Synanthedon formicaeformis (Esper, 1783)
on Populus, Salix
Like in most Sesiidae, the larva tunnels in wood that previously has been damaged, either by mechanical causes or by other wood-boring larvae, or in cankers caused by fungi or bacteria. Sometimes the larva makes a circular gallery around the branch, causing then a pear-shaped swelling. Often the exuvium remains for a long time protruding from the exit opening.
The occurrence on poplar probably is exceptional. Redfern & Shirley state that Salix viminalis is the primary host; this is not confirmed by other sources
Larva and pupa are extensively described by Bąkowski.
Bachelard (2014a), Bąkowski (2013b), Bąkowski, Celadyn, Hołowiński & Zajda (2011a), Bartsch (1992a), Bella, Bartsch & Laštůvka (2017a), Buhr (1965a) Ebert (ed, 1997a), Hellrigl (2010a), Houard (1908a), Kusdas & Reichl (eds, 1974a), Lambinon Schneider & Feitz (2012a), Predovnik (2018a), Redfern & Shirley (2011a).