Toxicity of Some Species of Annona Toward Artemia salina Leach and Biomphalaria glabrata Say

Abstract

In the search for plant molluscicides for the vector control ofschistosomiasis, ethanolic extracts from different parts of six speciesof the Annonaceae family were evaluated against adult forms and eggmasses of Biomphalaria glabrata. Results from accurate experimentsindicate that the majority of the analyzed extracts possess propertieslethal to B. glabrata, some of them with significant LD90 values (< 20ppm), as showed for Annona crassiflora M. [pulp and seed (13.21 ppm),stem (2.34 ppm), root bark (3.79 ppm)], A. glabra L. [seed (17.02ppm)], A. muricata [leaf (8.75 ppm) and stem bark (3.79 ppm)], A.pisonis [stem bark (6.21 ppm)], A. salzmani D. [leaf (1.37 ppm)] andA. squamosa Veil. [root (8.55 ppm)]. Emphasis is held mainly into A.muricata L. (leaf) and A. squamosa Veil. (root) for presentingadditional toxicity toward snail eggs masses.