In the course of 2013-2015 abundances of pea aphid (A. pisum) and their natural enemies found on field pea plants, grown either as a monoculture or intercropped with spring cereals and some other legumes, were compared. Two types of trials were used: small plot trials and large plot trials. Pea aphid colonies in field peas in tercropped with cereals developed differently than in pea monocrops. However, the small plot trials showed different results to the large plot trials. In the small plot trials on intercropped plots pea aphid numbers were higher during the first part of crop colonisation, but the decline in aphid populations also happened earlier. In the large plot trials pea aphid abundances were significantly lower in field pea –barley intercrops compared to monocrops during the whole duration of crop infestation. Pea aphid colonies encountered syrphid larvae attacks more frequently in intercrops than in monocrops.

Trabajo presentado en el Second International Legume Society Conference "Legumes for a sustainable world" (ILS2), celebrado en Tróia (Portugal) del 11 al 14 de octubre de 2016.

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