SciELO - Scientific Electronic Library Online

vol.78 número3Osteología craneal comparada de tres especies de lenguado del género Paralichthys (Pleuronectiformes, Paralichthyidae) del Atlántico suroccidental¿Obsesionada con gramíneas?: El caso de mara Dolichotis patagonum (Caviidae: Rodentia) índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados




Links relacionados


Revista chilena de historia natural

versión impresa ISSN 0716-078X


GONZALES, WILFREDO L.; CABALLERO, PAULA P.  y  MEDEL, RODRIGO. Galler-induced reduction of shoot growth and fruit production in the shrub Colliguaja integerrima (Euphorbiaceae). Rev. chil. hist. nat. [online]. 2005, vol.78, n.3, pp.393-399. ISSN 0716-078X.

We evaluated experimentally the effect of a gall-maker insect on vegetative and reproductive traits of the shrub Colliguaja integerrima (Euphorbiaceae). We performed two experiments: (1) a chemical (insecticide) exclusion to prevent gall formation, and (2) a mechanical removal of new galls at the early stage to prevent gall growth. In the study area, galled shrubs were common (77 %). Because the pattern of insect attack may influence plant fitness, the distribution of egg clusters deposited by the galler and the number of galls among shrubs were also evaluated. Fruit production was inversely associated with the number of galls, but did not correlate with shrub height, shrub cover, and number of shoots. Ungalled shoots were longer than galled shoots after 12 months initiated the experiment. Chemical exclusion produced a delayed positive effect on plant reproduction. Fruit production was higher in experimental than control branches after 24 months. Mechanical removal of galls increased fruit production in comparison to control branches in the next reproductive season. These results indicate that the galler reduces shoot growth, and has a delayed detrimental impact on fruit production of C. integerrima. Because the chance of finding new galls was higher on the previously infected shrubs, it is possible that reinfection processes account for the cumulative negative effects of the bud-galling insect on plant fitness

Palabras clave : bud-galling insect; central Chile; Mediterranean ecosystem.

        · resumen en Español     · texto en Inglés     · Inglés ( pdf )


Creative Commons License Todo el contenido de esta revista, excepto dónde está identificado, está bajo una Licencia Creative Commons