Mixed herbicide

Abstract

The invention provides a mixed herbicide, comprising the effective components of bensulfuron, clomazone, pretilachlor with a weight ratio of 1-2:0.5-16:0.5-30. The mixed herbicide has safener fenclorim (CGA123407) with the weight ratio of pretilachlor: safener = 2-4:1. The mixed herbicide also has pesticide science acceptable accessory material such as dispersant, humectant, surfactant and carrier. The dosage form of the mixed herbicide is pesticide science acceptable form such as wettable powder, missible oil, water-dispersing granules preparation, suspending agent, micro emulsion aqua. The mixed herbicide has a good effect to the graminaceous weed, broad-leaf weed and sedge.

Description

Technical field: [0001] The invention relates to a chemical pesticide, in particular to a compound herbicide for paddy fields. Background technique: [0002] The chemical name of bensulfuron methyl is: α-{[(4,6-dimethoxypyrimidin-2-yl)aminohydroxylamino]sulfonylmethyl}benzoic acid methyl ester, and its molecular formula is: ester for C 16 h 18 N 4 o 7 S, acid is C 15 h 16 N 4 o 7 The structural formula of S is: [0003] [0004] Bensulfuron-methyl is a selective systemic herbicide, which can be absorbed by the roots and leaves of weeds, and quickly transferred to the whole plant of weeds, which can hinder the biosynthesis of amino acids in weeds, thereby preventing the growth of cells. It can split and grow, but it is very safe for rice, and it is suitable for weeding in different soil types and various types of rice fields. Pre-emergence or early post-emergence treatment has a good control effect on annual and perennial broad-leaved weeds and sedge weeds, such ...

AI Technical Summary

Problems solved by technology

[0012] To sum up, the problem existing in the current use of pretilachlor (including promethazine) and bensulfuron-methyl is that the herbicidal spectrum is not wide enough, and each herbicide used alone cannot effectively kill some weeds, while " Although the herbicides of the C-benzyl group have certain complementarities and have expanded the herbicidal spectrum, as the planting structure changes, the weeds in the paddy field have changed. The occurrence of Polygonum chinensis, Polygonum willow-leaf, and Polygonum pennensis) has increased year by year, and has developed into new malignant weeds, which are difficult to be effectively controlled by general herbicides

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