CN1103546A - Insecticide Pesticide Mixture - Google Patents

Abstract

The present invention relates to fenvalerate, methomyl and methyl parathion as effective Active ingredient ternary pesticide mixture solution. The above active ingredients are supplemented by Powerful Pompancarb EC composed of effective agents, additives, and solvents with a reasonable formula. The synergistic effect of resistant cotton bollworm is obvious, the insecticidal toxicity is high, the action is rapid, and the prevention The treatment effect is good, it can not only kill older larvae, but also kill eggs, which overcomes the existing conventional It is one of the effective pesticides for the control of cotton bollworm at present. one.

Description

The invention relates to a mixed insecticidal liquid with fenvalerate, methomyl and methyl parathion as active ingredients. The above-mentioned effective ingredients are combined with a suitable synergist, a cosolvent and a solvent to form a strong propanecarb emulsion. The pests have obvious synergistic effect, especially the resistant cotton bollworm has a strong synergistic control effect. Strong Baomiancarb can not only kill older adults, but also kill eggs. It has a good control effect on cotton bollworms that have developed resistance to pyrethroid pesticides. Due to the obvious synergistic effect, the dosage is reduced, the harm is reduced, and the environmental pollution is reduced. Therefore, The development of this variety is one of the most economical and effective pesticides for controlling resistant cotton bollworm in my country's cotton production.

Usually a large number of chemical pesticides such as pyrethroids, carbamate esters, and organophosphorus are used in large quantities to control cotton pests, resulting in the resistance of cotton bollworms to various insecticides to varying degrees, which brings a series of serious consequences. The threat posed by cotton production has now become a worldwide problem. At present, the cotton bollworm has developed resistance to various insecticides in the main cotton-producing areas of my country. Cotton bollworms have multiple generations in a year, and the alternation of generations is serious. The insect stages in the field are irregular, and adults, eggs, and larvae of different ages often exist at the same time, especially in the year of large occurrence. Cotton aphids, especially aphids and cotton bollworms occur together, so an ideal compound should have the effect of killing eggs, killing larvae and killing aphids.

The purpose of the present invention is aimed at the overlapping of generations of the cotton bollworm occurrence period and the irregular characteristics of the field insect period, and selected carbamates have ovicidal effect of methomyl, and organophosphorus still has high-efficiency formazan to 3-4 instar larvae. Base-1605, and the pyrethroid insecticide fenvalerate, which has a synergistic effect with the above two agents, are processed according to the optimal ratio and supplemented with synergists. Therefore, the liquid agent concentrates the strengths of the three agents, which not only kills eggs but also kills larvae and increases efficiency. It scientifically solves the problem of alternation of generations of cotton bollworms and irregular stages that are difficult to control, and can effectively control resistant cotton bollworms. And inhibit the further development of its drug resistance. It avoids the poor effect of single use of methomyl to control larvae above the second instar, methyl-1605 does not kill eggs and fenvalerate is easy to produce drug resistance, and the dosage is reduced by more than half compared with single use. The raw materials used in this product are all based on domestic large-tonnage products, with low cost, wide sources, simple processing technology, no three wastes, and very significant economic benefits.

Aiming at the problem of cotton bollworm prevention and control, the present invention screens different formulas of more than ten kinds of pesticides, selects fenvalerate, methomyl, and methyl-1605 as mixed agents for the key problems in the control, and uses The different ratios of the three pesticides were used to test the toxicity of cotton bollworm and other pests as test materials, and the ratio with a higher co-toxicity coefficient was selected as the compatibility of the selected pesticides.

In the mixed liquid of the present invention, various synergists that have synergistic effects on pyrethroids or organophosphorus insecticides can also be further added. The synergist can be piperonyl butoxide, SV1, S2, sesame oil, octachlorodiphenyl ether, etc. Preferably adopt sesame oil as synergist, in the present invention, the content of synergist is generally 2-5% of combined content.

The chemical name of fenvalerate is α-cyano-3-phenoxybenzyl (R.S)-2-(4-chlorophenyl)-3-methylbutyrate; the chemical name of methomyl is 1-(formyl Sulfuryl) ethylene aminomethyl carbamate; the chemical name of methyl-1605 is 0,0-=dimethyl-0-p-nitrophenyl phosphorothioate, and the present invention uses the ternary mixture It exists in the form, and under the optimal mixing ratio screened, it has excellent synergistic control effect on various agricultural pests, especially resistant cotton bollworm.

Specifically, the preferred liquid formulation of the present invention contains 2-10% fenvalerate, 8-20% methomyl, and 8-30% methyl-1605 as active ingredients.

The above-mentioned various components of the present invention, as well as active ingredients and various synergists, can be added into common emulsifiers and solvents for preparing pesticide liquid preparation emulsifiable concentrates to prepare liquid preparations.

According to the above, the composition of the liquid formulation of the present invention is as follows:

Fenvalerate 2-10%

Methomyl 8-20%

Methyl-1605 8-30%

Synergist 2-5%

Emulsifier 10-20%

Solvent balance

The liquid preparation of the present invention can be prepared by uniformly mixing the above-mentioned components.

The appearance of the liquid preparation of the present invention is a uniform brown-red oily liquid with a density of 0.97g/cm3. The physical and chemical properties and various technical indicators of the liquid preparation of the present invention all meet the national standards for pesticide emulsifiable concentrates.

In practical application, the effective amount of the liquid of the present invention is diluted with water and sprayed to prevent and control pests. The liquid of the present invention can be used for the control of various pests in cotton fields, preferably for the control of cotton bollworms.

Unless otherwise specified, the percentages in the present invention are weight and volume percentages.

The following specific preparations and drug effect examples only illustrate the present invention in detail, but do not limit the present invention.

Recipe one:

Fenvalerate 3%

Methomyl 9%

Methyl-1605 9%

Emulsifier (0201+0202) 10%

Xylene Balance

Mix the above active ingredients evenly to prepare a single-phase emulsifiable cream. The preparation methods of the following formulas are the same as those of formula 1.

Recipe 2:

Fenvalerate 3%

Methomyl 8%

Methyl-1605 9%

Emulsifier (0201+0202) 10%

Xylene Balance

Recipe three:

Fenvalerate 3%

Methomyl 8%

Methyl-1605 9%

Sesame Oil 2%

Emulsifier 0201 10%

Xylene Balance

Recipe four:

Fenvalerate 3% Methomyl 8% Methyl-1605 9% Sesame oil 2% Emulsifier (0201+0202) 10% Xylene The balance

Through the following examples of insecticidal effects, the synergistic control effect of the powerful Baomiancarb solution of the present invention on various agricultural pests such as cotton bollworm, cotton aphid, and armyworm has been specifically illustrated.

Embodiment one:

Study on Resistance of Cotton Bollworm in Different Developmental Stages

The fundamental way out to control the harm of cotton bollworm lies in comprehensive management, and the key lies in scientific medication. On the one hand, scientific medication lies in the selection of suitable varieties, and on the other hand, it is more important to select the appropriate period. Applying pesticides to the weak points of pests can not only reduce the dosage of pesticides but also improve the control effect. Accordingly, we selected three populations of Hejian, Handan, and Beijing with different levels of resistance to fenvalerate and methomyl (the order of resistance levels of the three populations was Hejian > Beijing > Handan), The toxicity of fenvalerate, methomyl and methyl parathion to different developmental stages of cotton bollworm was determined by dipping method, drug film method and spot method respectively. The results showed that regardless of the level of resistance, methomyl was sensitive to both eggs and newly hatched larvae, fenvalerate was sensitive to newly hatched larvae, and methyl parathion was sensitive to all insect stages, indicating that It has no cross-resistance with the other two agents, and the test results are shown in Table 1, Table 2, and Table 3

Table 1 Toxicity of methomyl aqueous solution to cotton bollworm at different developmental stages

Note a: Relative virulence = LC ₅₀ of Beijing (or Hejian) population / LC ₅₀ of Handan population

b: The measurement result of the third instar larvae is the lethal medium dose, the unit is ug/mg

Table 2 Toxicity of methyl parathion to different developmental stages of cotton bollworm

Note a: Relative virulence = LC ₅₀ of Beijing (or Hejian) population / LC ₅₀ of Handan population

b: The measurement result of the third instar larvae is the lethal medium dose, the unit is ug/mg

Table 3 Toxicity of fenvalerate to different developmental stages of cotton bollworm

Note a: Relative virulence = LC ₅₀ of Beijing (or Hejian) population / LC ₅₀ of Handan population

b: The measurement result of the third instar larvae is the lethal medium dose, the unit is ug/mg

Embodiment two:

Comparative study on toxicity of fenvalerate, methomyl and methyl-1605 to different ages of cotton bollworm

Due to its own biological characteristics and planting system, cotton bollworm has serious alternation of generations and is difficult to control, especially the older larvae are very harmful and difficult to control. Therefore, a mixed preparation that can kill both eggs and older larvae will be an ideal medicine. For this reason, we used the dipping method to measure the toxicity of fenvalerate, methyl parathion, and methomyl to the 2nd and 4th instar larvae of the Handan population respectively. The 4th instar larvae were all effective, but methomyl was less effective on older larvae. The results are shown in Table 4

Table 4 Toxicity of several pesticides to different ages of cotton bollworm

Embodiment three:

The toxicity of three single agents and mixtures with different ratios to cotton bollworm, aphids and armyworms with different resistance levels was tested. Calculate the co-toxicity coefficient to judge its synergistic level. For detailed data, see Table 5, Table 6, and Table 7.

Using the capillary drip method, the drug is diluted with acetone to a certain concentration, and the drug solution is placed on the back of the chest with a capillary dropper, and placed in a constant temperature room at 25°C after the drug is applied. Mortality was checked at 5 hours (cotton aphids), 24 hours (armyworm), and 48 hours (cotton bollworm). Each treatment was repeated three times, and the number of test insects used in each repetition was 10 (cotton bollworm), 20 (cotton aphids), and 30 (army worm). Input the data into the CASIO calculator for probability value analysis, calculate the virulence regression formula, find out the lethal dose, and use the methods of Sun Yunpei and others to find out the co-toxicity coefficient.

The cotton bollworms used in this experiment were collected from Hejian and Handan, and raised in different generations in the laboratory, among which the Handan population is relatively sensitive; Armyworm is a sensitive population that has been raised in the laboratory for many years. The experimental results are shown in Table 5, Table 6 and Table 7.

From the experimental results, the mixed preparation has a good synergistic effect on cotton bollworm, and the Handan strain is a more sensitive strain after breeding in the laboratory for many generations. The Hejian strain is a resistant strain raised in the laboratory for 5 generations. From the synergistic situation, the co-toxicity coefficient of the mixed agent is 160 to the Handan strain, and 293 to the Hejian strain, indicating that the synergistic effect of the mixed agent is more obvious on the resistant strain (the resistant strain is 20% resistant to fenvalerate. times, the resistance to methomyl is up to 6-7 times), and in terms of the lethal dose, the dosage of the mixture is lower than that of a single dose. The toxicity test to aphids and armyworms also confirmed that the mixed preparation has a good synergistic effect.

Table 5 Effects of test agents on cotton bollworm

Table 7 The effect of test chemicals on aphids

Embodiment four:

Field efficacy test report of each formula

Field test of 20% Qiangli Baomiancarb on cotton seedling aphids (Haidian District, Beijing)

The experiment was carried out at the experimental site of the Science Park of North Agricultural University, with an area of 40m ² , and each site was a plot, repeated three times. Set up plants in each plot to investigate the number of insect populations, investigate the number of remaining insects at different times of spraying, and calculate the rate of insect population decline and control effect.

As can be seen from Table 8, the control effects of the reference agents 20% fenvalerate, 20% methomyl, 50% methyl parathion, and 30% methomyl were all lower than 20% at the recommended dosage. % strong cotton weave cream. On the fifth day after spraying, the control effect of Qianli Baomiancarb EC still reached 96-98%, and the lasting effect was longer.

Table 8 Statistical Table of Field Drug Efficacy Experiment (Formula 5)

20% strong Baomianwei is a high-efficiency mixed preparation developed by the Department of Applied Chemistry, North Agricultural University. In order to clarify its control effect on cotton pests, field efficacy tests on cotton bollworm, cotton aphid, and cotton red spider were carried out in Zaoji Township, Zhaocun Township, and Shengtiekun Township in Luyi County, Henan Province. The results are reported as follows:

experiment method:

Dilute the test agent Qianlibaomiancarb by 1000, 1500, and 2000 respectively, and dilute the remaining agents by 1500 times. Each treatment was repeated three times. Each plot area was 5 mu, and the control area was 1 mu. Take three points for each plot, investigate 5 cotton plants at each point, and spray 50 kg of chemical solution per mu.

results and analysis:

The test results are shown in Table 9, Table 10, Table 11, and Table 12 respectively. From the results, the control effect of 20% strong propancarb EC on cotton bollworm is better than that of the control agent Kungfu, methyl parathion, fenvalerate, and methadone. Weiduhao, the three-day control effect of 1000 times reached 90.6%, and 1500 times also reached 88.2%. It can be seen that the drug has a good effect on cotton bollworm, whether it is quick-acting or residual. The three-day population reduction rate against cotton spider mite reached 98.3%, which was 3.7% and 6.1% higher than Kungfu and methomyl, respectively, and the control effect against cotton aphid was 1500 times 24 hours up to 100%. Strong Pamiancarb has the advantages of fast, broad-spectrum and high efficiency.

Table 9 Control effect of test agents on the second generation of cotton bollworm Time: 1993.6.13

(Recipe 1) Location: Zaoji Township

Table 10 The control effect of the test agents on the second generation cotton bollworm Time: 1993.6.20

(Recipe 2) Location: Zaoji Township

Table 11 The control effect of tested pesticides on cotton aphid Time: 1993.6.10

(Recipe 3) Location: Zhaocun Township

Table 12 The control effect of test agents on cotton spider mite (formula 4)

Location: Pig Tie Kun Township

Time: 1993.6.10

The results of field tests in various places show that: Qianlibaomiancarb is used in the recommended dosage, the control effect is higher than that of the control agent, and it has a synergistic effect on the control of cotton bollworm and cotton aphid. It is an economical, efficient, and non-toxic insecticidal mixture. It is one of the effective agents for controlling cotton field pests, especially cotton bollworm.

Claims (16)

1. An insecticidal mixed liquid, characterized in that it contains fenvalerate, methomyl, and methyl parathion. 2. The liquid formulation according to claim 1, characterized in that the content of fenvalerate is 2-10%, the content of methomyl is 8-20%, and the content of methyl parathion is 8-30%. Active ingredients account for 20-60% of the total. (weight volume percent) 3. The solution according to claims 1-2, characterized in that the solution contains a synergist. 4. The liquid preparation according to claim 3, wherein the synergist can be SV1, S2, butanosperm, octachlorodiphenyl ether, sesame oil. 5. A solution according to claim 4 wherein the preferred builder is sesame oil. 6. The liquid preparation according to claim 1, which contains a co-solvent. 7. The liquid preparation according to claim 6, which contains ethanol as a co-solvent. 8. The liquid preparation according to claim 5, characterized in that the solution contains 2-5% synergist. 9. The liquid preparation according to claims 1-8, characterized in that it contains 2-10% fenvalerate, 8-20% methomyl, 8-30% methyl parathion, 2-5% efficacious agent , 10-15% co-solvent. (weight volume percent) 10. A solution according to any one of the preceding claims, characterized in that the solution contains an emulsifier and a solvent. 11. The liquid preparation according to claim 10, wherein the content of the emulsifying electrode is 10-20% (percentage by weight and volume), and the solution contains the balance of solvent to constitute a 100% composition. 12. The preparation method of the liquid preparation according to any one of the preceding claims, characterized in that the above-mentioned active ingredients are uniformly mixed to form a homogeneous liquid preparation. 13. Use of the liquid preparation according to claims 1-12, characterized in that an effective amount of said liquid preparation is applied to crops for controlling pests. 14. The use according to claim 13, wherein the pests include various agricultural pests. 15. The use according to claim 13, wherein cotton bollworm, cotton aphid, cotton spider mite are preferred. 16. Use according to claim 13, wherein preferably for controlling resistant cotton bollworms.