How to rate spruce-fir vulnerability to budworm in Minnesota.
Contributors: United States. State and Private Forestry. Northeastern Area.; North Central Forest Experiment Station (Saint Paul, Minn.)
Publisher: North Central Forest Experiment Station, Forest Service, U.S. Dept. of Agriculture; NA State & Private Forestry [distributor]
Published: 1980
Place of publication: St. Paul, MN; Broomall, PA
Language: eng
Subjects: Spruce budworm -- Minnesota.