journal article
LitStream Collection
Molluscicidal Activity of Some Solanum Species Extracts against the Snail Biomphalaria alexandrina
El-Sherbini, Gehad T.;Zayed, Rawia A.;El-Sherbini, Eman T.
doi: 10.1155/2009/474360pmid: 20721329
<i >Background</i>. Snails' species are associated with transmission parasitic disease as intermediate host. Biological control stands to be a better alternative to the chemical controls aimed against snails. The search of herbal preparations that do not produce any adverse effects in the non-target organisms and are easily biodegradable remains a top research issue for scientists associated with alternative molluscicides control. <i >Method</i>. Solvent extracts of fresh mature leaves of <i >S. nigrum, S. villosum, and S. sinaicum</i> were tested against <i >Biomphalaria alexandrina</i>, a common intermediate host of <i >schistosoma mansoni</i>. A phytochemical analysis of chloroform: ethanol extract was performed to search for active toxic ingredient. The lethal concentration was determined. <i >Results</i>. Extracts isolated from mature leaves of <i >Solanum</i> species were found to be having molluscicidal properties. <i >S. nigrum</i> extract was recorded as the highest mortality rate. When the mortality of different solvent extracts was compared, the maximum (<svg style="vertical-align:-0.30096pt;width:48.337502px;" id="M1" height="11.25" version="1.1" viewBox="0 0 48.337502 11.25" width="48.337502" xmlns="http://www.w3.org/2000/svg"> <g transform="matrix(1.25,0,0,-1.25,0,11.25)"> <g transform="translate(72,-63)"> <text transform="matrix(1,0,0,-1,-71.95,63.35)"> <tspan style="font-size: 12.50px; " x="0" y="0">𝑃</tspan> <tspan style="font-size: 12.50px; " x="10.890113" y="0"><</tspan> <tspan style="font-size: 12.50px; " x="22.930502" y="0">.</tspan> <tspan style="font-size: 12.50px; " x="26.056252" y="0">0</tspan> <tspan style="font-size: 12.50px; " x="32.307751" y="0">5</tspan> </text> </g> </g> </svg>) mortality was recorded at a concentration of 90 ppm of ethanol extract of <i >S. nigrum</i>. <i >Conclusion</i>. Extract of mature leaves of <i >S. nigrum</i> exhibited molluscicidal activity followed by <i >S. sinaicum</i> and the less one was <i >S. villosum</i>. The study provides considerable scope in exploiting local indigenous resources for snails' molluscicidal agents.