探明81％氯吡嘧·硝磺草·莠灭净可湿性粉剂对甘蔗安全性、杂草防除效果及最佳用量,筛选出适宜的甘蔗地除草剂及其用药量.选用三元复合除草剂81％氯吡嘧·硝磺草·莠灭净可湿性粉剂为试验药剂,75％氯吡嘧磺隆水分散粒剂、25％硝磺草酮悬浮剂、80％莠灭净水分散粒剂3种单剂作对照药剂,以及设人工除草、清水对照处理,开展甘蔗地除草试验.81％氯吡嘧·硝磺草·莠灭净可湿性粉剂911.25～1 822.5 g a.i./hm2用量防除效果最为突出,在药后45 d,杂草总株防效可达94.26％～97.55％,鲜重防效可达96.16％～98.66％,显著高于其余处理.81％氯吡嘧·硝磺草·莠灭净可湿性粉剂能有效防控甘蔗地一年生杂草,且对甘蔗整个生育期安全,从农药减量角度出发,在实际生产中推荐田间制剂用量为911.25～1 215 g a.i./hm2.
Effects of 81％Halosulfuron-methyl,Mesotrione,and Ametryn WPs on Controlling Weeds in Sugarcane Fields
To investigate the safety,weed control effect,and optimal dosage of 81％halosulfuron-methyl,mesotrione,and ametryn WPs,suitable sugarcane herbicides and their dosages were screened.Three compound herbicides,81％halosulfu-ron-methyl,mesotrione,and ametryn WP powder,were selected as test agents,75％halosulfuron-methyl WG,25％mesotrione SC,and 80％atrazine WG were used as control agents,and artificial weeding and water control treatments were used to carry out sugarcane field weeding tests.Eighty-one percent halosulfuron-methyl,mesotrione,and ametryn WP at 911.25-1 822.5 g a.i.·hm-2 had the most outstanding control effect.The control effects on total plant and fresh weight reached 94.26％-97.55％and 96.16％-98.66％,respectively,which were significantly higher than other treatments at 45 d after treatment.Eighty-one percent halosulfuron-methyl,mesotrione,and ametryn WP can effectively control annual weeds in sugarcane fields and is safe for the whole growth period of sugarcane.From the perspective of pesticide reduction,the recommended dosage of field preparation is 911.25-1 215 g a.i.·hm-2 in actual production.
halosulfuron-methyl,mesotrione and ametryn WPsHalosulfuron-methylmesotrioneAmetrynsugarcaneweedscontrol efficiency
万方数据
维普
