CN1029908C

CN1029908C - Method for making larvicide emulsoid and its composition

Info

Publication number: CN1029908C
Application number: CN 91101493
Authority: CN
Inventors: 韦德健; 李安全; 罗敏兴
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-03-08
Filing date: 1991-03-08
Publication date: 1995-10-04
Anticipated expiration: 2006-03-08
Also published as: CN1054881A

Abstract

The present invention discloses a method for preparing chlorbenzuron emulsoid and an insecticidal composition thereof. The method comprises the following steps that firstly, raw chlorbenzuron powder is dissolved in a solvent, and then, an appropriate emulsifier and the solvent are prepared into the emulsoid; next, some pesticide which can be compounded with the emulsoid is added to the emulsoid so that a formed emulsoid composition has the characteristics of no delamination, no precipitation and easy dispersion on plant leaf surfaces and can performs the function of adhering and suffocating pests. Under the same conditions, the emulsoid and the composition can kill more varieties of pests than the existing chlorbenzuron powder and suspending agents and need raw powder more than 5 times less than that of the existing chlorbenzuron powder and suspending agents. The chlorbenzuron emulsoid and the insecticidal composition thereof are safe to human beings and livestock and have no toxicity.

Description

Method for making larvicide emulsoid and its composition

The present invention relates to a kind of moulting hormone class agricultural-chemical emulsion, particularly the missible oil that young urea makes with going out and the production method of Pesticidal combination thereof.

The young urea that goes out is a moulting hormone class agricultural chemicals, its effect mainly is to destroy the chitin of moth class, mosquito, fly and some insect larvae precipitation and the formation that hinders new epidermis, make after the insect's food-taking cast off a skin, the old epidermis at the positions such as mouthpart, chest, abdomen, foot of larva and pupa is difficult to take off when abnormal, new surperficial cracky flows out and death body fluid, this class agricultural chemicals is effective, be not easy contaminated environment, and to the person poultry safety.

The young urea that goes out commonly used has several, and they comprise:

The 1-(4-chlorphenyl)-and 3-(2, the 6-difluoro benzoyl) urea

The 1-(4-chlorphenyl)-and the 3-(2-chlorobenzene formacyl) urea

The 1-(4-chlorphenyl)-and the 3-(2-chlorobenzene formacyl) thiocarbamide

The 1-(4-chlorphenyl)-and 3-(2,6-dichloro-benzoyl base) urea

These materials are general water insoluble and be insoluble in alcohol, ketone, ether and benzene class organic solvent, it is generally that former grinding is broken when factory dispatches from the factory, the adding filler is made pulvis or is added some dispersed substances and makes suspending agent (colloidal suspending agent), there is Tonghua, Jilin chemical institute to produce 25% suspending agent as domestic, Anyang Forest Chemicals Factory of The Ministry of Forestry produces 25% and 50% suspending agent, it is directly pulvis or dilute with water suspending agent to be sprayed at plant surface later on that the user uses, but these two kinds of formulations exist the shortcoming of following several respects: one, former survival dose is big, no matter be pulvis or colloidal suspending agent, particle all can not grind very carefully, and the dosage of spray is a lot; Two, uniformity and bad dispersibility are difficult to stick on the blade face, and effect is not good enough during sprinkling; Three, the easy layering and precipitating of suspending agent uses and has any problem; Four, pharmic function is single, and deinsectization is selective, can not once eliminate when certain plants has several different types of insect simultaneously.

The object of the present invention is to provide the go out method of young urea missible oil and be Main Ingredients and Appearance of a kind of production with this missible oil, the composition of other agricultural chemicals of composite some stable in properties, good bug eliminating effect, make on the basis that keeps original moulting hormone efficacy of a drug, also increased the effect of eliminating other kind class pest, reached a medicine and use more.

Realization of the present invention at first is to find the young urea dissolving power of going out by force, does not destroy the solvent of its chemical property again, is to select suitable emulsifier and cooperate solvent then, and it is made the missible oil of stable performance, good dispersion; Go back some agricultural chemicals that other insecticidal effect is arranged of combining simultaneously as synergist, make Pesticidal combination.Just reached purpose of the present invention.

According to " solvent handbook (Chemical Industry Press, version in 1987) introduces in, benzoylphenyl urea material solvent preferably mainly contains following several, 2-Pyrrolidone, N, dinethylformamide, N, N-dimethylacetylamide, N, N-diethylformamide, methyl-sulfoxide etc., these compounds generally are the intensive polar solvents of non-proton type, can dissolve the young urea raw powder that goes out.

The young urea raw powder that will go out is dissolved in one of the above-mentioned solvent, make benzoylphenyl urea original medicine solution, then, also need add emulsifier and cooperate solvent, just can obtain the young urea missible oil of going out of desired concn, can be distributed in good dispersed on the plant leaf behind the dilute with water during use, the inventor has chosen agricultural breast and machine oil emulsion as emulsifier through repetition test and comparison, make the missible oil that makes have several characteristics: one, good stability, not stratified, do not produce precipitation, be easy to deposit; Two, benzoylphenyl urea original medicine more is evenly dispersed on the plant leaf surface, increases the penetration of soup, shorten the desinsection time polypide; Three, increase the adhesion of soup to plant and insect, especially the adding of machine oil emulsion makes the young urea missible oil that goes out spray the back forms difficult volatilization on plant oil film, insect is produced the effect that suffocates, even meet the overcast and rainy insecticidal effect that also do not influence, acarid, aphid etc. had special effect.

The effect that cooperates solvent is the former drug solns of dilution, meets the requirements of concentration, and keeps the flowability of missible oil, considers from solvability, matching, toxic etc. are many-sided, and the present invention has chosen the derivative of benzene and benzene as cooperating solvent.

In order further to increase the disinsection efficiency of the young urea that goes out, the present invention when producing the young urea missible oil that goes out, also can add a small amount of other can be composite with it, agricultural chemicals to people and animals' low toxicity, as insecticides such as galecron, Amitraz and some organic nitrogen, organochlorines, in missible oil, add a spot of Amitraz and galecron in the following embodiments of the invention, can improve the ability of killing acarid and two spotted spider mite significantly.

Can significantly reduce the consumption of the young urea raw powder that goes out through the missible oil of said method assembly, the young urea content that goes out when general suspending agent dispatches from the factory is 20-50%, and only be 2-5% in this missible oil, the latter is the former 1/5-1/10, and do not change the deinsectization effect of moulting hormone, in addition, from solvent, the emulsifier of assembly and cooperate the situation of choosing of solvent, missible oil still kept the going out hypotoxicity of young urea raw powder or suspending agent has guaranteed the security reliability of using.

Below sketch production technology of the present invention:

The young urea raw powder that will go out at normal temperatures adds dissolution with solvents, adds emulsifier then under constantly stirring, and adds to cooperate solvent even again, and bottling or tinning can be dispatched from the factory behind the precipitation mechanical admixture.

Describe the go out production method of young urea missible oil of the present invention in detail below in conjunction with embodiment:

Embodiment one, the 2.5% young urea missible oil (4-1 number) that goes out:

With 2.5 kilograms of 1-(4-chlorphenyls)-the 3-(2-chlorobenzene formacyl) urea is added to the N that 40-50 rises; dissolve in the dinethylformamide; under condition of stirring, add 6 liters of farming breasts and machine oil emulsion 20-25 liter then successively; adding xylene solution to cumulative volume at last is 100 liters, and mixing and remove insoluble impurities can dispatch from the factory in tinning.

Embodiment two, the 2.5% young urea missible oil (4-2 number) that goes out:

With the 1-(4-chlorphenyl)-3-(2; the 6-difluoro benzoyl) 2.5 kilograms of N that are added to 40 liters of urea; dissolved in the dinethylformamide; the method of pressing embodiment one then adds 20 liters of 7 liters of farming breasts and machine oil emulsions; adding toluene at last again, to make the missible oil cumulative volume be 100 liters, can pack after the filtration and dispatch from the factory.

Embodiment three, the 5% young urea missible oil (worm enemy 2-1 number) that goes out:

5 kilograms of 1-(4-chlorphenyls)-3-(2; 6-dichloro-benzoyl base) urea raw powder is dissolved in 50 liters the diethylformamide, and the method for pressing embodiment one adds 8 liters of farming breasts, 25 liters of machine oil emulsions; add 0.8 kilogram of galecron then, adding toluene to cumulative volume at last is 100 liters.

Embodiment four, the 2.5% young urea missible oil (worm enemy 2-2 number) that goes out.

With 2.5 kilograms of 1-(4-chlorphenyls)-the 3-(2-chlorobenzene formacyl) urea is added to that dissolving adds 10 liters of farming breasts fully again in 25 liters the N,N-dimethylacetamide; 25 liters of machine oil emulsions; 0.5 liter of amitraz milk oil is poured dimethylbenzene to cumulative volume at last into and is 100 liters and stirs, and filters bottling promptly.

Test examples:

One, 5% go out 100 times of young urea missible oil dilutions are carried out effect experiment to cabbage caterpillar, and cabbage caterpillar lethality 50-80% in 3 days is dead more than 90% in 5 days behind the medicine.

Two, 2.5% 800 times of tests of pesticide effectiveness to dendrolimus punctatus of young urea missible oil dilution of going out, behind the medicine 14 days, lethality was 95.5%.

Three, 5% go out 1000 times of young urea missible oil dilutions are carried out the test of pesticide effectiveness to litchi stinkbug nymph, and in 7 days, lethality reaches more than 80% behind the medicine.

Four, institute of Guilin area woods section opposes 2-2 missible oil with worm and adds water 800-1000 and doubly orange tree is sprayed, and sprays to kill red spider spider in back 24 hours and reach more than 96%, prevents and treats efficient to two weeks in 7 days after the medication still to keep more than 90%.

Five, Guangxi parasite control research institute and Nanning City health and epidemic prevention station proving effect is fine as a result to the test of pesticide effectiveness of housefly and larvae with missible oil of the present invention, the larva kill ratio is all higher.

Claims

1, a kind of young urea missible oil Pesticidal combination that goes out is characterized in that missible oil is made up of following material:

(1) the former powder of the benzoylphenyl urea of .2-5% weight: 1-(4-chlorphenyl)-3-(2, the 6-difluoro benzoyl) urea or 1-(4-chlorphenyl)-3-(2,6-dichloro-benzoyl base) urea, 1-(4-chlorphenyl)-3-(2-chlorobenzene formacyl) urea, 1-(4-chlorphenyl)-3-(2-chlorobenzene formacyl) thiocarbamide;

(2) the non-proton type polar solvent of .25-50% (volume): 2-Pyrrolidone or N, dinethylformamide, N,N-dimethylacetamide, dimethyl sulfoxide (DMSO);

(3) the farming breast of .6-10% (volume);

(4) machine oil emulsion of .20-25% (volume);

(5). cooperate solvent benzol or toluene, dimethylbenzene, addition to make overall solution volume reach 100%.

2, a kind of young urea missible oil Pesticidal combination that goes out as claimed in claim 1, it is characterized in that it contains young urea raw material of going out of 2-5% weight and 25-50%(volume) non-proton type polar solvent, the farming breast of 6-10%, the machine oil emulsion of 20-25%, benzene class cosolvent and amidine class, organic nitrogen, organic chlorine agriculture chemicals that on a small quantity can be composite with it.

3, according to the production method of claim 1 and 2 described go out young urea missible oil and Pesticidal combinations thereof, it is characterized in that: the young urea raw powder that will go out earlier is dissolved in the solvent, add the farming breast more respectively, machine oil emulsion, Recompounded pesticide and benzene class cooperate stirring solvent emulsification even, remove by filter insoluble impurities then and promptly obtain product.