To study the extraction method and basic physical and chemical property of toxin from Dendrolimus punctatus Walker,four different polar solvents were used in the extraction of the toxin with new detection methods,rabbit skin test and acute toxicity test,which were firstly used in the study on toxin from Dendrolimus punctatus Walker.The results showed that the active components of the toxin could be more easily melted in 80% alcohol and utterly in distilled water, but incompletaly melted in n-butanol and n-hexane.The result of rabbit skin test s...