Prevention and control of annual weeds in rice transplanted fields by mixing pyrazosulfuron-methyl, simethoxam and butachlor

Abstract

The invention relates to a herbicidal composition, the active ingredients of which include pyrazosulfuron-methyl, sizazone and butachlor. The herbicidal composition is safe to rice and can effectively control various gramineous and broad-leaved weeds in rice fields. The weight ratio of the active ingredients is 1-100:1-100:1-100, preferably 1-10:1-10:1-50, more preferably 1-10:1-10:20-50. The herbicidal composition of the present invention can be formulated into the following dosage forms allowed in agriculture according to methods known to those skilled in the art, such as emulsifiable concentrate, water dispersible granule, wettable powder, powder, granule, suspension, dispersible oil suspension doses and large granules. The preferred dosage form of the herbicidal composition of the present invention is a dispersible oil suspension. The composition is used for controlling grass, broadleaf and sedge weeds in transplanted rice fields, direct-seeded rice seedling fields and throwing seedling rice fields.

Description

technical field [0001] The invention belongs to the field of pesticides, and in particular relates to a ternary herbicidal composition and its application. Background technique [0002] Rice field weed damage is one of the important factors affecting rice yield, and the application of herbicides, especially mixed herbicides, to control rice field weeds is an important technical measure. [0003] CN101444219A discloses that a compound preparation of pyrazosulfuron-methyl, protriazine and cintilazine has excellent control effects on paddy field barnyardgrass, bermudagrass, dwarf arrowhead mushrooms, knotweed and moshangcao. CN104430460A discloses an oil suspension of pyrazosulfuron-methyl, clomazone and butachlor for controlling barnyard grass, crabgrass crabgrass, bermudagrass and snakehead sausage in paddy fields, and the control effect is greater than 90%. CN107396928A discloses that the herbicide composition of butachlor, oxyflufen and sigran has a good control effect on ...

AI Technical Summary

Problems solved by technology

In addition, the long-term use of the same herbicide or the same compound formulation leads to the succession of weed communities in paddy fields, thereby inducing the occurrence of resistant weeds

[0004] In practical application, it is found that the existing herbicides such as the compound preparation of pyrazosulfuron-methyl, promethazone and siclofen, the compound preparation of bensulfuron-methyl, pyrazosulfuron-methyl and butachlor, and the compound preparation of butachlor and Although the mixed preparation of pyrazosulfuron-methyl can obtain a certain control effect, on the one hand, its use still has hidden damage to rice, and the application period is slightly different, which may cause obvious phytotoxicity; on the other hand, due to weed resistance The preventive effect of the existing compound preparations shows an obvious downward trend

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