The miticidal activity of 15 kinds of crude extracts from five Chinese medicines,including Cnidium monnieri,Pulsatilla chinensis,Stemona japonica,Pinellia ternata and Syringa oblate by three different solvents were determined against Tetranychus urticae by using the slide-dip method.The bioassay results showed that the corrected death rate of T.urticae was 100% at 24 h after treated with 5.00 mg/mL acetone-C.monnieri(ASCZ)and chloroform-C.monnieri(C-SCZ),which showed a good miticidal activity.The virulence ...