Population levels and biological mortality factors of spruce budworm, Choristoneura fumiferana (Clem.), in balsam fir, Abies balsamea (L.) Mill., stands in Newfoundland during 1982...

by Dobesberger, Erhard John
St. John's, Nfld. : Canadian Forestry Service, 1983.

Series: Information report (Newfoundland Forest Research Centre) ; N-X-218