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RELATIONSHIP BETWEEN CONE CROP SIZE AND CONE DAMAGE BY INSECTS IN RED PINE SEED-PRODUCTION AREAS

Published online by Cambridge University Press:  31 May 2012

William J. Mattson Jr.
William J. Mattson Jr.
Affiliation:
North Central Forest Experiment Station,1Forest Service, U.S. Department of Agriculture, St. Paul, Minnesota
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Abstract

Annual cone abundance and insect damage to cones are highly variable in red pine seed-production areas. Cone crop size fluctuates almost unpredictably from year to year, but the number of insect-attacked cones tends to increase annually unless limited by cone abundance. Sixty-six per cent of the variation in cone damage can be associated with variations in cone abundance. This information, coupled with the fact that red pine cone insects are almost entirely dependent on red pine cones for food, implies that crop size is highly important in regulating populations of cone insects. Insects will be most devastating in areas where crop size varies little from year to year.

Type
Articles
Information
The Canadian Entomologist , Volume 103 , Issue 4 , April 1971 , pp. 617 - 621
Copyright
Copyright © Entomological Society of Canada 1971

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References

Abrahamson, L. P. and Kraft, K. J.. 1965. A population study of the cone moth Laspeyresia toreuta Grote in Pinus banksiana stands. Ecology 46: 561–563.CrossRefGoogle Scholar
Graham, S. A. and Knight, F. B.. 1965. Principles of forest entomology. 417 pp. McGraw-Hill, New York.Google Scholar
Hairston, N. G., Smith, F. E., and Slobodkin, L. B.. 1960. Community structure, population control, and competition. Am. Nat. 94: 421–425.CrossRefGoogle Scholar
Hedlin, A. F. 1964. Results of a six-year plot study on Douglas-fir cone insect population fluctuations. Forest Sci. 10: 124–128.Google Scholar
Kraft, K. J. 1968. Ecology of the cone moth, Laspeyresia toreuta, in Pinus banksiana stands. Ann. ent. Soc. Am. 61: 1462–1465.CrossRefGoogle Scholar
Lester, D. T. 1963. Conelet production and floral initiation in red pine in relation to climate. Univ. Wis. For. Res. Note 100, 7 pp., illus.Google Scholar
Lyons, L. A. 1957. Insects affecting seed production in red pine. IV: Recognition and extent of damage to cones. Can. Ent. 89: 264–271.CrossRefGoogle Scholar
Mattson, W. J. 1968. The impact of insects on second-year cone crops in red pine seed-production areas. U.S. Dep. Agric. For. Serv. Res. Note NC-53, 2 pp. N. Cent. For. Exp. Stn, St. Paul, Minn.Google Scholar