Comparative evaluation of Molluscicidal effects of Securidaca longepedunculata (Fres.) and Tephrosia bracteolate (Guilland Perr) on Bulinus globosus.

K., Olofintoye L.

doi:10.21608/eajbsf.2010.17449

Comparative evaluation of Molluscicidal effects of Securidaca longepedunculata (Fres.) and Tephrosia bracteolate (Guilland Perr) on Bulinus globosus.

Document Type : Original Article

Author

Olofintoye L. K.

University of Ado-Ekiti, Zoology Department, P. M. B. 5363, Ado-Ekiti, Ekiti State, Nigeria

10.21608/eajbsf.2010.17449

Abstract

The molluscicidal activities of ethanoic and methanoic extracts of the leaves, stem barks and roots of Securidaca longepedunculata and Tephrosia bracteolate against bred Bulinus globosus measured 0.50mm to 0.90mm in size, were investigated. The snails were exposed to a serial dilution of 0.1, 0.2, 0.5, 1.0, 2.0, 3.0, 5.0, 7.5 and 10.0ppm of the ethanoic and methanoic extracts of the leaves, stem barks and roots of S. longepedunculata and T. bracteolata for 24hrs. All tested extracts showed varied snail mortality rates with the different concentrations of ethanoic and methanoic extracts of the plants parts from 0.0 – 100.0%. The lethal concentration LC50 values ranged from 0.15-0.60ppm and LC90 values from 0.80-6.90ppm for both ethanoic and methanoic extracts of S. longepedunculata for 24hrs. The two plants showed significant difference (P<0.05) in the mortality rates of the snails (B. globosus).

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