[目的]探讨60％氧氟·丁噻隆WG防除甘蔗田杂草的可行性.[方法]采用等效线法评价丁噻隆与乙氧氟草醚对马唐和反枝苋的联合作用.采用芽前封闭试验测定60％氧氟·丁噻隆WG对杂草防效及甘蔗安全性.[结果]丁噻隆与乙氧氟草醚按有效成分5:1比例混配,对马唐和反枝苋的协同增效作用明显.药后60 d,60％氧氟·丁噻隆WG(600～1 200 g a.i./hm2)对杂草防效大于82％,对甘蔗安全.[结论]60％氧氟·丁噻隆WG防除甘蔗田杂草具有防效好、杀草谱广、对甘蔗安全等特点.
Effects of Tebuthiuron · Oxyfluorfen 60％ WG on Controlling Weeds in Sugarcane Field
[Aims] The study aims to investigate the feasibility of tebuthiuron · oxyfluorfen 60％ WG to control weeds in sugarcane field.[Methods] The synergism oftebuthiuron and oxyfluorfen on Digitaria sanguinalis (L.) Scop.and Amaranthus retroflexus L.was evaluated by isoboles.The control effects and safety of soil-applied herbicide to sugarcane were studied.[Results] The results showed that significant synergism was observed in the mixture of tebuthiuron and oxyfluorfen on D.sanguinalis (L.) Scop.and A.retroflexus L.,with the proportion ration of 5:l showing the highest synergism.The results of field experiment showed that the control efficacy of tebuthiuron · oxyfluorfen 60％ WG in dose range of 600-1 200 g a.i./ha was more than 82％ after 60 d of spraying,and they were safety to sugarcane.[Conclusions] Tebuthiuron·oxyfluorfen 60％ WG has advantages of high efficacy,broad-spectrum and safety.
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