大白菜霜霉病药剂防治试验

Effect of Chemical Control on Chinese Cabbage Downy Mildew

2010年引进抑快净(噁唑菌酮.霜脲氰)、甲霜.锰锌和科佳(氰霜唑)3种新型药剂进行田间大白菜霜霉病防效试验。试验结果表明,参试的几种药剂和剂量对防治大白菜霜霉病都有明显效果,但以抑快净1 500倍液、抑快净1 800倍液和抑快净2 000倍液田间防效的持效性最长,药后15 d相对防效仍达90%以上,其次是科佳450倍液,药后15 d防效在80%以上。

Control experiments of three pesticides,Yikuaijijng,Metalaxyl＋mancozeb,and Kejia in Chinese cabbage in open field were carried out.The results showed that,these pesticides had obviously effect on downy mildew control,but Yikuaijing 1 500 times,1 800 times,and 2 000 times had the best persistence efficiency in open field.After 15 days,the relative control efficiency was above 90%.The second is Kejia 450 times,after 15 days,the relative control efficiency was above 80%.