Compound herbicide

Abstract

The present invention provides a compound herbicide for preventing and killing barnyard grass, broad-leaved weed and nutgrass flatsedge in rice field. Its effective components include isoprotuion5-60wt%, bensulfuron-methyl 1-15 wt% and pendimethalin 2-30 wt% and it also contains some additives as assistant and stuffing. The application range includes rice seedling bed and rice field.

Description

technical field [0001] The invention relates to a compound herbicide capable of controlling weeds such as barnyardgrass, broadleaf grass and sedge in paddy fields. Background technique [0002] Rice is the food crop with the widest planting range and the largest planting area in my country. Therefore, weed control in rice fields has always been a major research topic. At present, the main single agents of herbicides widely used in paddy fields are: bensulfuron-methyl, pyrazosulfuron-methyl, quinclorac, butachlor, grass-carb, etc.; compound agents: bensulfuron-methyl or pyrazosulfuron-methyl Compound herbicides mixed with single agents such as acetochlor, metolachlor, butachlor, pretilachlor, quinclorac, and mefenamide. In recent years, due to the diversity of rice seedling raising and cultivation methods in my country, there are more and more types of weeds in rice fields. The existing single-dose and compound herbicides have poor safety, or the weeding effect is not high, ...

AI Technical Summary

Problems solved by technology

In recent years, due to the diversity of rice seedling raising and cultivation methods in my country, there are more and more types of weeds in rice fields. The existing single-dose and compound herbicides have poor safety, or the weeding effect is not high, or the use cost is high. or disadvantages such as a narrow range of use

For example, compound herbicides containing acetochlor and metsulfuron-methyl can only be used in large seedling transplanting fields, not in small seedling throwing fields. Even if used in rice transplanting fields, it is easy to cause phytotoxicity to rice seedlings when encountering high temperatures ; Herbicides containing butachlor are used in water seedling fields and water direct-seeding fields. The seedling fields are required to be flat and free of water, otherwise it will affect the emergence of rice seeds; metolachlor and its compound herbicides can only be used in dry seedling fields , cannot be used in water seedling fields

With the large-scale promotion of direct seeding of rice, there are fewer types of herbicides suitable for this planting method, and there is a contradiction between herbicidal effect and safety; and the control effect on weeds are all very good, but the cost of use is higher, which is unacceptable to people; the use of each herbicide single agent then has the deficiency of narrow herbicidal spectrum