最近在句容不少农户来电反映年后用异丙隆250克/亩,效果不理想,出现杂草不死现象,苏中地区农户反映麦苗出现药害现象,为此笔者咨询了江苏省农科院和植保部门专家,专家一致认为,出现此现象,究其原因,杂草抗性致使防效下降,产生冻害 Recently, many farmers in Jurong call reflect the year after isoproturon 250 g / acre, the effect is not satisfactory, the phenomenon of weeds do not die, farmers in the Soviet Union reflect the phenomenon of wheat seedlings injury, for which I consulted the Jiangsu Provincial Agricultural Science Hospital and plant protection experts and experts agree that this phenomenon occurs, the reason, weed resistance led to decline in control efficiency, resulting in frost damage