Patterns of Occurrence and New Sampling Implications for Instar IV Western Spruce Budworm (Lepidoptera: Tortricidae)

Author： Torgersen Torolf R. Colbert J. J. Hosman Kevin P.

Publisher： Society of American Foresters

ISSN： 0015-749X

Source： Forest Science, Vol.39, Iss.3, 1993-08, pp. : 573-593

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