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Laboratory and Field Trials of a Slow-Release Copper Molluscicide in St. Lucia
John D. Christie
John D. Christie
Research and Control Department, P.O. Box 93, Castries, St. Lucia, West Indies
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Michael A. Prentice
Michael A. Prentice
Research and Control Department, P.O. Box 93, Castries, St. Lucia, West Indies
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Edward S. Upatham
Edward S. Upatham
Research and Control Department, P.O. Box 93, Castries, St. Lucia, West Indies
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Guy Barnish
Guy Barnish
Research and Control Department, P.O. Box 93, Castries, St. Lucia, West Indies
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Tests of a slow-release molluscicide containing 50% copper sulfate were undertaken in laboratory and field situations in St. Lucia. In laboratory trials, a granule form of the molluscicide produced 100% mortality of Biomphalaria glabrata down to 4 mg/liter active ingredient (a.i.), while the pellet form produced 100% mortality down to 8 mg/liter a.i. In field trials, a dose of 100 mg/liter a.i. in granule form caused mortality of B. glabrata in banana drains but had no effect on B. glabrata populations in a marsh habitat. In both habitats, the dose of 100 mg/liter produced mortality of other molluscan fauna which caused changes in the molluscan diversity indices. This failure in field trials may have been due to dilution of copper levels caused by flooding and also by uptake of copper by mud and algae.
Author Notes
Staff members of The Rockefeller Foundation, 1133 Avenue of the Americas, New York, New York 10036.
Present address: World Health Organization, P.O. Box 374, Mogadishu, Somalia.
| Past two years | Past Year | Past 30 Days | |
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