Western Pine Shoot Borer (Lepidoptera: Olethreutidae) Response to Site Preparation in Ponderosa Pine Plantations

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The effects of six site preparation treatments on western pine shoot borer, Eucosma sonomana Kearfott, infestations were compared during the fifth through the eighth growing seasons after planting at three sites in southcentral Oregon. Treatments included a logged-only control, ripping, disking, brush-blading, herbicide spraying, and herbicide spraying followed by disking. Treatments that produced the greatest reduction in competing vegetation resulted in the best pine growth but also in the highest levels of E. sonomana infestation. Trees that were attacked by E. sonomana were significantly taller at the beginning of the growing season than trees that remained uninfested. The effect of E. sonomana infestation on height growth of ponderosa pines, Pinus ponderosa Douglas ex Laws., showed a significant interaction with total height of the pine trees at the beginning of the growing season; infested trees grew proportionally less than uninfested trees as total height increased. The results of this study illustrate the importance of incorporating pest management considerations into overall forest management plans.

Document Type: Research Article

Publication date: April 1, 1989

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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