Pennisetia hylaeiformis (Laspeyres, 1801)
The larva bores in the roots.
Rosaceae, narrowly monophagous
The larva live for two years; initially in the roots, later boring in a low branch. Pupation in a dead stem, 0-30 cm above the ground.
Larva and pupa are extensively described by Bąkowski.
The egg is deposited at the underside of a leaf; how the larva from there reaches the base of a branch is not clear. Perhaps the statement by Buhr is relevant that the larva also bores in the rachis of the leaf.
Aistleitner (2004a), Bachelard (2014a), Bąkowski (2013b), Bąkowski, Celadyn, Hołowiński & Zajda (2011a), Bartsch (1992a), Buhr (1965a), Ebert (ed., 1997a), Kusdas & Reichl (eds, 1974a), Laštůvka & Laštůvka (2001a), Predovnik (2018a), Roskam (2009a)m Sage (2005a).