Abstract: The effects of poisoning on contact?of extraction from the root of Stellera chamaejasme by ethanol (SCEE) on 5th instar larvae of Acleris ulmicola Meyrick and Schizaphis graminum are determined. The results show that the touch poison effect of SCEE on 5th instar larvae of Acleris ulmicola Meyrick is very significant. With the concentrations?being 20mg/ml, 10mg/ml, 6.67mg/ml, 5mg/ml, 4mg/ml, the corrected death ratios are 100％, 100%, 98.20%, 95.40％, 83.18% respectively. The effect of poisoning on contact of Scee on Schizaphis graminum is relatively weak.?With the concentration?being 20mg/ml，the corrected death ratio is only 22.54%。