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Journal of Toxicology
Volume 2011 (2011), Article ID 803451, 10 pages
Research Article

Formulated Beta-Cyfluthrin Shows Wide Divergence in Toxicity among Bird Species

1Estación Experimental Agropecuaria Paraná, Instituto Nacional de Tecnología Agropecuaria (INTA), Ruta 11 km 12.5, Paraná, 3100 Entre Ríos, Argentina
2Instituto de Recursos Biológicos, Instituto Nacional de Tecnología Agropecuaria (INTA), Castelar, 1712 Buenos Aires, Argentina
3Science and Technology Branch, Environment Canada, Ottawa, ON, Canada KIA 0H3

Received 9 August 2010; Revised 26 November 2010; Accepted 21 January 2011

Academic Editor: Virginia Moser

Copyright © 2011 Laura M. Addy-Orduna et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


It is generally assumed that the toxicity of pyrethroid insecticides to birds is negligible, though few species have been tested. The oral acute toxicity of formulated beta-cyfluthrin was determined for canaries (Serinus sp.), shiny cowbirds (Molothrus bonariensis), and eared doves (Zenaida auriculata). Single doses were administered to adults by gavage. Approximate lethal doses 50 ( ) and their confidence intervals were determined by approximate D-optimal design. Canaries were found to be substantially more sensitive to formulated beta-cyfluthrin (  mg/kg) than the other two species tested (  mg/kg and  mg/kg, resp.). The obtained for canaries was also considerably lower than typical toxicity values available in the literature for pyrethroids. This study emphasizes the need for testing a broader range of species with potentially toxic insecticides, using modern up and down test designs with minimal numbers of birds.