Molluscicidal effect of some plant extracts against two land snail species, Monacha obstructa and Eobania vermiculata

Document Type : Original Article

Author

Plant protection Res. Inst., Agric. Res. Center, Giza, Egypt

Abstract

The molluscicidal effects of five ethanolic
crude extracts, Cumin (Cuminum cyminum), Golden shower (Cassia
fistula
), Umbrella tree (Melia azedarach), Olive (Olea europaea)
and pomegranate (Punica granatum) were evaluated against two land snail
species, Monacha obstructa and Eobania vermiculata, under
laboratory conditions. Three methods of bioassay were used, i.e. contact,
leaf-dipping and bait techniques. The results indicated that the ethanol crude
extract of Cumin was the most toxic extract for the two tested land snail
species followed by Golden shower, Umbrella tree and pomegranate extracts while
Olive extract had the lowest effect. The land snail, E. vermiculata was
comparatively less susceptible to the tested plant extracts than the land
snail, M. obstructa. Results showed that, contact technique of the
tested plant extracts was the most effective method of application. The LC50
values of Cumin, Golden shower, Umbrella tree, Olive and Pomegranate extracts
when applied as contact were 250, 325, 635, 1500 and 910 ppm for M.
obstructa
and 288, 380, 682, 1720 and 965 ppm for E. vermiculata,
respectively.

Keywords