Douglas-fir Tussock Moth

Lepidoptera: Lymantriidae Orgyia pseudotsugata (McDunnough)
 

defoliation 1 defoliation 2 defoliation 3 larva and cocoons
Defoliation Defoliation Defoliation Cocoons and larva on foliage
egg masses 1 egg masses 2 feeding on new foliage adult male
New egg masses Egg masses
Summerville, OR
July 1973
D. McComb		 Feeding on new foliage
July 1974
D. McComb		 Adult male
adult females early instar late instar 1 late instar 2
Adult females Larva Late-instar larva Late-instar larva
pupal case and egg mass defoliation on new foliage larval parasites larva killed by virus 1
Pupal case and egg mass Defoliation of new foliage Larval parasites:
Phobocampe pallipes
(Ichneumonidae)		 Larva killed by virus
August 1974
D. McComb
defoliation 4 defoliation 5 defoliation 6 evidence of past defoliation
Defoliation Heavy defoliation Defoliation Evidence of past defoliation
larval killed by virus 2 virus polyhedron webbing on tree top defoliation 7
Larva killed by virus
W.C. Guy		 Polyhedron single-rod virus (electron microscope) Webbing on tree top Defoliation
D.McComb

This webpage was reformatted on May 27, 2008.