Primer registro en la Península Ibérica de Oobius rudnevi (Nowicki, 1928) (Hymenoptera: Encyrtidae), un parasitoide oófago poco conocido de Cerambyx sp. (Coleoptera: Cerambycidae)

Abstract

Oobius rudnevi (Nowicki, 1928) (Hymenoptera: Encyrtidae) is first reported from Iberia and southern Europe using sentinel eggs. The parasitoid was detected in July 2016 in three oak open woodlands in Extremadura (SW Spain), located in Almendral (La Jara) and Merida (La Serrana and Cornalvo Natural Park). O. rudnevi para-sitized both the eggs of Cerambyx cerdo Linnaeus, 1758 (its only known host to date) and C. welensii (Kuster, 1845), which constitutes a new host-parasitoid association (C. welensii-O. rudnevi). Parasitism rate was quite variable among sites and dates (range 0–93%), with a higher prevalence in C. cerdo than in C. welensii. New studies are conducted in the field and laboratory to explore the ecology, behaviour and parasitic potential of O. rudnevi in Mediterranean oak open woodlands.