CN1165235C - Pesticide preparation mixed with azadirachtin and Bt - Google Patents

Abstract

The present invention provides a mixed nimbin pesticide having the advantages of high efficiency, low toxicity, no pollution, no harm to human and livestock, and low possibility of pesticide resistance generated by pests. In the mixed nimbin pesticide, the synergistic effect and the negative cross resistance relationship between the active components of nimbin and Bt are used for overcoming the pesticide resistance of pests, enhancing the application effect of the pesticide, and enlarging the application range of the pesticide. The deficiencies of the single-agent pesticides can be overcome owning to the synergistic effect of the components of the mixed nimbin pesticide in the application process. The pesticide is particularly suitable for controlling various pests with strong pesticide resistance.

Description

Pesticide preparation mixed with azadirachtin and Bt

The invention belongs to a kind of mixed pesticide, in particular how to mix azadirachtin with other pesticides.

Because people rely on a single type of insecticide for a long time, pests are prone to develop resistance, resulting in a sharp increase in the amount of chemical pesticides used, which not only increases the economic burden on farmers and pollutes the environment, but also due to the large number of insecticides. Natural enemies, leading to rampant damage of pests. At present, there are a large number of mixed insecticides on the market, but most of them are mixed with chemical pesticides. Most of these mixed agents contain organic phosphorus, which are highly toxic to humans and animals, and can easily cause human and animal poisoning. Pests can also develop resistance over time.

The purpose of the present invention is to develop a class of azadirachtin in the seeds of neem plant as the insecticidal active ingredient, after reasonable mixing with high-efficiency, low-toxic Bt insecticides, to obtain azadirachtin that can overcome the resistance of pests Neem mixed with pesticide preparations.

The invention utilizes neem seeds to carry out leaching to obtain an extract solution containing a certain concentration of azadirachtin, and the extract solution is concentrated and evaporated to dryness to form a concentrated solution.

The invention utilizes the azadirachtin in the neem seed of the plant as an insecticidal active ingredient, mixes it with the biopesticide Bt, and adds an appropriate amount of auxiliary agent to prepare a mixed pesticide azadirachtin+Bt wettable powder preparation.

The content ratio of each component in the mixed pesticide azadirachtin+Bt wettable powder preparation is: the content of azadirachtin is 0.1-35% (weight); the content of Bt is 0.5-50% (weight); the content of wetting agent is 1-20% (weight); dispersant content is 7-30% (weight); preservative content is 0.1-2.9% (weight); filler content is 15-75% (weight); the sum of each component is 100% .

The wetting agent component in the mixed pesticide azadirachtin+Bt wettable powder formulation is selected from: any one of lignosulfonate, alkylbenzenesulfonate, pull-open powder, polysorbate ester or Various; the dispersant component is selected from any one or more of naphthalene sulfonate, alkyl sulfonate, polyoxyethyl ether sulfonate, diisopropyl phosphate; the preservative component is selected From: any one or more of activated carbon and alkaline earth metal; the filler component is selected from: any one or more of kaolin, diatomaceous earth, and activated carbon.

The optimum proportioning ratio of each component content in the mixed pesticide azadirachtin+Bt wettable powder preparation is: azadirachtin content is 0.3-20% (weight); Bt content is 1-1.5% (weight); wetting agent The content is 5-15% (weight); the dispersant content is 10-25% (weight); the preservative content is 1-1.5% (weight); the filler content is 45-65% (weight); the sum of each component is 100%.

During the preparation process of the mixed pesticide azadirachtin+Bt wettable powder preparation, the conventional pesticide wettable powder processing technology can be adopted.

In order to better understand the essence of the invention, the technical content of the invention is described in detail below with examples, but the content of the present invention is not limited thereto.

Embodiment one: produce 1.2% (Azadirachtin+Bt) wettable powder

Azadirachtin content 0.8% (weight)

Bt content 0.4% (weight)

Wetting agent 15% (weight)

Dispersant 20% (weight)

Preservatives 1.3% (weight)

Filler 62.5% (weight)

Embodiment two: produce 1.5% (Azadirachtin+Bt) wettable powder

Azadirachtin content 0.9% (weight)

Bt content 0.6% (weight)

Wetting agent 15% (weight)

Dispersant 20% (weight)

Preservatives 1.3% (weight)

Filler 62.2% (weight)

Embodiment three: produce 10% (Azadirachtin+Bt) wettable powder

Azadirachtin content 9% (weight)

Bt content 1% (weight)

Wetting agent 12% (weight)

Dispersant 16% (weight)

Preservatives 1.2% (weight)

Filler 60.8% (weight)

Embodiment four: produce 11% (azadirachtin+Bt) wettable powder

Azadirachtin content 9.8% (weight)

Bt content 1.2% (weight)

Wetting agent 12% (weight)

Dispersant 15% (weight)

Preservatives 1.2% (weight)

Filler 60.8% (weight)

Embodiment five: produce 20% (azadirachtin+Bt) wettable powder

Azadirachtin content 18.6% (weight)

Bt content 1.4% (weight)

Wetting agent 13% (weight)

Dispersant 14% (weight)

Preservatives 1.2% (weight)

Filler 51.8% (weight)

Embodiment six: produce 22% (azadirachtin+Bt) wettable powder

Azadirachtin content 20% (weight)

Bt content 2% (weight)

Wetting agent 10% (weight)

Dispersant 20% (weight)

Preservatives 1.0% (weight)

Filler 47% (weight)

Embodiment seven: produce 45% (azadirachtin+Bt) wettable powder

Azadirachtin content 1% (weight)

Bt content 44% (weight)

Wetting agent 5% (weight)

Dispersant 19% (weight)

Preservatives 1% (weight)

Filler 30% (weight)

Embodiment eight: produce 50% (azadirachtin+Bt) wettable powder

Azadirachtin content 3% (weight)

Bt content 47% (weight)

Wetting agent 10% (weight)

Dispersant 20% (weight)

Preservatives 1.5% (weight)

Filler 18.5% (weight)

The beneficial effects of the present invention are as follows:

1. In the process of preparing azadirachtin+Bt wettable powder preparation, the present invention solves the problem of azadirachtin+Bt wettable powder preparation in depth by adding a variety of wetting agents, dispersants, preservatives and fillers for selection. Poor dispersion performance, easy to pollute and other problems.

2. After the azadirachtin and Bt are mixed according to the aforementioned selected ratio, not only the advantages of the biopesticide itself are maintained, but also the dosage of the mixture is reduced, and the drug effect is greatly improved, which makes up for the azadirachtin botanical insecticide. The weak point of poor stomach poisoning effect on lepidopteran pests. The mixture has far-reaching significance for the development and application of natural insecticides.

3. Azadirachtin and Bt are two types of insecticides with different mechanisms of action. The mixed azadirachtin + Bt wettable powder formulation not only expands the spectrum of pest control, but also has a more uniform drug effect on simultaneous pests , so as to delay or even overcome the resistance of the dominant species after the succession of the pest population. The application effect of the mixture is particularly remarkable in the process of controlling resistant diamondback moth on vegetables.

4. Due to the reasonable compatibility and ratio of the various substances required for the preparation of azadirachtin+Bt wettable powder preparations, it can greatly reduce the poisonous effect on the natural enemies of various pests that are killed, and the damage and pollution to the ecological environment are small. Conducive to the protection of human and animal safety. It is a kind of azadirachtin mixture that can prevent and control various agricultural and forestry pests, has little toxic effect, and can overcome the resistance of pests.

Claims (8)

1. Azadirachtin and Bt wettable powder preparation formed by mixing azadirachtin and Bt is characterized in that the content ratio of each component in the mixed pesticide preparation is by weight: azadirachtin content is 0.1-35 %; Bt content is 0.5-50%; wetting agent content is 1-20%; dispersant content is 7-30%; preservative content is 0.1-2.9%; filler content is 15-75%; is 100%. 2. the mixed pesticide azadirachtin and Bt wettable powder preparation according to claim 1, is characterized in that described wetting agent component is selected from: lignosulfonate, alkylbenzenesulfonate, Any one or more of pull-off powder and polysorbate. 3. the mixed pesticide azadirachtin and Bt wettable powder preparation according to claim 1, is characterized in that described dispersant component is selected from: naphthalene sulfonate, alkyl sulfonate, polyoxyethylene Any one or more of base ether sulfonate and diisopropyl phosphate. 4. The mixed pesticide azadirachtin and Bt wettable powder formulation according to claim 1, characterized in that the preservative is: activated carbon. 5. The mixed pesticide azadirachtin and Bt wettable powder formulation according to claim 1, characterized in that the filler component is selected from any one or more of kaolin, diatomaceous earth, and activated carbon. 6. the mixed pesticide azadirachtin and Bt wettable powder preparation according to claim 1 is characterized in that the proportioning ratio of each component content in the mixed pesticide wettable powder preparation is by weight: azadirachtin content is 0.3- 20%; Bt content 1-1.5%; wetting agent content 5-15%; dispersant content 10-25%; preservative content 1-1.5%; filler content 45-65%; The sum is 100%. 7. The wettable powder mixed with azadirachtin and Bt according to claim 1 is characterized in that each component content is by weight: azadirachtin content is 1%; Bt content is 44%; wetting agent content 5%; dispersant content is 19%; preservative content is 1%; filler content is 30%. 8. The wettable powder mixed with azadirachtin and Bt according to claim 1, wherein the content of each component is by weight: azadirachtin content is 3%; Bt content is 47%; wetting agent content 10%; dispersant content 20%; preservative content 1.5%; filler content 18.5%.