15%氟啶胺包衣悬浮剂防治油菜根肿病研究

Clubroot( Plasmodiophora brassicae) control by seed coating with 15% Fluazinam suspension concentrate in oilseed rape

为防治油菜重要病害根肿病,研制15%氟啶胺包衣悬浮剂,以甘蓝型油菜品种中双9号为材料的试验结果表明：按包衣比[包衣剂质量（g）∶种子质量（g）]≥1∶50包衣油菜种子,15%氟啶胺包衣剂对种子发芽率、成苗率及油菜苗高、根长和鲜重没有显著影响。用包衣比1∶200、1∶100、1∶50和1∶25包衣的种子,盆栽试验中根肿病的防治效果为43.7%、46.4%、83.5%和92.5%;田间小区试验防治效果分别为22.2%、53.6%、44.5%和54.5%。初步结果说明,可用15%氟啶胺的包衣悬浮剂按包衣比1∶100-1∶50处理种子防治油菜根肿病。

Rapeseed clubroot disease caused （Brassica napus L. ） production areas in China in by Plasmodiophora brassicae is a serious disease in oilseed rape recent years. In this study, susceptive cuhivar Zhongshuang 9 was used to test the protective effect of 15% Fluazinam suspension. Results showed that this agent had no effect on seed germination, nor on seedling development, seedling height, root height and seedling fresh weight when the seeds treated with coating rate （suspension weight： seeds weight） over 1： 50, compared with those from non -treated seeds. Control efficiency to rapeseed clubroot were 43.7%, 46.4%, 83.5%, 92.5% in pot experiment, and were 22.2%, 53.6%, 44.5%, 54.5% in field experiment when using 15% Fluazinam suspension concentrate with seed coating ratio as 1： 200, 1： 100, 1：50 and 1：25 respectively. Thus the agent of 1：100 and 1：50 could be applied for clubroot management in oilseed rape production areas.