多种农药防治稻纵卷叶螟试验效果初报

An experiment summary of several pesticides to control rice leaf-folder

6种农药7个处理防治稻纵卷叶螟对比试验表明：667m^2用锐劲特20ml与敌百虫l00ml混配、三拂50ml在卵孵化高峰期和三龄高峰期施用，药后8天防治效果达92．6～98．1％，乐斯本在低龄期施药药后3天的防效可达96．4％，速效性好，但持效短；当稻纵卷叶螟大发生，发生盛期超过7天的，建议防治二次，应在孵化始盛期和l～2龄幼螟高峰期各施药一次。

An experiment of six pesticides with seven treatments to control rice leaf-folder was con- ducted and the results show that the application of 20 ml Ruijingte with 100 ml dipterex mix per 667m^2 and 50 ml Sanfu per 667m^2 during egg hatch peak stage and three ages peak stage, the control effect can reach 92.6-98.1% after eight days, the application of Lesiben can reach 96.4 % during youth stage after three days with a fast but short effect. When the rice leaf-folder＇s harm is serious and the peak stage is over seven days, it is suggested that two pesticide applications will be done at earlier hatch stage and 1-2 age larva peak stage.