Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract Full Text

Neem, Azadirachta indica, as a potential biopesticide for controlling the apple snail, Pomacea canaliculata.


Experiments were undertaken to assess the efficacy of methanol and water extractions of fresh neem (Azadirachta indica) seed against apple snails. Each assay included five neem treatments (10-50% dilutions of concentrated extract), a control treatment and a chemical treatment using Niclosamide. Assays were replicated. Snail mortality was recorded at 24, 48, 72 and 96 h. There was little difference between the extracts obtained by methanol and water extractions. Mortality increased over time and with neem extract concentration. The highest concentration of neem extract (50% dilution) resulted in similar mortality levels to the Niclosamide treatment. The study showed that fresh neem seed extract has potential as a botanical pesticide against apple snails.