60%环·敌可湿性粉剂在甘蔗田使用的安全性评价

Assessment on the safety of 60 % hexazinone-diuron WP to the sugarcane field

对60%环.敌可湿性粉剂不同剂量、不同施药时期、不同施药方式进行对比试验,探讨该除草剂在甘蔗田使用的安全性。结果表明,从施药时期看,以甘蔗生长2~4叶期施药比芽前施药或6~8叶期施药较安全;从施药方式看,以相对定向喷雾比直接封顶喷雾安全;从剂量看,以900 g a.i./hm^2造成的药害轻且容易恢复,而2700 g a.i./hm^2不仅药害重且不易恢复,1800 g a.i./hm^2则介于上述两者之间。

Some comparative experiments were designed to assess the safety of the mixture 60 % hexazinone-diuron WP to sugarcane under different stages,types and dosage of application.The results showed that when the mixture was applied in the 2-4 leaves stage of sugarcane,it could provide higher safety to the crop than that in the pre-emergence stage or in 6-8 leaves stage and directed spraying could decrease injury of the herbicide to the crop compared with cover spraying.When the herbicide was applied at the dosage of 900 g a.i./hm2,it caused only a little injury even non-injure to sugarcane,while a considerable injury could be seen at 1800 g a.i./hm^2 and 2700 g a.i./hm^2.