A method of preventing and controlling weeds in paddy fields

Abstract

According to the characteristics of different farmland systems, the present invention provides different methods for preventing and controlling weeds in paddy fields. By controlling weeds in the early stage of rice field growth within 1 month after rice sowing, weeds can be controlled at the germination stage by using herbicides with multiple action sites and using their pre-emergence sealing function, or after the weeds emerge During the 1-2 leaf stage, which is the most sensitive period to herbicides, it is controlled to minimize the competition between weeds and rice in fertilizer, water, light and other resources in the early growth stage of rice, and promote the robust growth of rice. By adopting the method of the invention, the control effect of the main weeds in the paddy field can reach more than 95%, and it can also slow down the generation of weed resistance and reduce the dosage of herbicides, which is suitable for the control of weeds in paddy fields in my country.

Description

technical field [0001] The invention belongs to the technical field of plant protection, in particular to a method for preventing and controlling weeds in paddy fields. Background technique [0002] Chemical weeding plays a pivotal role in rice production due to its unique advantages of high efficiency, rapidity and economy. Its promotion and application have greatly liberated productivity and greatly increased labor productivity. It has become an indispensable advanced technology for the realization of agricultural mechanization and modernization, and it is also an important guarantee for high and stable rice yields. At present, more than 100 million hectares of herbicides have been used in my country, accounting for 60% of the total area. Chemical weeding has become the most important measure to prevent and control weeds in paddy fields. With the continuous deepening of agricultural modernization, this trend will accelerate. However, due to the high technicality of herbi...

AI Technical Summary

Problems solved by technology

However, due to the high technicality of herbicide application in production practice, if it is used improperly, such as inaccurate application time, unreasonable selection of herbicide varieties, and incorrect application methods, etc., the herbicide will fail and lead to rice yield reduction It will also cause farmers to arbitrarily increase the dosage of herbicides, resulting in increased costs and weed resistance. At the same time, it will also bring a series of problems such as environmental pollution crisis, herbicide damage and food safety; direct threat It also threatens the continued use of herbicides and the safety of agricultural production