Efficacy Evaluation of 25Abamectin·Etoxazole SC against Red Spider(Tetranychus cinnbarinus)in Ornamental Rose

摘要

［Objective］The paper was to understand the control effect and the optimum dosage of 25%abamectin·etoxazole SC for controlling red spider in ornamental rose.［Method］Using stem-leaf spraying method,the control effect of 25%abamectin·etoxazole SC against red spider was determined.Significance of difference was examined by Duncan s new multiple range test(DMRT).［Result］The control effect of 25%abamectin·etoxazole SC sprayed at the dose of 25-31.25 mg a.i./kg on red spider was over 82.0%at 21 d post spraying,higher than that of 110 g/L etoxazole SC sprayed at the dose of 27.5 mg a.i./kg and 1.8%abamectin EC sprayed at the dose of 9 mg a.i./kg.［Conclusion］25%Abamectin·etoxazole SC sprayed at the doses of 25-31.25 mg a.i./kg could effectively control the damage of red spider in ornamental rose,and can be widely used in production.