Susceptibility of Biomphalaria alexandrina to the plant Azolla pinnata and some herbicides in relation to infection with Schistosoma mansoni miracidia.
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| Abstract |
Molluscicidal activity of the herebicides 2,4-D and Graminol, as well as both extracts and dry powder of the plant Azolla pinnata were evaluated against B. alexandrina snails. It was observed that 2,4-D proved to be the most toxic compound among he tested ones, showing LC90 of 52 ppm after 24 h of exposure. Ethanol extract of Azolla showed the highest molluscicidal activity against the tested snails compared with the other extracts and dry powder (LC90 = 3300 ppm). Ethanol extract at 6600 ppm after 3 h of exposure killed 100% and 19.4% of S. mansoni miracidia and cercariae, respectively. The molluscicidal activity of 2,4-D was not influenced by the presence of Azolla (900 plants/liter) for 7 days, while Graminol effect was significantly reduced. However, the infectivity of S. mansoni miracidia to B. alexandrina snails was not affected by Azolla existence.
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| Authors | Z H Zidan, A M Hafez, M I Abdel-Megeed, M A el-Emam, F M Ragab, F A el-Deeb |
| Journal | Journal of the Egyptian Society of Parasitology (J Egypt Soc Parasitol) Vol. 28 Issue 1 Pg. 89-100 (Apr 1998) ISSN: 1110-0583 [Print] Egypt |
| PMID | 9617046 (Publication Type: Journal Article) |
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