几种药剂防治稻纵卷叶螟田间药效试验比较

The research on different varieties pesticides application in field trials for rice leaf roller controlling

采用3.5%甲氨基阿维菌素苯甲酸盐.氟铃脲EC、5%阿维菌素EC+5%氟铃脲EC、20亿PIB/ml白僵菌.棉铃虫核型多角病毒体SC、1.8%阿维菌素EC、20亿PIB/ml棉铃虫核型多角病毒体SC五种农药,在早稻第二代稻纵卷叶螟发生期进行田间大区示范。试验结果表明:1.8%阿维菌素EC在防治适期施药后7d、15d的防治效果都在90%以上,具有一定的持效性和速杀性,性价高,但对水稻钻蛀性螟虫的兼治作用较差,可在稻纵卷叶螟和钻蛀性螟虫轻发年份大面积推广应用;5%阿维菌素EC+5%氟铃脲EC在防治适期施药后7d、15d的防治效果都在95%以上,速效性最快,持效性最长,性价比中等,同时对水稻钻蛀性螟虫的兼治作用很好,可在水稻生产上大面积推广使用,特别在稻纵卷叶螟或钻蛀性螟虫重发年份使用更佳。

Applying five kinds of pesticides, including 3.5% emamectin benzoate ＆ hexaflumuron EC, 5% abamectinEC＆5% hexaflumuron EC, 20 million PIB/ml beauveria bassiana＆HaSNPV polyhedrosis virus SC, 1.8% abamectin EC, 20 million PIB/ml helicoverpa armigera nuclear polyhedrosis virus body SC, demonstrate in field area for rice Cnaphalocrocis leaf roller controlling of the second generation of early rice during emergence period. The results show that, the controlling effect rate is above 90% by applying 1.8% abamectin EC after 7d and 15d of optimum period for controlling, with certain advantages of persistence, speed killing and high cost performance, but poor effect for treatment of rice drill decay borers, which can be applied in large area for rice leaf roller and light condition of rice drill decay controlling. The controlling effect rate is above 95% by applying 5% abamectin EC ＆5% Fluoride bell urea EC after 7d and 15d of optimum period for controlling, with best advantages of readily availability, persistence, and miterm cost performance, and good effect for treatment of rice drill decay borers, which can be applied in large area, especially for serious condition of rice leaf roller and rice drill decay controlling.