以5%锐劲特悬浮剂为对照药剂,进行了1%蛇床子素.8 000 IU/μlB t水悬浮剂防治菜青虫试验。结果表明:一次药后3 d 1%蛇床子素.8 000 IU/μlB t水悬浮剂300、400、500倍液的防效分别为63.3%、49.3%和37.1%,对照药剂锐劲特1 000倍液的防效94.7%;一次药后7 d 1%蛇床子素.8 000 IU/μlB t水悬浮剂300、400、500倍液的防效分别为97.8%、92.3%和90.0%,对照药剂防效为98.0%。 A 5% Firrester suspension was used as a control agent, and 1% osthole was tested. The results showed that the control efficacies of 300, 400 and 500 times of 1% osthole and 1% osthole were respectively 63.3%, 49.3% and 37.1% at 8 000 IU / μlB t aqueous suspensions, 000 times the control solution 94.7%; 7 d after a drug 1% osthole .8 000 IU / μlBt water suspension 300,400,500 times the liquid control effect were 97.8%, 92.3% and 90.0%, respectively, The control efficacy was 98.0%.