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Effect of volcanic ash over Orthoptera survival in Patagonia Ecología austral
Fernández-Arhex,Valeria; Amadio,María E.; Enriquez,Andrea; Pietrantuono,Ana; Becker,Guillermo; Bruzzone,Octavio.
The aim of this work was to evaluate the ash toxicity from the Puyehue-Cordón Caulle volcanic complex on the survival of two Orthopteran species: the grasshoper Dichroplus vittigerum and the green locust Brugilis sp. Two grain size were used to evaluate the effect of volcanic eruption on these insects. Chemical analyses from this eruption proved that the ashes were very abrasive and predominantly composed of silica shards (SiO2) and aluminia (Al2O3), two substances with insecticidal properties. In northern Patagonia, both orthopteran species are polyphagous chewers on grasses and dicots. The laboratory data showed that sustained exposure to volcanic ash induced mortality in adult grasshoppers. Survival of D. vittigerum significantly decreased once exposed...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Grasshoppers; Inert dust; Locusts; Patagonia; Survival.
Ano: 2015 URL:
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