Antifeeding effects of bryophyte extracts from Neckera crispa and Porella obtusata against the slug Arion lusitaniens

Alcoholic extracts of one moss and one hepatic were tested for the first time for its antifeedant activity against a slug (Arion lusitaniens). In a preference test, the extracts of Neckera crispa showed low antifeedant effects in concentrations of 0.5% dry weight and more. In contrast, the extracts of Porella obtusata showed moderate effects at concentrations of 0.05% and absolute antifeedant acitivity at 0.25% dry weight.