Sexy Mouth Odour? Male Oral Gland Pheromone in the Grain Beetle Parasitoid Lariophagus distinguendus (Förster) (Hymenoptera: Pteromalidae)

Figure 2

Occurrence of the different mating behaviours ((a) wing fanning, (b) antennal stroking/head nodding, (c) receptivity signal of female, and (d) copulation) in naïve wasps. Red bars are couples with a male that developed on drugstore beetles (Db); blue bars refer to couples with males that developed on granary weevils (Gw). White parts of bars indicate couples, which did not show the specific behaviour. n.s.: not significant (overall comparisons using 4 × 2 -test).