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Title

The effect of plant diversity on the spatio-temporal distributions of pea aphids (Acyrthosiphon pisum) and carabids (Coleoptera: Carabidae) in field pea crops

AuthorsŠafář, Jan; Seidenglanz, M.; Huňady, I.; Hlavjenka, V.; Villegas-Fernández, Ángel M.
Issue DateSep-2017
CitationInternational Conference Advances in grain legume breeding, cultivations and uses for a more competitive value-chain (2017)
AbstractDuring 2016–2017 distribution patterns of pea aphids (Acyrthosiphon pisum) and predatory ground beetles (Carabidae) and the spatio-temporal associations between the two groups of insects were analysed in field pea monocrops and in field pea / barley intercrops. The objectives of the large plot trials were to find out if there are some differences in patterns of spatio-temporal distributions of the aphids and the carabids in the compared crops and if the spatio-temporal associations between the pest and the predator distributions can be influenced by the plant diversity in crops. The spatial patterns of insect counts (aphids, carabids –assessed totally and separately for the individual species) were analysed using SADIE. The tendency towards significant spatio-temporal association (p<0.025) between distribution of aphids and the four important species of carabids were recorded in intercrops even monocrops in some dates. It indicates that these species should play important role in diminishing of aphid populations during their development in crops because they were actively looking for the zones with higher abundances of aphids (at these places the probability that aphids fall down is higher). At the same time in some cases decreases in aphid populations were recorded at the zones in crops where previously higher abundances of carabids were recorded (significant spatial dissociation in their distributions; p>0.975). That shows some species (especially Poecilus cupreus, Pterostichus melanarius, Pseudoophonus rufipes and P. griseus) should play important role in diminishing of aphid populations during their development in crops and can serve as effective biological agents.
DescriptionTrabajo presentado en la International Conference Advances in grain legume breeding, cultivations and uses for a more competitive value-chain, celebrada en Novi Sad (Serbia) el 27 y 28 de septiembre de 2017.
URIhttp://hdl.handle.net/10261/167114
Appears in Collections:(IAS) Comunicaciones congresos
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