Snails (Lymnaea acuminata) were exposed to four concentrations of garlic extract in an aquarium. Snail deaths were recorded every 24 hours over four days. Results showed that the molluscicide effect of garlic is time-as well as dose-dependent. When the toxicity of garlic was compared with the synthetic molluscidides phorate, formothion and carbaryl, the garlic extract proved more potent than phorate and carbaryl and less potent than formothion. Garlic extract is one fifth less potent than niclosamide.
Further extraction and purification of the active molluscicide in garlic may reveal that it is more effective than synthetic molluscicides in controlling snails, as well as less harmful to the environment.
Dept. of Zoology
University of Gorakhpur
Gorakhpur - 273 009
Uttar Pradesh, INDIA