University of Illinois Extension
University of Illinois Extension - Selecting Trees for Your Home
European Pine Shoot Moth
Rhyacionia buoliani
European pine shoot borer damage
Severity: 3 out of 5
Frequency: 1 out of 5
Symptoms: The mining of the needles by the newly hatched larvae cause the needles to die and turn brown during the summer. The caterpillar then tunnelsthe tips of the branches, terminal and laterals. Commonly, infested tips (candles) are curved like shepherd's crooks. Severe infestation may give the infected tree a reddish appearance. Severe infestation on small trees may cause their death. Drought and poor growing conditions seem to increase damage by this shoot moth.
Cycle: There is one generation per growing season. Eggs are laid at the base of new needles in late spring. After hatching, the insect mines the base of the needle. The insect tunnels into the shoot from the base of a needle. By the middle of summer, the insect has moved into the new buds. By late summer the insect stops feeding. European pine shoot moth overwinters as a pupa in the injured tissue
Management: Prune out and destroy the dead branch tips. If necessary use a recommended insecticide.
Associated trees: