两种氟虫双酰胺复配制剂拌种对直播晚稻蓟马的控制效果及水稻生长的影响

为筛选直播晚稻蓟马的防治药剂，采用拌种法在大田试验了两种氟虫双酰胺复配制剂对直播水稻蓟马的控制效果，并考查了其对二化螟、稻纵卷叶螟的兼治效应及对水稻生长的影响。结果表明，48%氟虫双酰胺?噻虫啉SC 4~8 g a.i./kg种子处理拌种，可有效控制水稻苗期稻蓟马危害，药后14天杀虫和保叶效果分别为88.89%~95.03%和85.63%~91.67%，药后21天分别为87.64%~94.49%和78.86%~89.69%；2 g a.i./kg种子处理防效明显下降。同时，对二化螟具有兼治效果，并可刺激稻苗生长，提高水稻生长后期结实率和产量，而对稻纵卷叶螟防效较低。10%氟虫双酰胺?阿维菌素SC 1.5~3 g a.i./kg种子拌种对二化螟具有较好的控制效果，对稻蓟马和稻纵卷叶螟防效较低。因此，48%氟虫双酰胺?噻虫啉SC 4~8 g a.i./kg种子处理拌种可推荐用于水稻苗期稻蓟马和二化螟防治，而10%氟虫双酰胺?阿维菌素SC拌种处理不宜用于水稻苗期稻蓟马治理。

Efficacy of Two Flubendiamide Ready-Mixture Insecticides on Stenchaetothrips biformis and the Growth of Direct-Seeding Rice by Seed Dressing

The efficacy of 2 kinds of flubendiamide ready-mixture insecticides on S.biformis by seed dressing were studied in the paddy field for screening insecticides on S.biformis in direct-seeding late rice,their influence on Chilo suppressalis and Cnappalocrocis medinalis occurrence and the growth of direct-seeding rice were examined.The results showed that the efficacy of protective rice seedling and killing larva of flubendiamide-thiacloprid 48% SC at 4-8 g/kg on S.biformis were 88.89%-95.03% and 85.63%-91.67% ...