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【目的】测定73%2甲4氯钠·莠灭净·敌草隆WP对甘蔗田杂草的防除效果,确定其最佳用药量。【方法】设73%2甲4氯钠·莠灭净·敌草隆WP876、1314、1752、2628a.i.g/ha和56%2甲4氯钠SP840a.i.g/ha、80%莠灭净WP1440a.i.g/ha、80%敌草隆WP1440a.i.g/ha,以及清水对照,药后20、40d调查药剂对杂草的防效。【结果】药后20、40d,73%2甲4氯钠·莠灭净·敌草隆WP对杂草的总体株防效、鲜重防效均超过90.00%,在876～2628a.i.g/ha剂量下均可有效防除大多数蔗田单、双子叶杂草,防效优于56%2甲4氯钠SP、80%莠灭净WP和80%敌草隆WP单剂。【结论】73%2甲4氯钠·莠灭净·敌草隆WP可有效防除大多数蔗田杂草,且对甘蔗安全,推荐用量为1314～1752a.i.g/ha。
【Objective】 The objective of this study was to determine the best dosage of 73% 2 A 4 chloro-sodium, ametryn and diuron WP in weed control. 【Method】 73% of 2 A 4 chloro-sodium / ametryn diuron WP876, 1314,1752,2628a.ig / ha and 56% of 2 sodium chloride 4 SP840a.ig / ha, 80% amebic WP1440a .ig / ha, 80% diuron WP1440a.ig / ha, and water control, 20,40 d after drug investigation on the weed control effect. 【Result】 The results showed that the control efficacy of 73% 2-methyl-4-chloro-5-ametrine diuron WP on weeds was over 90.00% at 20 and 40 days after treatment, ha dose can effectively control most of the monocotyledonous and dicotyledonous weeds in cane fields, and the control effect is better than that of 56% sodium 2-chloro-4-methyl-SP, 80% amethic WP and 80% diuron WP. 【Conclusion】 73% 2 A sodium chloride, ametryn and diuron WP can effectively control weeds in most sugarcane fields, and the safety of sugar cane is 1314 ~ 1752a.i.g / ha.