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Abamectin B2 capsule suspension for preventing and treating root-knot nematode and preparation method of abamectin B2 capsule suspension

A technology of microcapsule suspending agent and abamectin, applied in the directions of nematicides, botanical equipment and methods, biocides, etc., can solve the problem of inability to perform better application, low content of microcapsules, poor controlled release performance, etc. question

Active Publication Date: 2019-03-22
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the abamectin B prepared by the traditional method 2 The content of microcapsules is low, and the controlled release performance is poor, so it cannot be used better

Method used

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  • Abamectin B2 capsule suspension for preventing and treating root-knot nematode and preparation method of abamectin B2 capsule suspension
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  • Abamectin B2 capsule suspension for preventing and treating root-knot nematode and preparation method of abamectin B2 capsule suspension

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] 5% Abamectin B 2 The dosage of each component of the microcapsule aqueous suspension is shown in Table 1.

[0056] Table-1 5% Abamectin B 2 The dosage of each component of the microcapsule aqueous suspension

[0057]

[0058] 5g Abamectin B 2 The original drug is mixed with 20g xylene to dissolve the original drug, then add 2g modified IPDI (Evonik), 3g modified MDI (Bayer) and stir and mix, add emulsifier NP-10 3g, stir to obtain an oil phase; 2700 (Huntsman) was dispersed in 60.7 g of deionized water to obtain a water phase; at a shear rate of 10000 rpm, the oil phase was poured into the water phase to obtain an oil-in-water emulsion. At 300rpm of the emulsion, add triethylamine dropwise. After the dropwise addition, the system is heated to 50°C, kept warm for 2 hours, and reacted to the end; add 0.1g of thickener, 3g of antifreeze, 0.1g of preservative, and 0.1g of defoamer g, stir and disperse evenly to get 5% Abamectin B 2 Microcapsules in water suspension. ...

Embodiment 2

[0060] 10% Abamectin B 2 The dosage of each component of the microcapsule aqueous suspension is shown in Table 2.

[0061] Table-2 1% Abamectin B 2 The dosage of each component of the microcapsule aqueous suspension

[0062]

[0063] 10g Abamectin B 2 The original drug, 10g of dichloromethane, and 10g of N,N-dimethyldecylamide were mixed and dissolved, then 8g of modified TDI (Bayer) was added and stirred, and emulsifier AEO-10 ​​3g was added, and stirred evenly to obtain an oil phase; SC (Solvay) was dispersed in 55.8g deionized water to obtain a water phase; at a shear rate of 8000rpm, the oil phase was poured into the water phase to obtain an oil-in-water emulsion. At 300rpm of the emulsion, triethylenetetramine was added dropwise. After the dropwise addition, the system was heated to 60°C, kept warm for 3 hours, and reacted to the end; 1g thickener, 3g antifreeze, 0.1g preservative, and 0.1 g, stir and disperse evenly to get 10% Abamectin B 2 Microcapsules in wat...

Embodiment 3

[0065] 15% Abamectin B 2 The dosage of each component of the microcapsule aqueous suspension is shown in Table 3.

[0066] Table-3 15% Abamectin B 2 The dosage of each component of the microcapsule aqueous suspension

[0067]

[0068] 15g Abamectin B 2 The original drug, 10g N-methylpyrrolidone, and 10g ethyl acetate are mixed and dissolved, then add 2g TDI (Bayer), 6g MDI (Dow) and stir evenly, add emulsifier BY-125 2.5g, stir evenly to obtain an oil phase; NNO was dissolved in 48.2g deionized water to obtain a water phase; at a shear rate of 12000rpm, the oil phase was poured into the water phase to obtain an oil-in-water emulsion. Add glycerol dropwise to the emulsion at 200rpm. After the dropwise addition, the system is heated up to 60°C, kept warm for 4 hours, and reacted to the end; add thickener 0.1g, antifreeze 3g, preservative 0.1g, defoamer 0.1 g, stir and disperse evenly to get 15% Abamectin B 2 Microcapsules in water suspension.

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Abstract

The invention discloses abamectin B2 capsule suspension for preventing and treating root-knot nematode and a preparation method of the abamectin B2 capsule suspension. The abamectin B2 capsule suspension can be prepared into abamectin B2 aqueous capsule suspension or abamectin B2 oil capsule suspension; water-based capsule suspension and oil-based capsule suspension are prepared by respectively taking polyurethane, polyurea, chitosan and modified chitosan as wall materials according to three different methods; prepared capsules have the advantages of high content, good appearance, high encapsulated ratio and coating rate and good controlled release property. According to the method, the stability of abamectin B2 is improved, and the abamectin B2 moves in soil more easily and is long in lasting period; in addition, by adding an environment-friendly oily medium, penetration and absorption of the abamectin B2 in a crop root system are better benefited; compared with the traditional preparation, the abamectin B2 capsule suspension has good preventing and treating effects.

Description

technical field [0001] The invention relates to the field of pesticide preparation processing, in particular to a kind of abamectin B for preventing and treating root-knot nematode 2 Microcapsule suspension and its preparation method. Background technique [0002] Root-knot nematode is a kind of plant parasitic nematode disease that is extremely difficult to control. It hosts more than 3,000 species of plants. Generally, it can cause a 10-20% yield reduction, and in severe cases it can reach 30-40%, or even extinction. The economic losses caused by nematodes reach hundreds of millions of yuan every year, and root-knot nematodes have become one of the serious obstacles affecting the yield and quality of agricultural products. Traditional control methods are mainly chemical control, and highly toxic pesticides occupy an important position. However, with the enhancement of people's awareness of environmental protection and higher requirements for the safety of agricultural pro...

Claims

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Application Information

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IPC IPC(8): A01N25/28A01N43/90A01N43/16A01P5/00
CPCA01N25/28A01N43/16A01N43/90
Inventor 吴学民徐勇
Owner CHINA AGRI UNIV
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