Effect Of Permethrin On Survival And Reproduction Of Bulinus globosus Morelet 1868 And Bulinus Truncatus Audouin 1827

Abstract

The effects of permethrin on reproduction and survival of Bulinus globosus and Bulinus Truncatus are reported. Serial dilutons of the chemical were used in 96 h exposure tests on the molluscs, followed by postexposure maintenance in the laboratory for 8 weeks. There was significant decrease in oviposition with increase in pesticide concentration. There were significant differences between treatment-means for both egg mass and embryo counts for both species of molluscs. The F-LSD values at 5% alpha level for eggmass counts were 2.81 and 2.97 respectively for B. globosus and B. truncatus; 49.60 and 55.72 for the embryo counts in that order. The chemical did not produce an appreciable adverse effect on snail survival and longevity.

Keywords: Perrnethrin, Fecundity, Survival, Bulinus globosus, Bulinus truncatus

Animal Research International Vol. 1 (2) 2004 pp. 110-112