Mortality and top killing of spruce-fir caused by repeated budworm defoliation
By: D.C. Schmiege
Contributors: Lake States Forest Experiment Station (Saint Paul, Minn.)
Series: Technical notes / Lake States Forest Experiment Station -- no. 597; Technical notes (Lake States Forest Experiment Station (Saint Paul, Minn.)) -- no. 597.
Published: 1961
Language: eng
Subjects: Abies; Spruce budworm; Choristoneura fumiferana; Picea; Forest insects; Spruce; Mortality; Diseases and pests
Notes: Caption title.

"January, 1961."