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Preparation method of microencapsulated powder for controlling root-knot nematodes of vegetables in greenhouses

A technology of microcapsule powder and root-knot nematodes, which is applied in nematicides, botanical equipment and methods, biocides, etc., can solve the problems of short duration, limited diffusion performance, high toxicity, etc., and extend the duration , Ease of use

Inactive Publication Date: 2016-06-29
NANTONG QINGANJIAN WATERLESS PRINTING & DYEING INST GENERAL PARTNER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Abamectin is a macrolide compound, which is easy to be adsorbed by soil particles in the soil, and its diffusion performance is greatly limited
Due to the rich microorganisms and complex chemical composition in the soil, pesticides degrade quickly in the soil and have a short duration
The disinfection cost of methyl bromide gas is high, the toxicity is high, and the actual operation is very difficult
At present, the average cost per mu of greenhouse vegetables to control root-knot nematodes is about 300-400 yuan, and the control effect is not ideal.

Method used

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  • Preparation method of microencapsulated powder for controlling root-knot nematodes of vegetables in greenhouses
  • Preparation method of microencapsulated powder for controlling root-knot nematodes of vegetables in greenhouses

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Diflubenzuron 100kg is pulverized and sieved with a high-speed pulverizer, and the particle size reaches 100 orders for use. Drop into 40kg of abamectin in the reaction kettle, 5kg of dichloromethane stirs, and dichloromethane wets the abamectin, adds diflubenzuron in the reaction kettle, and continues to stir so that the abamectin is evenly adhered to Diflubenzuron granules. Then add 1400 kg of polyvinyl alcohol aqueous solution with a content of 1%, keep the temperature at 60° C., stir for 40 minutes, and spray dry to obtain microcapsule powder pesticide. During spray drying, the inlet air temperature is controlled between 120-300°C, and the outlet air temperature is controlled at 50-200°C.

[0024] After mixing the microcapsule powder pesticide prepared in this example with fine dry soil, it is applied in furrows and tested.

[0025] Table 1 Control test of microcapsule powder pesticides on Chinese cabbage root-knot nematode

[0026]

[0027] The above comparat...

Embodiment 2

[0030] Take 200 kg of diflubenzuron, and 200 kg of methyl oleate are ball milled to 180 mesh. Add 40kg of abamectin and 100kg of benzoate to the reaction kettle. After heating and dissolving, add diflubenzuron into the reaction kettle, then add surfactant Tween 80#10kg, and dodecylbenzenesulfonate 5 kg of sodium bicarbonate, heated to 55 ° C and stirred, then added 450 kg of 2% polyvinyl alcohol aqueous solution, kept stirring, and carried out encapsulation reaction at 55 ° C for 1 hour to obtain a mixed solution; the above mixed solution was spray-dried to remove excess water to obtain Microencapsulated powder pesticides.

[0031] After mixing the microcapsule powder pesticide prepared in this example with fine dry soil, it is applied in furrows and tested.

[0032] Table 2 Control test of microcapsule powder pesticides on root-knot nematode of cabbage

[0033]

[0034] The above comparative example uses the same amount of diflubenzuron, abamectin and fine dry soil ratio...

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Abstract

The invention provides a preparation method of microencapsulated powder for controlling root-knot nematodes of vegetables in greenhouses. The method comprises the following steps: (1) 70-100 parts by mass of a chitinase inhibitor and 10-40 parts of by mass abamectin or emamectin benzoate are taken; (2) the chitinase inhibitor is ground and smashed until the particle size is larger than or equal to 100 meshes; (3) abamectin or emamectin benzoate is put into a reactor, and then an organic solvent is added and uniformly stirred; (4) the ground chitinase inhibitor in the step (2) is put into the reactor, then a surfactant is added to the reactor, a polyvinyl alcohol aqueous solution is added finally, a capsule forming reaction is performed, stirring is kept in the step, and a pesticide emulsion is prepared; (5) the pesticide emulsion obtained in the step (4) is dried, and a microencapsulated powder pesticide is obtained. The microencapsulated powder pesticide prepared with the method can effectively control the root-knot nematodes.

Description

technical field [0001] The invention relates to a method for manufacturing a microcapsule powder pesticide for preventing and controlling root-knot nematode of vegetables in greenhouses, and belongs to the technical field of pesticide manufacturing in the chemical industry. Background technique [0002] Greenhouse vegetable root-knot nematode is an ancient primitive organism. It has not changed much for hundreds of millions of years, and there is no nervous system in the worm body, only a very small number of neuron cells. In recent years, root-knot nematodes have rapidly spread from south to north, and root-knot nematodes can be detected in the soil of vegetable greenhouses in most of the country. Root-knot nematodes reproduce in the soil, and the temperature and humidity in the greenhouse are relatively stable. Especially in winter, the temperature in the greenhouse is generally between 15°C and 25°C, which is very conducive to the activity of root-knot nematodes. [000...

Claims

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Application Information

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IPC IPC(8): A01N47/34A01N43/90A01N25/28A01P5/00
CPCA01N25/28A01N43/90A01N47/34A01N2300/00
Inventor 仲伟德
Owner NANTONG QINGANJIAN WATERLESS PRINTING & DYEING INST GENERAL PARTNER