INIBIOMA   20415
INSTITUTO DE INVESTIGACIONES EN BIODIVERSIDAD Y MEDIOAMBIENTE
Unidad Ejecutora - UE
artículos
Título:
Cumulative effects of volcanic ash on the food preferences of 2 Orthopteran species
Autor/es:
FERNÁNDEZ ARHEX, VALERIA CRISTINA; AMADIO, MARÍA EMILIA; BRUZZONE, OCTAVIO AUGUSTO; FERNÁNDEZ ARHEX, VALERIA CRISTINA; AMADIO, MARÍA EMILIA; BRUZZONE, OCTAVIO AUGUSTO
Revista:
INSECT SCIENCE
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Lugar: Londres; Año: 2017 vol. 24 p. 640 - 646
ISSN:
1672-9609
Resumen:
Inert dusts are an early form of insecticide which is still in use. One of the most common inert dusts is volcanic ash. In order to study the reaction of rangeland grasshoppers, Dichroplus vittigerum (Acrididae) and a katydid, Burgilis mendosensis (Phaneropteridae), to the presence of volcanic ash in their food sources and how this reaction changed as a function of time, we conducted paired preference tests between clean leaves of their preferred host plant and leaves exposed to volcanic ash of different grain size. The behavioral response was measured as the rating on the Thurstonian preference scale of leaves with ash in relation to clean leaves. The results showed that the avoidance of volcanic ash increased as a function of time in both species. Both species studied are occasionally exposed to volcanic activity, and come from an area in which a volcanic eruption had recently occurred. As their populations did not decrease after the ash fall, we propose that some behavioral responses such as avoidance of places with ash, works as tolerance mechanism to inert dusts exposure.