Effect Of Permethrin On Survival And Reproduction Of <i>Bulinus globosus</i> Morelet 1868 And <i>Bulinus Truncatus</i> 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