稗草是我县稻田的主要杂草,任其滋生能严重影响水稻产量。1981年我们曾对本所附近社队的稻田稗草生育和为害情况作了较系统的调查,目的在于通过了解稗草生育特点,为选择适当的除稗方法和有利的除稗时机提供依据。根据调查,我所附近社队稻田稗草主要有稗[Echinochloa crusgalli(L.) Echinochloa crusgalli is the main weed in paddy fields in our county, letting its breeding can seriously affect the yield of rice. In 1981, we conducted a systematic investigation on the growth and damage of barnyardgrass in the rice fields of communes and communes near our site. The purpose is to understand the breeding characteristics of barnyard grass and provide the basis for choosing the appropriate method of removing barnyard grass and the favorable opportunity of removing barnyard grass. According to the survey, there are mainly barnyardgrass in the communes and rice fields in our community [Echinochloa crusgalli (L.)