KakakhelS. Ahqabullahphd2006TRI-TROPHIC LEVEL INTERACTION AMONG HOST PLANT (RAPESEED-MUSTARD), TURNIP APHIC (LIPAPHIS ERYSIMI KALT.), PARASITOID (DIAERETIELLA RAPARE M’INTOSH.) AND ITS AUGMENTATION ON BRASSICA NAPUSUniversity of Arid Agriculture, Rawalpindi142