Efficacy of three kinds of insecticides against Blattella germanica

Objective To study the efficacy of Youshi,Responsar and Vedei against Blattella germanica. Methods Forcibly contacting.The efficacy of three insecticides and continuing efficacy after 60 days and 120 days were determined. Results When the dosages of Youshi,Responsar and Vedei were all 5～20 ai mg/m~2,most of Blattella germanica were knocked and killed on glass and ceramic tile.The 72 h mortality were above 90% after 120 days. Conclusion The mortality of three insecticides on paint were poor.The dosages should increase when the insecticides were used on paint.Youshi,Responsar and Vedei had good efficacy against Blattella germanica.