Propiedades insecticidas de la ceniza del complejo volcánico Puyehue-Cordón Caulle y su posible impacto ambiental

BUTELER, MICAELA; STADLER TEODORO; LÓPEZ GARCÍA GUILLERMO P.; LASSA, M. SILVINA; TROMBOTTO LLAUDAT, D.; D´ADAMO, P.; FERNANDEZ-ARHEX, V

Revista de la Sociedad Argentina de Entomología

Laboratorio de Entomología Instituto de Investigaciones de las Zonas Áridas (IADIZA-CONICET) Centro Científico Tecnológico CONICET-Mendoza

Lugar: Mendoza; Año: 2011 vol. 70 p. 149 - 156

1851-7471

species tested, when mixed into the substrate atlow concentrations. Susceptibility to ashes differs between the two specieswhen tested in a seven day continuous exposure bioassay [CL99(Oryzaephilussurinamensis L.) = 10.25 mg.g-1; CL99((Tribolium castaneum (Herbst)) = 4.96mg.g-1]. These results agree with those reported in the literature on effectsof volcanic eruptions and suggest that the impact of the ashes from thePuyehue-Caulle Range volcanic complex on the insect community may beradical in the acute deposition phase, with substantial qualitative effects inthe chronic phase of exposure. Also, the recovery of populations affected byash in desert areas where dry ash persists will be slower, and this will havetangible and long-term consequences for insect host plants, pollination andon the development of populations of vertebrate insectivores. By contrast,the presence of ash in humid regions will impact the ecosystem by theaddition of nutrients, which in combination with water retention by the ashwill lead to a qualitative and quantitative recovery of the populations underfavorable conditions.