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自 1 98 7年以来 ,江苏省溧阳市油菜田杂草防除一直使用盖草能和喹禾灵等茎叶处理剂 ,导致药剂用量逐年上升 ,而防效却不断下降。早在 1 995年 ,我们就发现油菜田使用盖草能后田间还有许多残留杂草 ,1 998年后此类问题更为突出 ,尤其是喹禾灵类药剂 ,即使加倍使用也无法控制杂?
Since 1978, the weed control in rapeseed field in Liyang City, Jiangsu Province has been using stem and leaf treatment agents such as cloverleaf and quizalofop-p-ethyl, resulting in the increase of the dosage of medicaments year by year and the decrease of the control efficiency. As early as 1995, we found that there were many residual weeds in the field after the cover grass was used in rape fields. Such problems became even more pronounced after 1998. Quizalofop agents, in particular, can not be controlled even after double application ?