Studies carried out for many years in the experimental field in Winna Góra refer to the biocenotic regulation of aphids in agricultural cultivations by aphidophagous Diptera of Syrphidae. Experiments were carried out in conditions of an agricultural lanscape differentiated by the presence of field afforestation.
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 of the midfield thickets, especially of the habitat and the aphid host plants as reservoirs of the parasitoids is discussed.
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