Assessment on the safety of 60% hexazinonediuron WP to the sugarcane field.

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./hm2 and 2700 g a.i./hm2.