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Sustained releasing pesticide granule

A technology for slow-release pesticides and granules, applied in the field of pesticides, can solve problems such as dispersion of active ingredients, and achieve the effects of low cost, reduced application times, and reduced spraying costs.

Inactive Publication Date: 2007-04-25
BEIJING AGRI TECH PROMOTION STATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the granules of the conventional dosage form are applied around the rhizosphere of plants, in some cases, an excessive amount of the active ingredient will be dispersed around the roots of the plants, resulting in phytotoxicity of the plants and the effect of the medicine is only maintained for a relatively short period of time.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Example 1 Preparation of uncoated sustained-release imidacloprid granules

[0046] a) Add 100 grams of α-cyclodextrin to 400 grams of water, gelatinize at 80°C for 120 minutes, and keep stirring during the heating process;

[0047] b) The gelatinized α-cyclodextrin in (a), 20 grams of imidacloprid, 5 grams of sodium dioctyl sulfosulfonate and 5 grams of formaldehyde were stirred and mixed at 3000 rpm at 20° C. for 5 minutes.

[0048] c) Next, the mixture obtained in (b) was left to gel at 25° C. for 8 hours, then dried in an oven at a temperature of 75° C., and then pulverized.

[0049] d) the product of step (c), 1820 grams of bentonite and 50 grams of polyvinyl alcohol are granulated by a disk granulator, and its rotating speed is 90 rpm, and the particles of the required particle size are obtained by screening through a classifying sieve. These granules are then dried.

[0050] A 1% uncoated sustained-release imidacloprid granule was obtained.

Embodiment 2

[0051] Example 2 Preparation of coated sustained-release imidacloprid granules

[0052] a) Add 100 grams of hydroxymethyl starch to 400 grams of water, gelatinize at 30° C. for 120 minutes, and stir continuously during the heating process;

[0053] b) The hydroxymethyl starch gelatinized in (a), 20 grams of imidacloprid, 20 grams of sodium lignosulfonate and 5 grams of formaldehyde were stirred and mixed at 3000 rpm for 5 minutes at 20° C.

[0054] c) Next, the mixture obtained in (b) was gelled at 25° C. for 8 h, then oven-dried at a temperature of 75° C., and then pulverized.

[0055] d) the product of step (c), 1000 grams of clay, 650 grams of potassium chloride and 50 grams of polyvinyl alcohol are passed through a disc granulator granulation container at a speed of 90 revolutions per minute, and passed through a grading sieve to screen to obtain the obtained Granules of desired size are then dried.

[0056] e) Take by weighing 60 grams of castor oil and 60 grams of soyb...

Embodiment 3

[0058] Example 3 Preparation of Uncoated Sustained Release Uniconazole Granules

[0059] a) Add 100 grams of sulfate-modified starch to 125 grams of water, gelatinize at 40° C. for 60 minutes, and keep stirring during the heating process;

[0060] b) Stir the sulfated modified starch gelatinized in (a), 10 grams of uniconazole, 20 grams of sodium lignosulfonate and 10 grams of formaldehyde at 50° C. at 1000 rpm, and mix for 10 minutes.

[0061] c) Next, the mixture obtained in (b) was gelled at 10° C. for 4 h. It was then oven-dried at a temperature of 60° C., and then pulverized.

[0062] d) the product of step (c), 900 grams of superphosphate, 600 grams of ammonium bicarbonate, 260 grams of potassium chloride and 100 grams of attapulgite powder are passed through the disc granulator granulation container, and the rotating speed is at 60 rpm, Through the grading sieve, the particles with the required particle size are screened, and these particles are then dried.

[0063] ...

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PUM

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Abstract

The invention relates to a slow-release pesticide granula, formed by pesticide active compound, modify amidon, powder and assist agents. Wherein, the invention also provides relative application; the granula can control the active component to be released to condition at preset speed; therefore, the invention can function the plant one time to control their growth in whole season.

Description

technical field [0001] The invention relates to the field of pesticides, in particular to a slow-release pesticide granule and an application method thereof. Background technique [0002] According to the release characteristics of the active ingredients of pesticides, pesticide dosage forms can be divided into two categories: free-release conventional type and controlled-release type. The effective rate of conventional pesticides is only 20-30%, and the loss rate through various channels is as high as 50-60%, which is not only a waste in economy, but also causes serious environmental pollution. Therefore, controlling the release quantity, release time and release space has always been an important direction in the research of new formulations of chemical pesticides. The core of the controlled release technology is to make the polymer compound interact with the pesticide, and the active ingredients of the pesticide will be continuously and slowly released into the environme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/12A01N25/10
Inventor 周春江李松林田晓莉刘西莉恽友兰
Owner BEIJING AGRI TECH PROMOTION STATION
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