codling moth

This evaluation test system breeds the codling moth (is responsive, and another is for there being pesticide resistance) of two strains on artificial bio-membrane's medium.Sensitive strain (S) derives from the source that the laboratory keeps, and resistant strain (R) derives from the field of observing the pesticide resistance level, then remains in the laboratory with the decis selection pressure.Test is carried out on the larva that is put on the treated medium.With being mixed with 100g/L (CASCADE ^100 DC) flufenoxuron of dispersed concentrating agents (DC) is handled.Handling the back observed 7 days.The data of gained are analyzed with standard probit method, to determine each strain of codling moth ((R) and (S)) required lethal concentration (LC) (LC of 90% lethality ₉₀) and respectively be the concentration (LC of 50% lethality ₅₀).The results are shown in Table I.

Table I

Flufenoxuron is other LC to the virulence codling moth of responsive system of codling moth and resistance system ₉₀(ppm) LC ₅₀(ppm) S 11.72 3.29R 12.95 3.85

As shown in Table I, between the resistance of codling moth system and responsive system, do not observe sensitivity differences to flufenoxuron.Resistance to flufenoxuron compares LC ₅₀(R)/LC ₅₀(L) be 1.17.By comparison, the resistance ratio that records in the same test to decis is about 50, and diflubenzuron resistance ratio is about 10,000.

The comparative example 2

The field recruitment evaluation of test-compound antagonism codling moth

In these assessments, selecting has highly drug-fast field to diflubenzuron, decis or zolone.All tests are carried out on the unlimited field that resistance codling moth population is arranged.Handle with following commercial preparation:

The present invention

Flufenoxuron-CASCADE ^TM100 DC (100g/L can disperse concentrating agents)

Control compounds

Azinphos-methyl-GUSATHION ^TMXL 25%WP (250g/kg wetting powder)

Diflubenzuron-DIMILIN ^TM25%WP (250g/kg wetting powder)

Teflubenzuron-DART ^TM150 EC (150g/L concentrated suspension)

Decis-DECIS ^TM25 EC (25g/L emulsifiable concentrates)

Each field experiment is all with tabular report independently.Control compounds uses the consumption suitable with the commercial quantities of recommending to test.Therefore, for sensitive varieties, the % effect value of expectation will be 80%-100%.The result is reported as the % effect, refers to that fruit attacked the percentage that frequency reduces.

In order to estimate this % effect on every splat (be untreated and handle), the sum (T) and the affected fruit number (A) of counting fruit.Being soaked the percentage of attacking fruit is calculated as follows: $A=\frac{A}{T}\×100$

Calculate the % effect with Abbott ' s formula as follows:

Table II

Test-compound protection apple is avoided acylureas

Land for growing field crops assessment active component dosage g/hL % effect %A (being untreated) flufenoxuron 10.0 92-azinphos-methyls 43.75 89-diflubenzurons 10.0 23-Teflubenzurons 5.0 63 of resistant strain codling moth institute induced damage resistive-be untreated 0.0-49.9

Table III

Test-compound protection apple is avoided acylureas

The land for growing field crops assessment of resistant strain codling moth institute induced damage resistive

Active component dosage g/hL % effect %A (being untreated)

Flufenoxuron 10.0 95-

Azinphos-methyl 43.75 87-

Diflubenzuron 10.0 24-

Be untreated 0.0-12.6

Shown in Table II and III, in above-mentioned field experiment, in the codling moth area that diflubenzuron is had high resistance, flufenoxuron shows efficient to the acylureas resistant strain of codling moth.

Table IV

Test-compound protection apple is avoided pyrethroid

The land for growing field crops assessment of resistant strain codling moth institute induced damage resistive

Active component dosage g/hL % effect %A (being untreated)

Flufenoxuron 10.0 73-

Azinphos-methyl 43.75 69-

Decis 0.75 22-

Be untreated 0.0-61.9

In this area, very high to the resistance of decis.As shown in above-mentioned Table IV, confirm that flufenoxuron antagonism decis strain has fine protective effect.

Table V

Test-compound protection apple is avoided organic phosphor

The land for growing field crops assessment of resistant strain codling moth institute induced damage resistive

Active component dosage g/hL % effect %A (being untreated)

Flufenoxuron 10.0 86-

Zolone 60.0 10-

Be untreated 0.0-99.1

In this test insect district occurred frequently, very high to the resistance of zolone.Can find out that from above-mentioned Table V flufenoxuron has efficiently for anti-zolone strain.

Claims (10)

1. prevent and treat the method for pesticide resistance lepidopterous insects, comprise described lepidopterous insects, its habitat, multiplication plot or bait place are contacted with the flufenoxuron of poisonous strength.

2. the method for claim 1, wherein lepidopterous insects is acylureas resistant strain, pyrethroid resistant strain and organic phosphor resistant strain.

3. the method for claim 1, wherein lepidopterous insects is an Olethreutidae.

4. strengthen vegetative period and harvest time the fruit crop avoid that the pesticide resistance lepidopterous insects infects and the method for the protective effect of invasion and attack, comprise the flufenoxuron of the soil of described crop or its growth and water or its hiding place being used effective dose.

5. method as claimed in claim 4, wherein fruit tree is the operatic circle or drupe.

6. method as claimed in claim 5, wherein the operatic circle and drupe are selected from the group of apple, pears, Wen Quince, apricot, peach and Li Zucheng.

7. method as claimed in claim 4, wherein the flufenoxuron compound is used with the consumption of about 5.0g/hL-50g/hL.

8. method as claimed in claim 7, wherein the flufenoxuron compound is used with the consumption of about 5.0g/hL-15g/hL.

9. as claim 1,2 or 4 described methods, wherein lepidopterous insects is a codling moth.

10. as claim 2 or 4 described methods, wherein lepidopterous insects is the acylureas resistant strain.