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The investigations conducted in 1994 and 1996 concerned aphids infesting fields and neighbouring semi-natural habitats – midfield thickets with trees and the vegetation growing on the ditch margins. Aphids were caught into Moericke traps placed at the plant level. The material collected was studied to determine aphid number, dominance of individual species, similarity of dominance structure of aphid...
Occurrence of aphid species was studied in four types of midfield thickets in the Lower Vistula Landscape Park in Poland. This paper presents and discusses the relationships between aphid communities, their species diversity and dominance structure in these thickets.
The guilds of primary parasitoids (Ichneumonoidea: Aphidiidae, Chalcidoidea: Aphelinidae) as well as hyperparasitoids (Chalcidoidea: Pteromalidae, Encyrtidae, Eulophidae; Cynipoidea: Charipidae: Alloxystinae, Ceraphronoidea: Megaspilidae) of the two aphid species (Homoptera: Aphididae): Aphis fabae SCOP. on spindle tree and Aphis sambuci L. on common elder in midfield thickets are presented. A role...
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