The Validity of Osthole Powder against Main Stored-grain Insects

The validity of Osthole powder against 5 species of main stored-grain insects were studied in this paper.The re-sults showed that the validity of high dosage was better than low dosage,and the validity was vary with different control object.Under the using dosage 1.6 mg·kg-1 and 0.8 mg·kg-1,there were the longest validity to S.zeamais and R.dominica,latter validity to C.pusillus and T.castaneum,lattermost validity to O.surinamensis.After 6 months treatment,the corrected mortality of adult of S.zeamais and R.dominica were 96.67%,91.11% and 100.00%,96.43%.After 4 months treatment,the corrected mortality of adult of C.pusillus were 97.37% and 78.95%.After 3 months treatment,the corrected mortality of adult of T.castaneum were 100.00% and 61.11%.After 2 months treatment,the corrected mortality of adult of O.surinamensis were 94.12% and 58.82%.Under the same conditions,The validity of osthole powder adding pesticide synergis was better than Guchongjing(1000 mg·kg-1) and Fangchongling(10 mg·kg-1) to adult of S.zeamais,R.dominica,C.pusillus,T.castaneum,and O.surinamensis under 1.6 mg·kg-1,0.8 mg·kg-1.Then 0.8 mg·kg-1 dosage was befittingly to put in practice in the futrue.