Prevention and treatment of annual weeds in rice transplanting field by mixing pyrazosulfuron-ethyl, simetryn and butachlor

Abstract

The invention relates to a weeding composition, wherein the active ingredients of the weeding composition comprise pyrazosulfuron-ethyl, simetryn and butachlor. The weeding composition is safe to riceand can effectively prevent and remove various gramineous and broadleaf weeds in a paddy field. The weight ratio of the active ingredients is (1-100) : (1-100) : (1-100), preferably (1-10) : (1-10) :(1-50), and more preferably (1-10) : (1-10) : (20-50). The weeding composition can be prepared into agriculturally allowable dosage forms such as missible oil, water dispersible granules, wettable powder, powder, granules, a suspending agent, a dispersible oil suspending agent and large granules according to a method known by technicians in the field. The preferable dosage form of the weeding composition is a dispersible oil suspending agent. The composition is used for preventing and removing gramineae, broadleaf and cyperaceae weeds in transplanted rice fields, direct seeding rice seedlingbeds and seedling throwing 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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