Abstract
A soil-inhabiting species of Collembola, Onychiurs armatus (Tullb.), locates its food source, hyphomycetous fungi, by volatile compounds released from the mycelium. Attractivity was ranked based on the odour of the fungal species, represented by compounds in the range C 5-C 18 and typically released in olfactometer experiments at a rate of 250 pg h −1 from a 175 mm 2 fungal patch representing about 400 μg mycelium. Among fungi grown in agar Verticillium bulbillosum was most attractive; the preference of O. armatus switched to other species, however, when these were cultured in soil.
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