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Differences Among Scotch Pine Varieties in Susceptibility to European Pine Sawfly

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Pinus sylvestris L. seedlots from 108 natural stands in Eurasia were tested in replicated test plantations in southern Michigan. During the fifth to seventh years four such plantations were attacked by European pine sawfly, [Neodiprion sertifer (Geoff.)]. The percentage of trees attacked varied from 0 to 6 for north Eurasian varieties, from 6 to 11 for south European varieties, and from 12 to 26 for central European varieties. The varietal differences were consistent between plantations and between years. In general the tallest varieties were attacked most. The most important exception was var. uralensis which was attacked much less than expected for its height growth. Compared with other varieties, it has wider needles, develops yellow color earlier in autumn, and has lower foliage concentrations of N, P, Na, Mg, Pe, and B. Field observations showed that larvae feeding on the resistant var. uralensis were 1/2 to 1 instar later in development than those on other varieties In an artificial feeding experiment, late-instar larvae showed no preference.

Document Type: Journal Article

Affiliations: Former Graduate Student, Michigan State University

Publication date: 1967-06-01

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  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 Impact Factor: 1.702
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    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
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