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Creator:: Ritcher, Paul O.
Abstract:: Published April 1966. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Resource Type:: Technical Report
Full Text:: on the biological control of several important forest insects. Contents Insect Parasites Insect

Creator:: Poonyathawon, Panya
Abstract:: The purpose of this study was to determine the present status of introduced parasites of the omnivorous leaf tier, Cnephasia longana (Haworth) in Oregon. The omnivorous leaf tier is native to Europe. It was introduced into North America around 1929 and became a serious pest of economic crops such as...
Resource Type:: Masters Thesis
Full Text:: biological control agent in regulating omnivorous leaf tier population in Western Oregon. Insect

Creator:: Buffam, Paul Edwin
Abstract:: The balsam woolly aphid (Adelges piceae (Ratz)), an European pest of conifers, was first discovered in the Pacific Northwest shortly after 1930. Control measures of a chemical, silvicultural, or biological nature have been proposed. However, present control methods are either too costly or do not result in satisfactory control of...
Resource Type:: Masters Thesis

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