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Herbicide effervescent tablets and preparation method thereof

An effervescent tablet and effervescent tablet technology, applied in the field of herbicide composition and its preparation, to achieve the effects of accurate measurement, convenient use, and less resistance

Active Publication Date: 2011-09-14
GUANGXI RES INST OF CHEM IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention provides a synergistic, broad-spectrum, and difficult-to-resistance pesticide compound preparation for the deficiencies of the prior art, and processes the compound preparation into an effervescent tablet, which can be used once in agricultural production to prevent and control rice field weeds. Weed hazards, overcome the time-consuming and labor-intensive shortcomings of farmers spreading herbicides mixed with soil under the existing technical conditions, saving time and labor

Method used

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  • Herbicide effervescent tablets and preparation method thereof

Examples

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Comparison scheme
Effect test

example 1

[0038] 20% chlorpyrazosulfuron-pretilachlor effervescent tablet: the selection and proportioning of the original drug and additives are as follows: chlorpyrazosulfuron-methyl 2%, pretilachlor 18%, citric acid 9%, sodium bicarbonate 12% %, 3% sodium methylenebisturide sulfonate, 4% sodium lignosulfonate, 13% lactose, 8% talc, and the filler white carbon black makes up to 100%.

[0039] Based on the preparation of 100 kg of samples, the dosage of each component is calculated and weighed according to the above proportions. Prepared by direct dry compression method, the method is as follows:

[0040] First accurately weigh 30.15 kg of white carbon black, absorb 18.75 kg of 96% pretilachlor with white carbon black, then weigh 2.1 kg of 95% chlorpyrazosulfuron-methyl, 9 kg of citric acid, 12 kg of sodium bicarbonate, 3 kg of Sodium methyl bis-tetrasulfonate, 4 kg of sodium lignosulfonate, 13 kg of lactose, 8 kg of talcum powder, then mix all the materials evenly and then crush them...

example 2

[0043] 10% chlorpyrazosulfuron-pretilachlor effervescent tablet: the selection and proportioning of the original drug and additives are as follows: chlorpyrazosulfuron-methyl 1%, pretilachlor 9%, citric acid 9%, sodium bicarbonate 12% %, 3% sodium methylenebisturide sulfonate, 4% sodium lignosulfonate, 13% lactose, 8% talc, and the filler white carbon black makes up to 100%.

[0044] Based on the preparation of 100 kg of samples, the dosage of each component is calculated and weighed according to the above proportions. Prepared by wet granulation and then tabletting, the method is as follows:

[0045] (1) first accurately weigh 40.575 kilograms of white carbon black, absorb 9.375 kilograms of 96% pretilachlor with white carbon black, then take by weighing 1.05 kilograms of 95% chlorpyrazosulfuron-methyl, 3 kilograms of sodium methylene bis-tetrasulfonate, 4 kg of sodium lignosulfonate, 13 kg of lactose, and 8 kg of talcum powder were used to pulverize the mixture to 200 mesh ...

example 3

[0051] 25% chlorpyrazosulfuron-pretilachlor effervescent tablet: the selection and proportioning of the original drug and additives are as follows: chlorpyrazosulfuron-methyl 2%, pretilachlor 23%, citric acid 9%, sodium bicarbonate 12% %, 3% sodium methylenebisturide sulfonate, 4% sodium lignosulfonate, 10% lactose, and filler silica to make up to 100%.

[0052] Calculate and weigh the dosage of each component according to the above proportioning ratio. It is prepared by the direct dry compression method, and the specific process is the same as in Example 1.

[0053] Applying 80 grams of 25% chlorpyrazosulfuron-pretilachlor effervescent tablet per mu can effectively control a variety of broadleaf, Cyperaceae and Gramineae weeds in the throwing seedling field, and the total fresh weight control effect reaches 96.8%.

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Abstract

The invention discloses herbicide effervescent tablets containing halosulfuronmethyl and pretilachlor and a preparation method thereof. The active ingredients of the herbicide effervescent tablets comprise 0.5 to 5 weight percent of halosulfuronmethyl, 10 to 25 percent of pretilachlor and the balance of an assistant. The effervescent tablets can be prepared by a direct dry-process tabletting method or a method of wet-process granulating first and then tabletting; the direct dry-process tabletting method comprises mechanically grinding the assistant, uniformly mixing with the assistant and directly tabletting the two raw material medicines; and the method of wet-process granulating first and then tabletting comprises drying the two raw material medicines and the ground assistant, mixing, adhering, granulating to prepare an acid soft material and an alkaline soft material and tabletting. The prepared effervescent tablets are new herbicide preparation products which are environment-friendly and convenient to use. The herbicide effervescent tablets can effectively prevent and control various weeds such as weed from broad leave family, grass family, cyperaceae family and the like in rice shooting fields and transplanting fields.

Description

technical field [0001] The invention relates to a pesticide effervescent tablet and a preparation method thereof, in particular to a herbicide composition with chlorpyrazosulfuron-methyl and pretilachlor as active ingredients and a preparation method thereof, and the pesticide composition can be applied to clear rice fields A variety of broadleaf, grasses and sedges and other weeds. Background technique [0002] The cultivated area of ​​rice in my country is about 3 million hectares, ranking second in the world. The common weeds in the country include barnyard grass, cow hair grass, water sedge, special-shaped sedge, wild grass burial, eye spinach, bermudagrass, etc., rice fields The area of ​​weed damage level above medium (level 2-5) reaches 15.467 million hectares, of which the area of ​​serious damage (level 4-5) is 3.8 million hectares, accounting for 46.8% and 11.5% of the rice planting area respectively. The food loss caused by weed damage exceeds 20 billion kilograms....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N47/36A01N37/22A01N25/34A01P13/00
Inventor 方峰赖开平叶一强莫炳荣黄科林阮恒王俊
Owner GUANGXI RES INST OF CHEM IND CO LTD
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