三种酰胺类新农药对水稻孕穗期稻纵卷叶螟的防效试验

Control effect of three new amide pesticides on rice leaf rolder, Cnaphalocrocis medinalis, at the booting stage of rice

杨廉伟**,陈将赞,戴以太,丁灵伟,杨坚伟

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作者单位：浙江省天台县植保站 天台 317200

中文关键词：稻纵卷叶螟, 防治效果, 氯虫苯甲酰胺, 氟虫双酰胺, 氯虫·噻虫嗪

英文关键词： Cnaphalocrocis medinalis, control efficacy, chlorantraniliprole, flubendiamide, chlorantraniliprole thiamethoxam

中文摘要：

        单季杂交晚稻孕穗期稻纵卷叶螟Cnaphalocrocis medinalis Guenée发生不整齐，为害重，在主治药剂氟虫腈即将禁用之际，急需防治高龄幼虫的长效药剂，酰胺类农药是满足这一条件的新一代农药。3种酰胺类农药试验结果，在单季稻孕穗期防治稻纵卷叶螟，20%氟虫双酰胺（WDG）150 g/hm²处理速效性与持效性表现最好，药后3 d防效达90.3%，药后15 d防效高达96.2%；20%氯虫苯甲酰胺（SC）150 mL/hm²处理速效性略低于氟虫双酰胺，持效接近，药后3 d、15 d防效分别达75.2%、91.2%；40%氯虫·噻虫嗪（WDG）120 mL/hm²处理速效介于氟虫双酰胺和氯虫苯甲酰胺之间，持效略低于前二者，药后3 d、15 d防效分别为83.2%、88.3%。对照药剂5%氟虫腈（SC）750 mL/hm²和90%杀虫单3 000 g/hm²处理药后3 d、15 d的防效均低于上述3种酰胺类新药剂。保叶效果以氯虫苯甲酰胺、氟虫双酰胺处理最高，药后15 d保叶率分别为83.6%和85.0%，二者无显著差异，其次为氯虫·噻虫嗪处理为59.6%，3种酰胺类新药剂保叶效果均显著高于对照药剂氟虫腈和杀虫单。结果表明，3种酰胺类农药孕穗期防治稻纵卷叶螟的药效、持效性和保叶效果均高于当前主治药剂氟虫腈、杀虫单，可在生产上推广应用。

英文摘要：      Control effect of three new amide pesticides on rice leaf rolder, Cnaphalocrocis medinalis Guenée, at mid-and late-booting stage of rice in single rice-cropping season were tested in this research. The results indicated that 20% flubendiamide took effect quickly and durably with the best performance and its control efficacy was as high as 90.3% in 3 days and reached 96.2% in 15 days after sprayed with 150 g/hm². The efficacy of 20% chlorantraniliprole was 75.2% in 3 days and 91.2% in 15 days after sprayed with 150 mL/hm². The efficacy of 40% chlorantraniliprole thiamethoxam was 83.2% in 3 days and 88.3% in 15 days with 120 mL/hm². These three new amide pesticides gave better efficacy controlling leaf rolder than the other two pesticides: 5% fibroin (750 mL/hm²) and 90% Shachongdan (3 000 g/hm²). The best leaf protecting effect was obtained with 20% chlorantraniliprole (83.6%) and 20%flubendiamide (85.0%), while it was 59.6% for 40% chlorantraniliprole thiamethoxam. These three new amide pesticides provided significantly higher leaf protecting effect than the two controls in 15 days after sprayed.

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