中文摘要：

采用喷壶对田间油菜进行模拟降雨，测定咪鲜胺的耐雨水冲刷力及有机硅助剂对咪鲜胺防治油菜菌核病的影响。结果表明，模拟降雨（喷水）显著降低咪鲜胺对核盘茵的抑制作用，但添加有机硅可有效防止喷水处理对咪鲜胺防效的降低作用，提高咪鲜胺的耐水冲刷力，同时还将咪鲜胺防治核盘菌的持效期从12d延长到14d。在田间条件下，以中双9号和中双10号为材料，咪鲜胺和含有机硅的咪鲜胺对油菜菌核病的平均病情指数防效分别为74．0％和80．0％，在2个油菜品种上有机硅对咪鲜胺防治油菜茵核病均有一定的增效作用。油菜喷施咪鲜胺、有机硅和含有机硅的咪鲜胺后，株高、单株有效角果数、每角粒数和千粒重等产量因子与清水喷雾过的油菜之间没有显著差异，表明咪鲜胺和有机硅对油菜生长发育没有抑制作用。

英文摘要：

The water - tolerance of Prochloraz and the influence of organic silicone adjuvant on the control of sclerotinia disease in oilseed rape （Brassica napus） by Prochloraz were measured by using a watering can to form simulated rainfall in the field of oil- seed rape. The results showed that the control effect of Proehloraz against Sclerotinia sclerotiorum was significantly reduced by the simulated rainfall （water spray）. However, the addition of organic silicone could effectively prevent this reduction in the control effect of Prochloraz, enhance the water - tolerance of Prochloraz, and also prolong the period of validity of Prochloraz against S. scle- rotiorum from 12 days to 14 days. Field tests were conducted on oilseed rape cuhivars Zhongshuang No. 9 and Zhongshuang No. 10, and the average control effect of Prochloraz and Prochloraz plus organic silicone against Sclerotinia sclerotiorum was 74.0% and 80.0% respectively, suggesting that the addition of organic silicone had a certain synergism on the control of Sclerotinia sclerotiorum in both cultivars by Prochloraz. Furthermore, the plant height, effective pod number per plant, seed number per pod and 1000 - seed weight were not significantly different among the treatments of Prochloraz, organic silicone, Prochloraz added with organic sili- cone, and water, indicating that Procholraz and organic silicone had no inhibition to the growth and development of oilseed rape.