Fig. 1

Olfactory structures in D. suzukii viewed under SEM. An adult head with antenna and maxillary palp, highlighted in the insets. a Magnified antenna (b) and a maxillary palp (c). Palps have only one type of multiporous basiconic sensillum type (d). Antennal surface shows: long pointed trichoid sensillum (white arrow) and distinct coeloconic (arrow head) (e); multiporous basiconic sensilla (black arrow points to the large basiconic and short basiconic are indicated by white arrow head) (f). Scale bar is 200 μM in (a), 50 μM in (b) and (c); 5 μM for (d), (e) and (f)