330g/L二甲戊灵乳油对水稻旱育秧田杂草的防除效果

目的]全面了解330 g/L二甲戊灵的药效、杀草谱、用药量、安全性及配套应用技术。方法]以常规药剂19%丁·扑可湿性粉剂为对照药剂,研究330 g/L二甲戊灵乳油对水稻旱育秧田杂草的防除效果及对水稻秧苗生长的安全性。结果]330 g/L二甲戊灵乳油在水稻旱育秧田采用播后苗前使用,对秧田稗草、马唐、黎等一年生单、双子叶杂草具有理想的防除效果,表现杀草谱宽,对水稻出苗率、生长发育无不良影响,明显优于19%丁·扑可湿性粉剂。结论]330 g/L二甲戊灵乳油用于水稻旱育秧田防除稗草、藜、马唐等一年生单、双子叶杂草,推荐使用剂量(有效成分)为743~990 g/hm~2,即商品量2 250~3 000 mL/hm~2。

Efficacy Trials of 330 g/L Pendimethalin EC against Weeds in Dry Rice-nursery Field

Objective] The aim was to understand control effect,herbicide controlling spectrum,applying dosage,safety and complete set of application technology of 330 g/L pendimethalin EC.Method] Taking common agent 19% butachlor·prometryn wettable powder as control,we studied control effect of 330 g/L pendimethalin EC against weeds in dry rice-nursery field as well as the safety to rice growth.Result] Field trails showed that 330 g/L pendimethalin EC used after rice sowing before seeding in dry rice-nursery field had the ideal control effect to annual monocotyledonous/dicotyledonous weeds like Barnyard grass,large crabgrass and Portulaca oleracea L.etc..The effect of 330 g/L pendimethalin EC was superior to the conventional reagents 19% butachlor·prometryn wettable powder.The control performance was wide,and there was no adverse effects on rice seedling emergence,growth and development.Conclusion] When 330 g/L pendimethalin EC is used after rice sowing before seeding in dry rice-nursery field to control annual monocotyledonous/dicotyledonous weeds like Barnyard grass, large crabgrass and Portulaca oleracea L.etc.,the recommended applying dosage (effective component) is 743-990 g/hm2,that is amount of preparation 2 250-3 000 mL/hm2.