Method for preventing and controlling rice field weeds

Abstract

The invention provides different methods for preventing and controlling rice field weeds according to the characteristics of different farmland systems. By preventing and controlling rice field weedsat an early growth and development stage within 1 month after rice planting, the weeds are controlled to a germination stage by using herbicides having multiple acting points and utilizing their functions of pre-emergence closing or are controlled within 1-2 leaf stages after weed germination, namely the most sensitive stage of the herbicides, the competition between the weeds and rice for fertilizers, water, light and other resources is decreased to the most degree at the early growth and development stage of rice, and healthy and strong growth of the rice is promoted. By adopting the method,the effect of preventing and controlling main rice field weeds can reach 95% or above, the pesticide resistance of weeds can also be retarded, the use amount of herbicides can also be decreased, andthe method is suitable for prevention and control of domestic rice field weeds.

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