A kind of herbicide composition and its application

Abstract

The invention discloses a herbicidal composition, comprising 1 part by weight of metolachlor, 0.01-50 parts by weight of oxyfluorfen and 0.001-15 parts by weight of flumioxazin. The invention also provides application of the above herbicidal composition in the prevention and control of weeds in crops. Through the above technical solution, the herbicidal composition of the present invention can achieve significant synergic control effect, thus improving the performance of the herbicide.

Description

technical field [0001] The present invention relates to the field of agriculture, in particular to a herbicide composition and the use of the herbicide composition. Background technique [0002] Rice is the grain crop with the largest planting area in my country, and the development of rice production is the key to ensuring food security in my country. [0003] Affected by climate, environment and diverse cultivation methods in various places, weeds in paddy fields are relatively complex, and weeds are seriously harmful and difficult to control. In recent years, the types of weeds in paddy fields have been on the rise. Because they compete with crops for fertilizer, water, sunlight, and space, they have a serious impact on rice yield and quality. Therefore, they have become an urgent problem in paddy field production. [0004] According to the grass phase in rice fields, the types of weeds in rice fields in my country can be roughly divided into: mainly gramineous weeds, ma...

AI Technical Summary

Problems solved by technology

[0005] At present, the main herbicides for controlling weeds in paddy fields are: bensulfuron-methyl, quinclorac, butachlor, acetochlor, pretilachlor, bentazone, propanil, etc., but due to the mechanism of action, chemical structure Due to differences in physical and chemical properties and application performance, different herbicides have limited herbicidal ability and narrow herbicidal spectrum. For example, bensulfuron-methyl has poor effect on gramineous weeds. Broad-leaved weeds and sedges can have poor effects on weeds with more than 3 leaves; quinclorac has poor effects on broad-leaved weeds and Cyperaceae, and the residual amount in the soil is large, which is easy to cause phytotoxicity to subsequent stubble; Ammonium is a pre-emergence herbicide, which has poor effect on barnyardgrass above the three-leaf stage. When the water layer submerges the heart leaves during application, the butachlor liquid will affect the growing point of rice, which is prone to phytotoxicity symptoms and is toxic to fish. Stronger, the field water after treatment in rice fields cannot be discharged into fish ponds; acetochlor herbicide has poor effect on gramineous weeds, and acetochlor metabolites in surface water are harmful to human body; pre-emergent herbicide , When applied alone, the selectivity to wet-inserted rice is poor, and the rice is also sensitive to pretilachlor in the germination stage; bentazone is ineffective against grass weeds, and the effect is not good when the pesticide is applied on cloudy days or when the temperature is low , has irritating effect on human eyes and respiratory tract; propanil is a highly selective contact herbicide of amides, but it is easy to decompose in the soil and cannot be used as a soil treatment agent, and the temperature is higher than 30 °C, and the water layer submerges the seedlings. easy to produce injury

[0006] Due to the occurrence of a large number of resistant weeds in rice fields, the current herbicides have the disadvantage of low control efficiency in controlling resistant weeds in rice fields

Images