40%仲威·毒死蜱乳油防治稻纵卷叶螟田间药效试验

以水稻品种宁粳3号和镇稻11号为试材,进行了40%仲威·毒死蜱乳油、30%唑磷·毒死蜱乳油、36%敌百·三唑磷乳油和40%丙溴·毒死蜱乳油田间防治稻纵卷叶螟的比较试验。结果表明：40%仲威·毒死蜱乳油对稻纵卷叶螟防治效果较好。同时进行了不同使用剂量的40%仲威·毒死蜱乳油防治效果试验。结果表明：在卵孵高峰期施药,40%仲威·毒死蜱乳油1 800 mL/hm2处理的杀虫效果较好,防效达95.9%,保叶效果为92.4%,与对照药剂20%氯虫苯甲酰胺悬浮剂150 mL/hm2以及50%稻丰散1 800 mL/hm2和2 250 mL/hm2的防治效果相当。40%仲威·毒死蜱乳油对稻纵卷叶螟具有较好的防治效果,对水稻安全,是防治稻纵卷叶螟的理想药剂。

Field Efficacy Experiment of 40% Fenobucarb + Chlorpyrifos EC on Cnaphalocrocis medinalis

Using rice varieties Ningjing No.3 and Zhendao No.11 as the materials,the field efficacies of 40% fenobucarb＋chlorpyrifos EC,30% triazophos ＋ chlorpyrifos EC,36% dipterex＋triazophos EC,40% profenofos ＋ chlorpyrifos EC on Cnaphalocrocis medinalis were compared.The results showed that the control efficacy of 40% fenobucarb＋chlorpyrifos EC was better.When it was used with the dose of 1 800 ml/hm2 at the egg hatching peak,the control efficacy and the leave protecting effect was 95.9% and 92.4%,respectively,which was at the same level comparing with that of 150 mL/hm2 of 20% chlorantraniliprole SC,and that of 1 800 mL/hm2 and 2 250 mL/hm2 of 50% phenthoate.