private correspondence

Effect of sublethal (20 % and 60 % of 24h LC 50) feeding of molluscicides (eugenol, ferul ic acid, umbell iferone and limonene) in bait containing binary combination (1:1 ratio) of amino acids (val ine, aspartic acid, lysine and alanine) on the, hatchabil ity and survival of young snails of Lymnaea (Radix) acuminata (Lamark) was studied. I t was observed that the different amino acid combinations of bait formulation with molluscicides significantly reduced the reproductive capacity (fecundity, hatchabil ity and survival of young snails) of the snail Lymnaea acuminata. Maximum in reduction of fecundity was observed in valine + aspartic acid + ferul ic acid (28.89 % of control). In withdrawal group there is a significant recovery observed in al l feeded group (85.95 % of control)