稗草隶属于禾本科,稗属(Echinochloa),是世界上重点研究防除的一类恶性杂草。稗草原产欧洲和印度,分布于世界61个国家,我国各地均有分布。在松辽平原,水田稗草以杂草群落优势种或亚优势种群的竞争势大量夺取稻田中的环境资源,使水稻的生长发育受到抑制而导致减产。 Echinochloa belongs to the genus Echinochloa, which is one of the most serious malignant weeds in the world. Barnyard grass originating in Europe and India, distributed in 61 countries in the world, all over our country are distributed. In the Songliao Plain and paddy field, barnyard grass seized a large amount of environmental resources in the paddy fields by competitive advantage of the dominant or subdominant populations of weed communities, resulting in the suppression of growth and development of rice and the decrease of yield.