INVESTIGADORES
NATALE Guillermo Sebastian
artículos
Título:
Impact of endosulfan and cypermethrin mixture on amphians under field use for biotech soy bean production
Autor/es:
AGOSTINI M.G.; NATALE G.S.; RONCO A.E.
Revista:
International Journal of Environment and Health (IJEnvH)
Editorial:
Inderscience publishers
Referencias:
Año: 2009 vol. 3 p. 379 - 389
ISSN:
1743-4955
Resumen:
This study presents results at a local scale of the impact of pesticide
aerial applications containing a mixture of endosulphan and cypermethrin
on anurans assessed by means of field evaluations. Additionally, effects
were compared with laboratory toxicity tests in standardised conditions. Field
assessment with native population allowed the detection of dead anuran larvae
of the species present in the stream of water after fumigation, in coincidence
with the decrease in the frequency of live larvae (p < 0.01) from sampling nets.
Cage experiments showed significant differences (p < 0.01) in anuran larvae
survival before and after fumigations. Laboratory acute toxicity tests with
endosulphan formulation demonstrated sublethal symptoms in Hypsiboas
pulchellus larvae 24 h after initial exposure time. The 96 h LC-50 was 0.13 µg
endosulphan/litre, which is over 1000 times lower than the cypermethrin
LC-50 value. Endosulphan seems to be the insecticide responsible for the
drastic effects on anuran larvae detected in the field during studied events.