Predators of the spruce budworm.
Contributors: United States. Cooperative State Research Service.; Canada/United States Spruce Budworms Program.
Series: Spruce budworms handbook; Agriculture handbook -- no. 644.; Agriculture handbook (United States. Dept. of Agriculture) -- no. 644.
Publisher: U.S. Dept. of Agriculture, Forest Service, Cooperative State Research Service
Published: 1986
Place of publication: [Washington, D.C.?]
Language: eng
Number of pages: 77
Subjects: Spruce budworm -- Control -- United States.; Western spruce budworm -- Control -- United States.; Predation (Biology)
Notes: Cover title.

"CANUSA, Canada United States Spruce Budworms Program"--T.p. verso.

Shipping list no.: 86-316-P.

"November 1985"--T.p. verso.

Bibliography: p. 62-77.