Mohamed ASA et al. (2000) Journal of Pesticide Science "Lethal activity of galo- and condensed tannins against the free-living soil-inhabiting nematode, Caenorhabditis elegans."

Mohamed ASA, Sato M, Islam SQ, Yamasaki T, Mori T

[Journal of Pesticide Science, 2000]

Great amounts of structurally diverse tannins are annually produced. Tannins have been well known as food phytochemicals (e.g. 3T-O-a-L-arabinopyranosyl-ent-epicatechin-(2a->O-7,4a->8)-epicat echin in cacao mass), medicinal properties (e.g. geraniin in Geranium thunbergii as tonic or antidiarrhoic) or tanning materials for leather manufacture (e.g. wattle tannins in Acacia mollissima). Recently, condensed tannin dimers (procyanidins B-1 and B-3) and its polymers were isolated from Pinus densiflora and characterized as members of the oviposition-stimulating multicomponent system in pine for the cerambycid beetle, Monochamus alternatus. Condensed tannins have also been regarded as antifeedants for phytophagous insects. A marine phlorotannin preparation, polymer of phloroglucinol, obtained from the brown alga Sargassum furvellum inhibits growth of the green algae Dunaliella and Enteromorpha spp. This paper describes isolation and identification of gallo- and condensed tannins and their nematicidal acitivity against the soil-inhabiting nematode, Caenorhabditis elegans.