Herbicide effervescent tablets and preparation method thereof

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....

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