toxicity test of plant derived molluscicides with attractant food pellets against snail, lymnaea acuminata

use of molluscicides in the attractant food pellet (afp) is an effective method of snail control. different concentrations of these molluscicides viz. azadirachta indica bark powder, allium sativum bulb powder, polianthes tuberosa bulb powder, annona squamosa seed powder, their active components azadirachtin, allicin, hecogenin, acetogenin; herbal molluscicide pestoban and a synthetic molluscicide, snail kill in the attractant food pellets containing starch and agar were tested for molluscicidal activity for 144h against the snail, lymnaea acuminata . active components of all the plant derived molluscicides were more toxic to l. acuminata than crude forms. the stability of bait formulations was studied by storing the pellets up to 4 weeks. storage of molluscicide baits caused reduction in toxicity compared to synthetic agent.