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dc.contributor.authorPons i Domènech, Xavier
dc.contributor.authorLumbierres i Bardají, Belén
dc.contributor.authorAlbajes Garcia, Ramon
dc.description.abstractThe relationships between predatory Heteroptera and their potential prey species were investigated during two crop seasons in an inter-mountain area close to the Pyrenees (Iberian Peninsula). Regression was used to analyze the potential numerical responses shown by heteropterans to aphids and other potential prey during alfalfa intercuts (the plant growth period between cuts) of high aphid occurrence. The most abundant heteropterans were Orius spp., Nabis spp. and mirids, and all were present in alfalfa stands throughout the season. Acyrthosiphon pisum was the prevalent species during the 2nd intercut, Therioaphis trifolii during the 4th and Aphis craccivora during the 5th. We performed simple regression analysis between the Orius sp., Nabis sp. and mirids and the prevalent aphid species, forward multiple regression analysis between heteropterans and all possible soft-bodied prey species; and both analyses for coccinellids, as relative aphid predator specialists. The heteropterans responded numerically to A. pisum but not to T. trifolii or A. craccivora. Heteropterans also showed numerical responses to other potential prey (leafhoppers, thrips, and other soft bodied prey) that remained at low densities throughout the season. All these preys may contribute to the presence of heteropterans in alfalfa stands throughout the season. The results suggest that heteropterans may contribute to reduce A. pisum, particularly at the beginning of the growing season, and on other potential pests when they invade or recolonize alfalfa, and may help to delay or prevent the build-up of these pest populations.ca_ES
dc.description.sponsorshipThis research was funded by the Cooperativa Pirenaica de La Seu d’Urgell.ca_ES
dc.publisherCzech Academy of Sciences. Institute of Entomology of the Biology Centreca_ES
dc.relation.isformatofReproducció del document publicat a
dc.relation.ispartofEuropean Journal of Entomology, 2009, vol. 106, núm. 3, p. 369-378ca_ES
dc.rightscc-by (c) Czech Academy of Sciences. Institute of Entomology of the Biology Centre, 2009ca_ES
dc.subjectTherioaphis trifoliica_ES
dc.titleHeteropterans as aphid predators in inter-mountain alfalfaca_ES

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cc-by (c) Czech Academy of Sciences. Institute of Entomology of the Biology Centre, 2009
Except where otherwise noted, this item's license is described as cc-by (c) Czech Academy of Sciences. Institute of Entomology of the Biology Centre, 2009