Compound herbicide

Abstract

The invention discloses a composite herbicide formulated by 0.5-1.5 portion of pyrazosulfuron-ethyl, an active component, and 7.5-8.5 portion of prometryne according to weight account, which can effectively control weed such as Chinese water chestnut and pondweed, with a herbicidal rate of above 80 per cent. Through measurement of indoor biology, co-toxicity coefficient of the herbicide of the invention is bigger than 100; two single-doses has synergistic interaction effect; dosage for single using the pyrazosulfuron-ethyl is decreased and drug cost is reduce. By field plot experiment, the herbicide of the invention has a stable weeding effect and is safe for growth of rice.

Description

technical field [0001] The invention relates to a herbicide, in particular to a herbicide compounded by pyrazosulfuron-methyl and promethazin. Background technique [0002] Pyrazosulfuron-methyl is a highly active systemic selective herbicide of the sulfonylurea class, which is mainly absorbed by the roots of plants and rapidly conducts in plants, inhibits the biosynthesis of amino acids in plants, and stops the growth of weed shoots and roots quickly It grows, and then the whole plant dies. It is mainly used for controlling barnyardgrass, sedge weeds and broad-leaved weeds in rice fields, transplanting fields, and throwing seedling fields. Promethazine is a systemic selective herbicide, which can be absorbed and transmitted through roots and leaves. It has the best control effect on newly germinated weeds and has a wide herbicidal spectrum. It can control annual grass weeds and broad-leaved weeds . [0003] In recent years, due to the change of weed populations in paddy f...

AI Technical Summary

Problems solved by technology

Both pyrazosulfuron-methyl and prometon are systemic selective herbicides, and there is no related report on the compound preparation of pyrazosulfuron-methyl and prometon

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