Host plant and natural enemy impact on cereal aphid competition in a seasonal environment
Author
dc.contributor.author
Gonzáles, Wilfredo L.
Author
dc.contributor.author
Fuentes-Contreras, Eduardo
Author
dc.contributor.author
Niemeyer, Hermann M.
Admission date
dc.date.accessioned
2018-12-20T14:26:40Z
Available date
dc.date.available
2018-12-20T14:26:40Z
Publication date
dc.date.issued
2002
Cita de ítem
dc.identifier.citation
Oikos, Volumen 96, Issue 3, 2018, Pages 481-491
Identifier
dc.identifier.issn
00301299
Identifier
dc.identifier.other
10.1034/j.1600-0706.2002.960310.x
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/155977
Abstract
dc.description.abstract
Competition between phytophagous insects could be mediated by differential impact of natural enemies or by induced changes in host plant quality. The interaction between the aphids Sipha flava and Rhopalosiphum maidis on the shared host plant, Sorghum halepense, was evaluated during the fall and spring seasons in the presence or absence of natural enemies in a garden experiment. During the fall, S. flava was negatively affected by R. maidis in all treatments. However, during the spring season, S. flava was not affected by R. maidis when natural enemies were excluded, and positively affected by R. maidis with natural enemies present. Rhopalosiphum maidis was negatively affected by S. flava during the fall and spring seasons under all treatments. Laboratory experiments demonstrated that changes in host plant quality induced by S. flava attack and the presence of the parasitoid Lysiphlebus testaceipes negatively affected R. maidis, but not S. flava. Under abiotic conditions simulating fal