EFFECT OF SOME BOTANICALS ON MORTALITY, ADULT LONGEVITY AND OVIPOSITION OF PULSE BEETLE ON MUNGBEAN

Abstract

The experiments were conducted in the laboratory under the Department of Entomology, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from May, 2009 to September, 2009 to evaluate the effectiveness of botanicals against the pulse beetle (Callosobruchus chinensis) in mungbean. Considering the effectiveness of different botanicals for the management of C. chinensis infesting mungbean seeds, the treatment T7, T8 and T9 comprising Bankolmi, Dhatura and Korobi leaf powder respectively @ 1g/50g seeds performed the best results in respect of adult mortality, oviposition rate, adult emergence, damaged seed and weight loss over control for the species. Considering the highest percent mortality (20%) in treatment T1 and treatment T10 untreated control showed the lowest mortality percent (5%). The lowest rate of oviposition (30.50) was recorded from T7 and T8, while the highest rate of oviposition (48.00) was recorded in T3. The lowest number of adult emergence was recorded from T7 treatment, while the highest number of adult emergence (551.3) was recorded in T3. The lowest percent grain infestation by number (15%) was recoded from T7 & T2 treatments, while the highest percent grain infestation by number (28.75%) was recorded in T3. The lowest percent weight loss was recorded from T7 treatment, while the highest percent weight loss was recorded in T3. Considering the weight of pulse beetle, the lowest weight (13.13 mg) of pulse beetle was recoded from the treatment T6 and the highest weight (18.17 mg) of pulse beetle were recorded from untreated control. Considering the effectiveness of botanicals on the offspring of treated C. chinensis the highest mortality percent (10%) was recoded from the treatment T7, T8 and T9 and the lowest mortality percent (2.5%) was recorded from untreated control. The lowest rate of oviposition (8.75) was recorded from T8 and while the highest rate of oviposition (14) was untreated control. The lowest number of adult emergence (44.75) was recorded from T3 treatment, while the highest number of adult emergence (88.75) was recorded from untreated control. The lowest percent grain infestation by number (1.25%) was recoded from T7 treatment followed by T8 and T3, T1, T9 treatments respectively, while the highest percent damage by number (10%) was recorded from untreated control. The lowest percent weight loss (0.80%) was recorded from T3 treatment, while the highest percent weight loss was recorded from untreated control.