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A pilot study in three northern Minnesota spruce-fir stands showed that as cutting intensity increased, defoliation by the spruce budworm decreased. Commercial clear cutting reduced defoliation most.
Author(s): Harold O. Batzer
Keywords: budworm, clear cutting, spruce-fir
Source: Research Note NC-36. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station
Year: 1967
Jack pine foliage infested with jack-pine budworm egg masses was examined under two kinds of light -- black light and a combination of natural and fluorescent light. Black light significantly increased the accuracy of count but not the efficiency of examination.
Author(s): Daniel T. Jennings
Keywords: black light, budworm, jack-pine
Source: Research Note NC-56. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station
Year: 1968
Contains 46 papers and abstracts presented at a meeting sponsored by the International Union of Forestry Research Organizations (IUFRO) Working Party S7.03-06, "Integrated Management of Forest Defoliating Insects," and Working Party S7.03.07, "Population Dynamics of Forest Insects."
Author(s): Michael L. McManus, Andrew M. Liebhold, [eds.]
Keywords: forest insect, defoliator, integrated management, population dynamics, ecology, gypsy moth, bark beetle, budworm, moth
Source: 2002 September 1-5; Krakow, Poland. Gen. Tech . Rep. NE-311. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northeastern Research Station. 178 p.
Year: 2003
Forest composition and structure on the eastern slope of the Cascade Mountains have been influenced by decades of fire exclusion. Multilayered canopies and high numbers of shade-tolerant true fir trees interact with western spruce budworm to alter forest structure and to affect potential fire behavior…
Author(s): S. Hummel, J.K. Agee
Keywords: Western spruce, budworm
Source: Northwest Science. 77(2): 159-169
Year: 2003
Cumulative and annual mortality of red spruce (Picea rubens Sarg.) and balsam fir [Abies balsamea (L) Mill.] were examined over a 10 yr period to follow the mortality patterns in unprotected spruce-fir forests in northern Maine. Different mortality patterns were determined based on stand…
Author(s): Dale S. Solomon, Lianjun Zhang, Thomas B. Brann, David S. Larrick
Keywords: budworm, defoliation, tree mortality, red spruce, balsam fir
Source: Northern Journal of Applied Forestry. 20(4): 148-153
Year: 2003