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Water floating type pesticide controlled-release granule carrier and applications thereof

A water surface floating and controlled release technology, which is applied in the fields of agricultural gas emission reduction, chemicals for biological control, application, etc., can solve the problems of fast release of active ingredients, weak adsorption, and influence on drug efficacy, etc.

Inactive Publication Date: 2014-12-10
SHAOXING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above existing problems, the present invention provides a water-floating pesticide controlled-release granular carrier and its application to overcome the relatively weak adsorption of organic pesticides by the floating carrier in the prior art, and the rapid release of active ingredients, which affects drug production. Therefore, it is possible to obtain a granular carrier that can float on the water surface for a long time and can control the release rate of the active ingredient of the pesticide, and can be used to prepare a pesticide granular formulation that can be directly applied in paddy fields

Method used

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  • Water floating type pesticide controlled-release granule carrier and applications thereof
  • Water floating type pesticide controlled-release granule carrier and applications thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Weigh 500g of dry corn stalks, crush them and put them into several crucibles in batches, cover the crucibles, put them into a muffle furnace, heat up to 350°C, keep them warm for 3 hours, and cool down the crucibles to room temperature, then take them out of the crucibles Residual solid carbonaceous material. Add hydrochloric acid with a concentration of 2mol / L at a ratio of 20mL / g carbonaceous material, soak continuously for 24h and then filter with suction, dry the filtered solid matter, crush and sieve (<0.10mm), and obtain 105g of acidified biocarbonaceous material .

[0036]Take 50g of acidified biological carbonaceous material, mix them with 10g of sodium bicarbonate and 2g of sodium lignosulfonate respectively, spray the binder aqueous solution containing 2g of sodium alginate to obtain wet powder, and use a swing granulator to produce Particles with an average particle diameter of about 0.30 mm are dried to obtain a granular carrier.

[0037] Take 1g (m0) of ...

Embodiment 2

[0041] Get 50g of the acidified biological carbonaceous material material described in Example 1, after mixing evenly with 10g sodium bicarbonate and 2g sodium lignosulfonate respectively, mix in 15g of bensulfuron-methyl original drug, spray with 2g of sodium alginate Binder aqueous solution to obtain wet powder, using a swing granulator to obtain bensulfuron-methyl granules with an average particle size of about 0.30 mm, and drying to obtain bensulfuron-methyl granule preparations. The content of bensulfuron-methyl in the granular preparation was determined to be 18.0% by sampling.

[0042] Get bensulfuron-methyl granule 40mg (benzsulfuron-methyl content is 7.2mg (M 0 )) into a stoppered Erlenmeyer flask filled with 300mL of distilled water. Place the Erlenmeyer flask in a 25°C water bath and shake at constant temperature. After a certain time interval, water samples were taken to analyze the concentration of bensulfuron-methyl, and the mass M of bensulfuron-methyl release...

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Abstract

The invention discloses a water floating type pesticide controlled-release granule carrier and applications thereof. An acidified biochar material is adopted as a water floating agent and controlled-release agent, basic carbonate is adopted as a water floating auxiliary, a water-soluble polymer viscous material is adopted as a binder for granule forming, a surfactant structurally containing hydrophile anion group and a hydrophobic carbon chain is adopted as a diffusant capable of promoting active ingredients to be evenly distributed on a water surface, so that the problems that the adsorption action of the floating carriers in the prior art to organic pesticide is relatively weak, and the release of the active ingredients is fast to affect the pesticide effect can be overcome, the granule carrier which can float on the water surface for a long time and can control the release rate of the active ingredients in a pesticide can be obtained, and the granule carrier is used for preparing a pesticide granule preparation which can be directly broadcast in a paddy field.

Description

technical field [0001] The invention relates to the field of pesticide preparations, in particular to a water-surface-floating pesticide controlled-release granular carrier and its application. Background technique [0002] Most of the existing pesticide preparations for paddy fields are traditional formulations such as emulsifiable concentrates, powders, and granules. Since the density of most pesticide active ingredients and carriers (such as silicate clay) is greater than water, they will sink to the bottom of the water soon after application, resulting in inconsistent release positions of pesticide active ingredients and target action sites, affecting the efficacy of pesticides. For example, after some herbicides absorbed by stems and leaves sink into the bottom of the water, the active ingredients are absorbed by the bottom sediments and cannot exert the weeding effect. At the same time, the active ingredients in some preparations are released quickly, and are prone to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/08A01N25/12A01N47/36A01P7/00A01P13/00A01P3/00A01P21/00
CPCY02A40/22Y02P60/21
Inventor 李建法李赛君吕金红李益民
Owner SHAOXING UNIVERSITY
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