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Molluscicidal Activity of Methomyl and Cardenolide Extracts from <em>Calotropis procera</em> and <em>Adenium</em> <em>arabicum</em> Against the Land Snail <em>Monacha cantiana</em>

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Author(s): Ali Al-Sarar | Hamdy Hussein | Yasser Abobakr | Alaa Bayoumi

Journal: Molecules
ISSN 1420-3049

Volume: 17;
Issue: 5;
Start page: 5310;
Date: 2012;
Original page

Keywords: molluscicides | Monacha cantiana | Adenium arabicum | Calotropis procera | cardenolides | land snails

ABSTRACT
In this work, we have evaluated the molluscicidal activity of two cardenolide extracts from Adenium arabicum Balf f. [the benzene (B) and methanol (M) extracts], one cardenolide extract from Calotropis procera (Aiton) W.T. Aiton (extract C), and methomyl against the harmful land snail Monacha cantiana (Montagu). The contact LD50 values for the above mentioned plant extracts were 12.62, 34.63, and 34.35 mg·kg−1 of body weight, respectively, while the LD50 for methomyl was 116.62 mg·kg−1, that is, the plant extracts were 9.24, 3.37, and 3.4 times more toxic than methomyl. In addition, a simple colorimetric method, based on Kedde reagent, was modified to determine cardenolide concentrations in plant extracts. Thin layer chromatography analysis (TLC) showed several cardiac glycosidal compounds in each plant extract. The results proved that cardiac glycosides are promising candidate compounds that could be used to control land snails, or exploited to develop new, effective, and environmentally friendly molluscicides.

Tango Jona
Tangokurs Rapperswil-Jona

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