BIOLOGY OF BRACHYMERIA BENGALENSIS (CAMERON) AND BRACHYMERIA LASUS (WALKER) (HYMENOPTERA : CHALCIDIDAE) PUPAL PARASITOIDS OF PIERIS BRASSICAE (LEPIOOPTERA : PIERIDAE)

摘要

Developmental biology of Brachymeria bengalensis (Cameron) and B. lasus (Wlk.) of Pieris brassicae was studied in laboratory. The female parasitoid preferred only 2 to 3 days old pupa for parasitization. They usually deposited one egg in a host pupa.On an average a female laid 19-21 eggs during its life time. The females lived longer than males. Sex ratio is highly female biased.