CN1107651A

CN1107651A - Insecticide composite microemulsion

Info

Publication number: CN1107651A
Application number: CN 94119066
Authority: CN
Inventors: 张文吉; 李学锋; 明九雪; 王成菊; 吴学民
Original assignee: 李学锋
Priority date: 1994-12-27
Filing date: 1994-12-27
Publication date: 1995-09-06
Anticipated expiration: 2014-12-27
Also published as: CN1036111C

Abstract

The microemulsion as insecticide is prepared from cyanopentyl pyrethrin and methomyl as active component, as well as cosolvent, emulsifier, stabilizer and water as supplement.

Description

Insecticide composite microemulsion

The present invention relates to a kind of Pesticidal combination microemulsion, specifically, relate to and a kind ofly contain sumicidin, Methomyl is the Pesticidal combination microemulsion of effective ingredient.

Microemulsion is the pesticides new formulation that occurs the external eighties.It is a kind of by the ternary system that water-surfactant-the oleophylic component constitutes, because the particle diameter of formed emulsion particle is very little, therefore names and is microemulsion.It has (1) incombustibility, convenient transportation.(2) be solvent with water, do not corrode container, do not have the container restriction.(3) particle of emulsion is ultra tiny, and is littler than common missible oil, and penetration increases, so render a service high.Advantage such as (4) smell is little is very promising novel form.Because it is one of mechanism of resistance development that the epidermis permeability reduces, and microemulsion has good dispersion, emulsion has the particle superfine, and the characteristics that permeability increases can overcome owing to the epidermis permeability reduces the resistance that produces.This is the control of resistant insect, especially is the control of the present resistant bollworm of giving prominence to, and a kind of highly effective approach is provided.

Because the generation of bollworm resistance makes chemical control dosage in cotton field increase, environmental pollution is serious, and the pesticide poisoning incident increases, and brings massive losses for cotton grower's production and life.One of purpose of the present invention is to increase the environmental problem of bringing at overcoming the agricultural chemicals usage amount, increase the infiltration capacity of medicament to insect, selected carbamates has the Methomyl of ovicidal action, with the tangible pyrethroid pesticide sumicidin of Methomyl synergistic effect, by best proportioning, being aided with cosolvent, emulsifier, stabilizing agent, is solvent with water, is processed into prestige cyanogen microemulsion.

Among the present invention, the content of active ingredient sumicidin generally accounts for the 1-20(percent weight in volume of preparation total amount, as follows), the content of Methomyl generally accounts for the 10-40 of preparation total amount, the ratio of sumicidin and Methomyl is generally 1: 1-10, preferred proportion 3: 17, cosolvent can be a methyl alcohol, ethanol, preferred cosolvent is an ethanol, content is 10-40%, emulsifier can be polyethylene glycol nonionic emulsifier-agricultural emulsifier NO, polyalcohol nonionic emulsifier-Tween-80, newborn No. 500 of anionic emulsifier-Nong, mixed emulsifier-Nong breast 0201, farming breast 0203, or the mixture of mentioned emulsifier.The preferred mixture that adopts among the present invention, as the newborn 0201+ farming of farming breast 0203, stabilizing agent can be n-butanol, propyl alcohol, preferred n-butanol, content is generally 1-5%.With water as solvent content is mended to 100%.Preparation of the present invention if desired can also contain other auxiliary element, as antifreezing agent.Adopt pesticide processing method commonly used, above-mentioned each composition is evenly mixed, can preparation cost invention microemulsion.

Liquor of the present invention is the uniform yellow transparent liquid of outward appearance, and density is 1.02g/cm ³

The physicochemical property of liquor of the present invention and every index all meet the national standard of relevant agricultural chemicals.

In actual applications, the liquor dilute with water of the present invention of effective dose, spray pest control, liquor of the present invention can be used for the cotton field and prevents and treats various pests, preferably prevents and treats cotton field bollworm, cotten aphid.

Except as otherwise noted, the percentage among the present invention is percent weight in volume.

The preparation of following mask body and drug effect are implemented illustration, only the present invention have been made detailed explanation, but have not limited the present invention.

Example of formulations one:

Sumicidin 5%

Methomyl 15%

Methyl alcohol 20%

Farming breast No. 500 20%

N-butanol 5%

Water surplus

Above-mentioned active ingredient is evenly mixed, be mixed with single-phase transparency liquid, below Pei Fang compound method is all identical with example of formulations one.

Example of formulations two:

Sumicidin 3%

Methomyl 17%

Methyl alcohol 20%

The newborn 0201+ farming of farming breast 0,203 25%

N-butanol 5%

Water surplus

Example of formulations three:

Sumicidin 3%

Methomyl 17%

Methyl alcohol 20%

The newborn 0201+ farming of farming breast 0,203 22%

N-butanol 5%

Water surplus

EXPERIMENTAL EXAMPLE one: prestige cyanogen microemulsion mixture synergism toxicity test.

One, Toxicity Determination report

(1), reagent agent and source thereof:

Methomyl: 82.4% former powder, chemical plant, Jining provides

Sumicidin: 80% crude oil, northern agricultural university is real grinds and tests the pharmaceutical factory and provide

(2), examination worm:

Cotton bollworm: should change is the third-instar larvae that the insectary provides

Mythimna separata: should change is the third-instar larvae that the insectary provides

Cotten aphid: the seedling aphid, pick up from agricultural university science park cotton field

(3), experimental technique:

Adopt capillary dropping, medicament becomes finite concentration with acetone diluted, with the capillary dropper soup is put the chest backboard, is put in 25 ℃ of thermostatic chambers after putting abundant medicine.Check death condition 5 hours (cotten aphid), 24 hours (mythimna separata), 48 hours (cotton bollworm) respectively.Each handles 3 repetitions, and each repeats used examination borer population is respectively 10 (cotton bollworms), 20 (cotten aphid), 30 (mythimna separata).Methods such as data input CASIO calculator carries out the analysis of probability value, calculates the toxicity regression formula, obtains the lethal dose of 50, and employing Sun Yun is abundant are obtained co-toxicity coefficient.

(4), experimental result:

The used cotton bollworm of this experiment is to pick up from interchannel and Handan District, and at the different algebraically of test indoor feeding, wherein Handan groupy phase is to sensitivity; Mythimna separata is test indoor feeding sensitive population for many years.

Experimental result sees Table 1, table 2, table 3.

(5), interpretation of result:

From experimental result, mixture preparation all has good synergistic effect to cotton bollworm, and Handan strain is many for later at the experiment indoor feeding, more sensitive strain.The interchannel strain is at the experiment indoor feeding resistant strain in 5 generations.From the synergy situation, mixture is to Handan strain co-toxicity coefficient 160, interchannel strain co-toxicity coefficient is reached 293, this mixture antagonism strain synergistic effect is described, and more obvious (resistant strain is to about 20 times of fenvalerate resistances, the Methomyl resistance is reached 6-7 doubly), from the lethal dose of 50, the consumption of mixture all is lower than single agent.

EXPERIMENTAL EXAMPLE two: the selection of cosolvent and emulsifier:

Select 4 kinds of cosolvents and 4 kinds of emulsifier to test.Result of the test sees Table 4.

Find out that from the result to select cosolvent A, B effect better, and the toxicity height of B, thus select A as cosolvent, A as cosolvent in emulsifier first, second effect better, and fitment stability, with the emulsifier first: second=4: 18 is best.

EXPERIMENTAL EXAMPLE three:

The generation cotton bollworm field control effectiveness test report of 20% prestige cyanogen microemulsion control cotton field

Test method

The cotton bollworm field control effectiveness test carries out in the area just outside a city gate, Xihua County, the sub-district area is about 60 square metres, whenever be treated to a sub-district, triplicate, 3 samplings in every sub-district, investigation insect population radix before 50 strains of fixedly listing, the dispenser, after the dispenser 2,4,6 days investigation insect population rates that go down are calculated control efficiency according to the insect population rate that goes down.

Result and analysis

Result of the test sees Table 5, and as seen from Table 5: 20% prestige cyanogen microemulsion control efficiency under same dose is higher than 10% sumicidin and Methomyl.

The result of the test in area, Kaifeng

Test method

The cotton bollworm field control effectiveness test carries out in the Kaifeng county.About 40 square metres of sub-district area whenever is treated to a sub-district, triplicate.3 samplings in every sub-district, 50 strains of fixedly listing, investigation insect population radix before the dispenser, 2,4,6 days investigation insect populations rate that goes down is calculated control efficiency according to the insect population rate that goes down after the dispenser.

Result and analysis

Result of the test sees Table 6, and as seen from Table 6: 20% prestige cyanogen emulsion is at 800 times, and control efficiency is respectively 90%, 80% in the time of 1500 times, can control cotton bollworm harm effectively.

Hebei Cangzhou Area board result of the test

Test method

The cotton seedling aphids field control effectiveness test carries out in the Hebei Cangzhou Area, about 60 square metres of sub-district area, and each is treated to a sub-district, and 3 points are got in each sub-district, decide strain and list, and investigation insect population radix is investigated residual borer population at different time after the dispenser before the dispenser.Calculate insect population go down rate and control efficiency.

Interpretation of result

Result of the test sees Table 7, and as can be seen from Table 7, the drug effect of 20% prestige cyanogen emulsion control cotten aphid is suitable with the 24%0000 Lingshui Spring agent of import medicament, can reach the effective control to cotton aphid.

20% prestige cyanogen microemulsion is at cotton field, Haidian, Beijing control cotten aphid field control effectiveness test

Test method

The cotton seedling aphids field control effectiveness test experimental field carries out at Beijing agricultural university research park, sub-district area 40m ², each is treated to a sub-district, triplicate, and every sub-district strain decided at the higher level but not officially announced investigation insect population radix of listing, spray medicine different time is investigated remaining borer population, calculates insect population go down rate and control efficiency.

Three, interpretation of result

As can be seen from Table 8, contrast 20% methomyl milk oil, 20% permethrin milk oil and 30% goes out the bell missible oil under the situation of recommended drug amount, control efficiency all is lower than 20% prestige cyanogen microemulsion.And prestige cyanogen microemulsion after dispenser five days, control efficiency all is higher than 90%, and the lasting period is longer.

Summing up the various places field test results shows: prestige cyanogen microemulsion uses in the recommended drug amount, preventive effect is higher than the contrast medicament, and cotton bollworm, cotten aphid are had the control synergistic effect, and the particle of emulsion is ultra tiny, penetration increases, so render a service height, smell is little, toxicity is low, environmental pollution is little, for the Pesticidal mixture made of a kind of economy, efficient, no poisoning, be one of effective agent that prevents and treats at present cotton pest, particularly cotton bollworm, cotten aphid.

Claims

1, a kind of Pesticidal combination microemulsion, it contains:

The 1-20% sumicidin,

The 10-40% Methomyl,

The 10-40% cosolvent,

The 10-30% emulsifier,

The 1-5% stabilizing agent,

Excess water

2, according to the microemulsion of claim 1, it is characterized in that the effective ingredient sumicidin: Methomyl is 1: 1-10.

3, according to the microemulsion of claim 1, wherein preferred effective ingredient sumicidin: Methomyl is 3: 17.

4, according to the microemulsion of claim 1-3, cosolvent wherein can be methyl alcohol, ethanol.

5, according to the microemulsion of claim 4, wherein preferred cosolvent is an ethanol.

6, according to the microemulsion of claim 1-3, wherein emulsifier is: 0201 or 0203, No. 500, No. 600, Tween 80 etc.

7, according to the microemulsion of claim 6, wherein preferred solvent is 0201 and 0203.

8, according to the microemulsion of claim 1-3, stabilizing agent wherein can be n-butanol, propyl alcohol.

9, according to the microemulsion of aforesaid right requirement 8, preferred stabilizer wherein is a n-butanol.

10, according to the microemulsion of claim 1-3, wherein cosolvent is an ethanol, and emulsifier is 0201 and 0203, and stabilizing agent is a n-butanol.

11, according to the compound method of the liquor of above-mentioned arbitrary claim, it is characterized in that above-mentioned each active ingredient is evenly mixed, to form the liquor of homogeneous phase.

12,, it is characterized in that the above-mentioned liquor of effective dose is awarded on the crop, with pest control according to the purposes of claim 1-14.

13, according to the purposes of claim 15, insect wherein comprises the various agricultural insect.

14, according to the purposes of claim 15, wherein preferably cotton bollworm, cotten aphid.

15, according to the purposes of claim 15, wherein preferably be used to prevent and treat resistant bollworm.