Biology: Larvae hatch in May(June),
enter shoots from the tip, and mine down through the growing point
into the gall chamber formed by thickened, stunted internodes. Only
one larva is found per shoot. End of July/August full fed larvae turn
head upwards in the gall chamber and hibernate there. Pupation happens
in April and adults emerge during May/June. Flies live for about two
weeks and lay eggs on shoot tips and leaves.
Description: Mature larvae 8-12 mm
long, body stout, light yellowish (picture 7), feeding in gall internodes
below growing point; pupae same shape as larvae, brown to yellow-brown;
adults dark, 5.5-7.5 mm (picture 36).
Feeding pattern/damage: Larvae induce
shortening and thickening of new developing internodes. The resulting
gall consists usually of 10-13 shortened and strongly lignified internodes
(picture 22 and 5). After July the growing point is always eaten through.
Distribution: Europe, (North America
introduced, probably not established)
1967; Chvala et al., 1974
Pic. 7: Larva of Lipara lucens feeding in shortened internodes
below growing point
Pic. 36: Adult Lipara lucens
Pic. 22/5: Gall of Lipara lucens without and with leaves