Effect of different combinations of MGK-264 or piperonyl butoxide with plant-derived molluscicides on snail reproduction

Effect of sublethal treatment (20% and 60% of LC50/24 h) of plant-derived m olluscicides, viz. Polianthes tuberosa, Trachyspermum ammi, Allium sativum powder; Azadirachta indica oil; oleoresin of Zingiber officinale; and their active molluscicidal component in combination (1:5) with MGK-264 or pipero nyl butoxide on the reproduction of snail Lymnaea acuminata have been studi ed. It was observed that the combination of plant derived molluscicide and their active molluscicidal components, viz. tigogenin, hecogenin, azadirach tin, allicin, thymol, and [6]-gingerol combination with MGK-264 or piperony l butoxide caused a significant reduction in fecundity, hatchability, and s urvival of young snails. Withdrawal of snails to fresh water after the abov e treatment caused a significant recovery in the fecundity of L. acuminata.