Chitinase in Vicia faba leaves:induction by APhis craccivora──a convergent plant physiological stress reaction CONTROL OF BEAN LEAF ROLL VIRUS IN BROAD BEAN WITH INSECTICIDES Efficacy estimation of aphid parasitoid Lysiphlebus fabarum against cowpea aphid Aphis craccivora with life table technique The influence of 4 species of preys on the development and fecundity of Orius similis Zheng Biochemical and metabolic alterations in Aphis craccivora Koch parasitized by Lysiphlebus japonicus Ashmead Effect of different preys on the predation and prey preference of Orius similis