2.5%咯菌腈悬浮种衣剂防治西兰花根腐病药效研究

目的]预防西兰花根腐病等土传病害的发生，提高种植经济效益。方法]进行2．5％咯茵腈悬浮种衣剂不同梯度防治西兰花根腐痛药效试验，以25g/L咯茵腈悬浮种衣剂作为对照。结果]2．5％咯茵腈悬浮种衣剂拌种对西兰花根腐病有一定的防治效果，其药效随用药剂量的加大而上升，其中2．5％咯菌腈悬浮种衣剂i750mg／kg的防效达60．40％，与对照药剂25g/L咯菌腈Fs3750mg／kg的防效相当，且对西兰花出苗、植株长势等无明显不良影响，安全性较好。结论]该种表剂可以在生产上加以推广应用。

Study on Effecte of Fludioxonil 25 g/ml FS Against Broccoli Root Rot

Objectve]The aim was to pre- vent broccoli root rot disease and im- prove economic effectiveness. Method] Disease controlling test was carried out by different concentration of 2.5% flu- dioxonil FS. Result] Field efficacy trials indicated that 2.5% fludioxonil FS had good effect on controlling broccoli root rot. Disease preventing efficiency growed with dose increase, with efficiencies up to 60.40%（ 1 750 mg/kg）, which had no significant differences with CK （fludioxonil 25 g/L FS, 3 750 mg/kg）. In addition, 2.5% fludioxonil FS showed excel- lent safety to seedings. Conclusion]A regional application could be developed.