摘要
The study aim was to explore the optimal dose and application time of pinoxaden in the control of Phalaris arundinacea in barley field. In the plot experi- ments, four doses （from 900 to 2 400 ml/hm^2） of pinoxaden （50 g/L） EC was ap- plied for the control of P. arundinacea in barley field. The optimal application time of pinoxaden was 3-4 leaf stage of P. arundinacea and 4-5 leaf stage of barley. In this stage of P. arundinacea, the efficacy of four doses was all more than 97%. The 50 g/l pinoxaden exhibited excellent efficacy to P. arundinacea, and the efficacy was better than that of the 69 g/L fenoxaprop-p-ethyl and manual weeding. In 4-5 leaf stage of barley and 3-4 leaf stage of P. arundinacea, when the pinoxaden was applied at the dose from 900 to 1 200 ml/hm^2, the efficacy for controlling P. arundi- nacea could be more than 97%. There was no harmful effect to other arthropods in field, and it was safe to barley. ds
为了探索50g/l唑啉草酯防除冬大麦田虉草最佳用量和时期，采用50g/l啉草酯EC（爱秀）900—2400ml／hm^24个用量进行小区试验。防除冬大麦田虉草。结果表明最佳施药时间为虉草3-4叶期．大麦4～5叶期，此时施药防除效果最好．4个用量防效均达到97％以上。50g/L唑啉草酯EC（爱秀）对麦田虉草具有较好的防治效果,显著优于对照药剂69g／L精噁噶唑禾草灵EW（大彪马）及人工除草。在大麦4～5叶期，虉草3-4叶期时施药．当用量达到900～1200ml／hm^2，防效可达到97％以上。50g/L唑啉草酯EC（爱秀）用于冬大麦田虉草防除没有观察到对田间节肢动物的不良影响，对大麦安全，没有产生药害。
