Species Diversity and Dynamics of Some Light Trap Attracted Insects

An investigation was carried out to study the population dynamics and species diversity of some light trap attracted insects during July, 2021 to June, 2022 in the rice field near Bhattadev University, Bajali campus. The specimens were qualitatively and quantitatively sampled using light trap for 52 nights with the presence of total 2482 insects belonging to the order Coleoptera, Diptera and Lepidoptera. The Shannon- Wiener diversity index, Simpson index (1-D) and Equitability (J) values reached their peak in June, 2022. On the other hand, the highest index of Evenness and Berger-parker index of dominance values were observed in February, 2022. The dominance index exhibits a stable varied insect family in the study area and the phototactic behaviour can be vary due to light intensity.