Toxicity of three comercial tannins to the nuisance invasive species Limnoperna fortunei (Dunker, 1857): implications for control.

PATRICIO JAVIER PEREYRA; BULUS ROSSINI, GUSTAVO; DARRIGRAN, GUSTAVO ALBERTO

FRESENIUS ENVIRONMENTAL BULLETIN

PARLAR SCIENTIFIC PUBLICATIONS (P S P)

Año: 2011 vol. 20 p. 1432 - 1437

1018-4619

Adding biocides to water is one strategy to control macrofouling organisms. A natural biocide that helps to prevent/control macrofouling of Limnoperna fortunei (Dun- ker, 1857) on human installations is one way to minimize en- vironmental impacts of different control strategies. Labora- tory tests were carried out to evaluate effects of three com- mercial tannis preparations (ECOTEC®-UA, ECOTEC®-L and ECOTEC®-MC) on the survival of two life-history stages (larvae and adults) of L. fortunei. In addition tests were performed on two non-target species, a crustacean Daphnia magna and a plant Lactuca sativa, to evaluate effects of these tannins on the aquatic environment. The larvae of L. fortunei were more vulnerable to the concentra- tions of the three tannins than adults. The two non-target species were not affected at concentrations that were effec- tive for larvae. These results suggest that these products could be used as biocides to control macrofouling caused by L. fortunei.