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Microcapsule suspending agent containing spinosad and cyantraniliprole, and preparation method thereof

A technology of microcapsule suspension and cyantraniliprole, which is applied in the direction of insecticides, botanical equipment and methods, and biocides, and can solve problems such as hindering drug efficacy, insufficient insecticidal spectrum, and large dispersion of drug particles. , to achieve the effect of safe storage, transportation and use, good control effect, and extended duration

Inactive Publication Date: 2013-02-27
上海沪联生物药业(夏邑)股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Insecticides with a single active component often have different degrees of defects in the control of agricultural pests: continuous use is prone to resistance, the insecticidal spectrum is not wide enough, it causes greater pollution to the environment, and cannot provide comprehensive protection for crops, etc.
However, it has been found in practical applications that the compound suspending agent disclosed in the application has the disadvantage of poor physical stability, because the suspending agent disclosed in the application belongs to a common suspending agent, which is a thermodynamically unstable coarse dispersion system. Large, the active ingredient particles have a higher surface free energy and are in an unstable state, which hinders the efficacy of the drug; in addition, the active ingredient particles in the suspensions disclosed in this application are generally between 0.5 and 10 μm, and the smaller ones can be It is 0.1 μm, and the larger one can reach 50 μm or more. Because the dosage form exists in the form of solid particles after being sprayed on the crop surface, the compound suspension concentrate disclosed in this application faces the major defects that the active ingredients are easy to lose and difficult to adhere.

Method used

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  • Microcapsule suspending agent containing spinosad and cyantraniliprole, and preparation method thereof
  • Microcapsule suspending agent containing spinosad and cyantraniliprole, and preparation method thereof
  • Microcapsule suspending agent containing spinosad and cyantraniliprole, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1: 2.5% spinosad · cyantraniliprole microcapsule suspension

[0038] Add urea and formaldehyde into a three-necked flask equipped with a thermometer and a stirring device, urea: formaldehyde = 1: 1.5 (molar ratio), adjust the pH = 8 with triethanolamine, raise the temperature to 70 ° C, stir at a low speed for 1 hour, and then dilute with water to form The stable prepolymer aqueous solution containing 10% mass percentage of capsule wall material. Dissolve 1.0 g of spinosyn technical drug and 1.5 g of cyantraniliprole technical drug in 2.5 g of N,N-dimethylformamide at room temperature, add 3 g of sodium lignosulfonate, 1 g of gum arabic and 50 g of The above-mentioned urea-formaldehyde prepolymer aqueous solution (containing 5 g of capsule wall material) was stirred at a high speed of 1200 rpm for 1 hour, and after a stable emulsion was formed, the rotational speed was reduced to 600 rpm, and hydrochloric acid solution was added to adjust the pH value to 2.5, an...

Embodiment 2

[0039] Example 2: 5% spinosad · cyantraniliprole microcapsule suspension

[0040] Using the same method as in Example 1, a urea-formaldehyde prepolymer aqueous solution was prepared. At room temperature, dissolve 1.6 g of spinosyn technical drug and 3.4 g of cyantraniliprole technical drug in 2 g of cyclohexanone, add 1 g of gelatin, 2 g of polyoxyethylene polyoxypropylene block copolymer and 49 g of the above-mentioned Aqueous solution of urea-formaldehyde prepolymer (containing 5.6g of capsule wall material), stirred at a high speed of 1200 rpm for 1 hour, reduced the rotational speed to 600 rpm after forming a stable emulsion, added hydrochloric acid solution to adjust the pH value to 2.5, polymerized React for 2 hours, then add 1g of hydrochloric acid and 40g of water, stir evenly to make 5% spinosad · cyantraniliprole microcapsule suspension.

Embodiment 3

[0041] Example 3: 10% spinosad · cyantraniliprole microcapsule suspension

[0042] Using the same method as in Example 1, a urea-formaldehyde prepolymer aqueous solution was prepared. At room temperature, dissolve 5 g of spinosad and 5 g of cyantraniliprole in a mixture of 5 g of xylene and 5 g of cyclohexanone, and add 0.5 g of polyvinyl alcohol and 3.5 g of lignosulfonic acid while stirring. Sodium and 40g of the above-mentioned urea-formaldehyde prepolymer aqueous solution (including 3g of capsule wall material) were stirred at a high speed of 1200 rpm for 1 hour, and after a stable emulsion was formed, the speed was reduced to 600 rpm, and hydrochloric acid solution was added to adjust the pH value to 2.5, polymerize for 2 hours, then add 1g of triethanolamine and 35g of water, stir evenly to make 10% spinosad · cyantraniliprole microcapsule suspension.

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Abstract

The invention relates to a microcapsule suspending agent containing spinosad and cyantraniliprole, and a preparation method thereof. The microcapsule suspending agent is mainly composed of spinosad, cyantraniliprole, a capsule wall material, a water-soluble monomer, a dispersing agent, a protective agent, a capsule heart solvent and water. The recovery rate of the obtained microcapsule suspending agent is over 98%; embedding efficiency is higher than 95%; the microcapsules is regular spheres; the particle size is 0.5-5 [mu]m; and the appearance is similar to that of a conventional pesticide suspending agent. The microcapsule suspending agent can be directly mixed with water to carry out spraying. Indoor and field experiments show that the microcapsule suspending agent containing spinosad and cyantraniliprole has very good preventing and treating effects for white flies and thrips on cucumber, paddy rice, cotton and hairy melons, compared with missible oil and a suspending agent; lasting period is significantly prolonged; and the cost is lower than that of missible oil and other preparations. Besides, the microcapsule suspending agent containing employs water as a dispersing medium, has low usage amount of an organic solvent, is safe in storage transportation and use, and reduces pollutions to the environment.

Description

technical field [0001] The invention belongs to the technical field of compound pesticides, in particular to a microcapsule suspension containing spinosyn and cyantraniliprole and a preparation method thereof. Background technique [0002] Spinosad (Spinosad), molecular formula: C 41 h 65 NO 10 (spinosyn A)+C 42 h 67 NO 10 (spinosyn D). Structural formula: [0003] [0004] Spinosad is considered to be the effector of the nicotinic acid acetylcholine receptor, which can continuously activate the target insect acetylcholine nicotinic receptor, but its binding site is different from that of nicotine and imidacloprid. It can quickly paralyze and paralyze the pests, and finally lead to death. Its insecticidal speed is comparable to that of chemical pesticides. It has high safety and no cross-resistance with currently commonly used insecticides. It is a low-toxicity, high-efficiency, and low-residue biopesticide. Suitable for pollution-free vegetables and fruit produ...

Claims

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Application Information

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IPC IPC(8): A01N43/56A01N43/22A01N25/28A01N25/04A01P7/04
Inventor 司贤良
Owner 上海沪联生物药业(夏邑)股份有限公司
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