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Microcapsule suspension seed-coating agent

A technology of microcapsule and film-forming agent, which is applied in the field of agricultural microcapsule suspended seed coating, can solve the problems of short duration of medicine and the like

Inactive Publication Date: 2009-02-04
INST OF PLANT PROTECTION CHINESE ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the current commercialized insecticides and fungicides, the persistence period of the medicament is generally relatively short, and the persistence period of most of the medicaments on the crop surface or in the crop body is about 7-15 days, such as abamectin. The persistence period of vegetables against cabbage caterpillar and diamondback moth is 10-15 days (Xu Xiaolong, Gu Zhongyan, Han Lijuan, 2002, 4, 39-44). The validity period is 15 days (Kan Libin, Jiang Haiping, Chen Yingchun, Pesticide Science and Management, 2008, 29(5), 32 / 49)

Method used

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  • Microcapsule suspension seed-coating agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Step 1 Microcapsule Preparation

[0029] 1.0 grams of avermectin, 2.5 grams of imidacloprid, 2.0 grams of tebuconazole, and 5.5 grams of polystyrene were dissolved in 50 milliliters of dichloromethane, and they were added to 1000 milliliters containing 1.5% hydroxyethyl cellulose and 1.2% polystyrene while stirring. Nongru 600# aqueous solution. Use a high-speed shear emulsifier to emulsify it until the emulsion droplets are 1-5 microns.

[0030] First, the above emulsion was mechanically stirred at room temperature for 3 hours to volatilize most of the dichloromethane, and then slowly heated to 40° C. to completely volatilize the remaining dichloromethane. Centrifuge, remove the supernatant, and then wash 3 times with deionized water to obtain microcapsules containing abamectin imidacloprid tebuconazole, the total amount of abamectin imidacloprid tebuconazole in the microcapsules is 50.0%.

[0031] The second step microcapsule water-based suspension

[0032] Add 1....

Embodiment 2

[0034] Step 1 Microcapsule Preparation

[0035] 5.0 grams of fipronil, 2.0 grams of imidacloprid, 3.0 grams of tebuconazole, and 10.0 grams of polymethyl methacrylate were dissolved in 100 milliliters of dichloromethane, and added to 2000 milliliters of 1.3% polyvinyl alcohol and 1.5% pesticides while stirring. Milk 603# aqueous solution. Use a high-speed shear emulsifier to emulsify it until the emulsion droplets are 1-5 microns.

[0036] First, the above emulsion was mechanically stirred at room temperature for 4 hours to volatilize most of the dichloromethane, and then slowly heated to 40° C. to completely volatilize the remaining dichloromethane. Centrifuge, remove the supernatant, and then wash with deionized water 3 times to obtain microcapsules containing fipronil, imidacloprid, tebuconazole, the total amount of fipronil, imidacloprid, tebuconazole in the microcapsules is 50.0 %.

[0037] The second step microcapsule water-based suspension

[0038] Add 2.3 grams of ...

Embodiment 3

[0040] Step 1 Microcapsule Preparation

[0041] Dissolve 1.0 grams of fipronil, 10.0 grams of chlorpyrifos, 3.0 grams of difenoconazole, and 14.0 grams of polystyrene-maleic anhydride alternating copolymer in 150 milliliters of chloroform, and add to 2500 milliliters containing 1.7% Hydroxypropyl cellulose and 1.0% Nongru 0203 aqueous solution. Use a high-speed shear emulsifier to emulsify it until the emulsion droplets are 1-5 microns.

[0042] Stir the above emulsion mechanically at room temperature for 10 minutes, heat to 40°C within 1 hour, and then slowly raise the temperature to 61°C to completely volatilize the remaining chloroform. Centrifuge, remove the supernatant, and wash with deionized water for 3 times to obtain the microcapsules containing fipronil·chlorpyrifos·difenoconazole, the content of fipronil·chlorpyrifos·difenoconazole in the microcapsules The total amount is 50.0%.

[0043] The second step microcapsule water-based suspension

[0044] Add 1.7 grams of...

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Abstract

The invention relates to a suspension seed coating which comprises an insecticide and a bactericide. In the suspension seed coating, active ingredients with insecticidal and bactericidal activity exist in a microcapsule. After the seeds coated by the microencapsulated seed coating are sown, the active ingredients can be slowly released, thus prolonging the effect lasting period of the active ingredients.

Description

technical field [0001] The invention relates to an agricultural microcapsule suspension seed coating agent with the property of resisting diseases and insect pests. Background technique [0002] Seed treatment of crop seeds before sowing is a very important plant protection measure, and seed coating in seed treatment measures has attracted more and more attention from growers and plant protection researchers, because seed coating is relatively Compared with other seed treatment measures such as chemical seed dressing, the agent is more firmly coated on the surface of the seed, and the shedding rate of the agent is lower. [0003] The promotion and application of seed coating technology provides a very reliable and effective control method for the control of crop seed-borne diseases and underground pests, and has made great contributions to improving the germination rate of seeds and reducing the damage of crop seedlings from pests and diseases at the seedling stage. contrib...

Claims

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Application Information

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IPC IPC(8): A01N25/28A01N43/56A01N57/16A01N43/90A01C1/06A01P7/00A01P3/00
Inventor 杨代斌袁会珠闫晓静董丰收
Owner INST OF PLANT PROTECTION CHINESE ACAD OF AGRI SCI
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