水田稗草对二氯喹磷酸己产生明显抗药性。自笔者1993年初开始从事水稻直播田化学除草剂推广应用工作以来,洞庭湖区的直播稻田绝大部分是使用50%二氯喹磷酸WP防除稗草,推广之初,亩施用量为30克,除稗效果可达95%以上。随着使 Echinochloa crus-galli had obvious resistance to dichloroquine phosphate. Since the beginning of 1993, when I started to work on the promotion and application of chemical herbicide in the field of direct seeding rice, most direct-seeding rice fields in Dongting Lake area were treated with 50% dichloropalone WP to control barnyardgrass. At the beginning of popularization, The effect of up to 95%. With that