The molluscicidal properties of Ambrosia maritima L. (Compositae) . 2. Results from a field trial using dry plant material
El Sawy, M.F.; Duncan, J.; Marshall, T.F.; Shehata, M.A.; Brown, N.
Tropenmedizin und Parasitologie 35(2): 100-104
1984
ISSN/ISBN: 0303-4208 PMID: 6464183 Document Number: 241786
A field trial in Egypt of the plant molluscicide, Ambrosia maritima is described. Applications of 140, 70 and 35 mg/l-1 dry, whole plant were made to irrigation canals and drains in June. The treatment effect took between 1 and 5 weeks to become fully established. The reduction in the numbers of alive Biomphalaria alexandrina snails was generally more than 90% and was virtually the same at all treatment levels and in both types of watercourse. The snail population remained at a low level for at least 3 months until September-October. The possible use of a single, annual application in April or May in controlling snails throughout the main schistosomiasis transmission season in Lower Egypt is suggested.