The activities of superoxide dismutase （SOD） ,peroxidase（POD） and catalase（CAT） in 3th instar Chihuo zao were tested with conventional biochemical method after photo and dark reactivation treated by the chloroform extracts（TPC）which was obtained by sohxlet method from the root of Tateges erecta. The results showed :In the dark,the activities of POD,and CAT in treated group were obviously significant higher than those in contrasting group;In the light,the activities of SOD,POD,and CAT could be inhibited by TPC,after larvae had been exposed to photo lights radiation for 1 h. The more longer of the photo lights radiation,the more stronger of the inhibition. The results indicated that TPC possessed high photo-activity.
