Dying of twigs and branches of old trees, but also of younger plants, which have been physiologically weakened; underneath the bark star-shaped galleries, mating chamber deeply inserted in the springwood, larval tunnels wide (by contrast to those of the Six-toothed Spruce bark beetle)
Affected tree species
Douglas fir; Fir; Larch; Pine; Spruce;
Especially in afforestations attacking healthy trees after mass propagation
Curative measures Hygienic measures: above all in afforestations quick removal of infested plants; further information (in German): bark beetle-homepage.
Pityophthorus pityographus: feeding pattern
Pityophthorus pityographus: beetle
Pityophthorus pityographus: beetle in feeding tunnel