Effects of the Mixture of Bt and Chlorbenzuron on the Activity of Midgut Proteinase, Haemolymph Proteins on 4th Instar Larvae of Hyphantria cunea Insecticidal activity of Cry2Ab proteins to Agrotis ypsilon THE INFECTIOUS ROUTE OF NUCLEAR POLYHEDROSIS VIRUS IN THE MIDGUT EPITHELIAL CELLS OF Helicoverpa armigera Influence of API-transgenic cotton plants on growth and midgut proteases activity to Helicoverpa armigera larvae STUDIES ON INTRODUCTION AND UTILIZATION OF THE PINE CATERPILLAR DENDROLIMUS SPECTABILIS CPV HISTOPATHOLOGICAL STUDY ON CYTOPLASMIC POLYHEDROSIS VIRUS OF THE PINE CATERPILLAR (DENDROLIMUS TABULAEFORMIS)