THE STUDY ON BIOLOGICAL CHARACTERISTICS OF Brontispa longissima (GESTRO) (COLEOPTERA: CHRYSOMELIDAE) Nghiên cứu đặc điểm sinh học của Bọ dừa Brontispa longissima (Gestro) (Coleoptera: Chrysomelidae)

o C, 60-70% RH and 12L: 12D photoperiod. Leaves of Typha angustifolia Lesser were recommended to use as food for mass rearing. The duration of mating of B. longissima averaged 9.0 ± 1.3 min. The pre-oviposition of adult was 22.5 ± 1.4 days. Female laid on average 24.5 ± 4.4 eggs, adult longevity was over 2 months. Egg deposition of B. longissima is higher during the night time compared to the day time. Larvae in general have 4 instars. Temperature had a significant effect on developmental time of larvae, the higher temperature, the shorter duration of development. High humidity (>95%) is suitable for survival rate and development of B. longissima eggs.