Assessing aquatic predators as bio-control agent against immature stages of Culex sp. mosquito

Abstract

The experiment was conducted on an assessment of their predatorial capacity against mosquito immature Culex sp. in the central laboratory of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh. The experiment was laid out in a Completely Randomized Design (CRD) with five replications. Three aquatics predators such as Giant water bug, Belostomata indica; Diplonychus bug, Diplonychus sp and Water striders, Aquarius adelaides were used to determination of mosquito consumption capacity for assessment of their predatorial capacity against mosquito (C. sp). In considering percentage of mosquito consumption by aquatic predators in different hours on the multifarious developing stages of mosquito, larval consumption rate and predatorial capacity was the highest in Giant water bug, Belostomata indica; whereas the lowest in Water striders, A. adelaides. But the highest percent of mosquito pupae consumption capacity was in Diplonychus bug, Diplonychus sp; the lowest percent of mosquito pupae consumption capacity in Giant water bug, B. indica andno percent of mosquito consumption capacity (0.0%) recorded in aquatic predator Water striders, A. adelaides. Overall, in Considering the predatorial capacity, the highest in Giant water bug, B. indica; the second highest Diplonychus bug, D. sp and the lowest in Water striders, A. adelaides.