RESUMO
<p><b>OBJECTIVE</b>To evaluate the molluscicidal activities of methanol extract of Jatropha curcas leaves against Ampullaria gigas.</p><p><b>METHODS</b>Young snails, adult snails and eggs of Ampullaria gigas were treated with the methanol extract of J. curcas leaves at different doses for different time lengths and the molluscicidal effects of the extract were evaluated.</p><p><b>RESULTS</b>The methanol extract showed a significant molluscicidal effect on the young snails at a low concentration, and treatment with 75 mg/L extract for more than 3 days resulted in a 100% mortality rate of the young snails. The Jatropha leaf methanol extract also showed toxicity to adult snails and eggs.</p><p><b>CONCLUSION</b>Jatropha leaves have a great potential for developing green pesticides to control Ampullaria gigas, but its biochemical mechanism needs further research.</p>