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Effects of Southwestern Pine Tip Moth and Vegetation Competition on Ponderosa Pine Growth

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The effects of southwestern pine tip moth Rhyacionia neomexicana (Dyar) and vegetation competition on ponderosa pine Pinus ponderosa (Doug. ex Laws) growth was studied in northern Arizona. Tip moth attack rates varied significantly among three sites. Weeding had little effect on attack rates but increased tree survival by 17%, height growth by 96%, and diameter growth by 83%. Insectidde treatment for tip moth control increased height growth 49% and diameter growth only 12%. High tree mortality rates in insecticide treated plots suggest a possible phytotoxic effect of the insecticide. Tree growth declined as tip moth attacks increased. Height growth was further reduced with each added year of tip moth attack. Diameter growth was less affected by multiple years of attack. For. Sci. 38(1):173-186.
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Keywords: Rhyacionia neomexicana; growth impact; vegetation competition

Document Type: Journal Article

Affiliations: Professor, Northern Arizona University, School of Forestry, Box 4098, Flagstaff, AZ 86011

Publication date: 1992-02-01

More about this publication?
  • 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.

    2016 Impact Factor: 1.782 (Rank 17/64 in forestry)

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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