1Department of Zoology, Sripat Singh College, Jiaganj, Murshidabad, 742 113, West Bengal, India
Office of the Deputy Director of Fisheries, Government of West Bengal, 9A, Esplanade East, Kolkata, 700 069, West Bengal, India
Online published on 27 April, 2021.
Present study was undertaken to determine toxicity of crude leaf extracts of neem (Azadirachta indica A. Juss) on freshwater snail, Bellamya bengalensis Lamarck, 1882. The values of median lethal concentration (LC50) for 24, 48, 72 and 96 h were estimated as 15.663, 13.202, 9.539 and 7.902 g/L respectively. The mortality of snails was significantly increased with increasing concentrations of neem extract and the time of exposure. Behavioral changes with respect to crawling, , tentacle movement, clumping tendency, touch reflex and mucous secretion were noticed in the snails exposed to neem leaf extract.
Lethal concentration, Azadirachta indica, Bellamya bengalensis, Toxicity factor, Safe concentration, Behavioural changes, Oxygen consumption
