[Studies on the effect-increasing components for molluscacides in nut of Areca catech L]

To investigate the effect-increasing action of Areca catech for molluscacide.

Experiments were conducted on the effect-increasing components isolated from the dry nut of A. catech.

Arecoline has been proved the most effect-increasing component.

When used with SPA arecoline could reduce markedly the doses of the two agents.