Some biological effects of bayluscide on physa acuta and helisoma duryi

The fecundity, viability and the size of egg-masses were studied in Physa acuta and Helisoma duryi snails treated with 1 ppm bayluscide for 2 hours. Bayluscide application caused significant and highly significant reduction in the fecundity of both Physa acuta and Helisoma duryi. However, an increase in the fecundity was observed for both treated snails in few days after exposure. Moreover, Bayluscide did not lead to stoppage of egg-laying at any day of experiment. Bayluscide caused a reduction in the viability of egg- masses produced by treated Physa acuta or Helisoma duryi snails, since they produced higher numbers of abnormal eggs containing dead embryo. Moreover, application of 1 ppm Bayluscide for 2 hours against Physa acuta caused a decrease in the size of egg-masses produced by treated snails. This was expressed by the production of higher percentage of egg-masses containing small numbers of eggs as compared with those masses produced by control snails

Effect of mollutox on tissue glycogen, lipid and protein content in physa acuta and helisoma duryi snails

Tissue glycogen, lipid and protein content were determined in normal snails and those treated with molluscicides. Normal Helisoma duryi was found containing more tissue glycogen, lipid and nearly the same protein content compared to that of Physa acuta snails. Application of mollutox against Ph. acuta caused nonsignificant decrease in tissue glycogen, lipid content and nonsignificant increase in tissue protein content. In H. duryi, the changes due to the application of mollutox were highly significant in both tissue lipid and protein content, while nonsignificant change was noticed in tissue glycogen