【摘要】 [目的]为了更好地为防治水稻三化螟的危害提供指导。[方法]在水稻破口期,以不同用药量和用药次数的6种市售药剂进行防治3代三化螟的药效比较试验。[结果]一次用药效果较差,以破口期两次用药,防效最好。第一次用50%赛利EC 100 ml,第二次20%强杀螟EC 80 ml组合防治效果最好,白穗率为0.87%,相对防效为96.51%;第一次20%三唑磷EC 150 ml,第二次20%强杀螟EC 80 ml白穗率为0.94%,相对防效为96.24%。[结论]50%赛利、20%三唑磷、20%强杀螟是防治三化螟的高效药剂,杀虫双不能作为防治三化螟的主体药剂。以破口期为标准来指导防治较为恰当,只有破口期两次用药,才能达到控制3代三化螟的目的。更多还原

【Abstract】 [Objective] The aim was to supply guidance for controlling the harm of paddy borer.[Method] In the rice breach period,the effect comparison experiment of 6 market pesticides with different dosages and using frequency on controlling paddy borer of the third generation was conducted.[Result] The effect of using pesticides once was worse and the effect of using twice in the rice breach period was best.The effect of using 50% Saily EC 100 ml at the first time and secondly using 20% Qiangshaming EC 80 ml was best,with the rate of none-seed being 0.87% and the relative control effect being 96.51%.The relative control effect of using 20% Triazophos EC 150 ml at the first time and secondly using 20% Qiangshaming EC 80 ml was 96.24% and with the rate of none-seed being 0.94%.[Conclusion] 50% Saily,20% Triazophos and 20% Qiangshaming were the highly efficient pesticides for controlling paddy borer and Shachongshuang couldn’t be used as the main pesticides for controlling paddy borer.It was proper to use breach period as standard to guide control.The purpose of controlling paddy borer of the third generation was only achieved by using twice in the breach period.更多还原