Published August 1958. 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
The spruce budworm is an important enemy of the Douglas fir-true fir forests in Oregon. It can be successfully controlled by aerial spraying with DDT.
The influence of air temperature on spruce budworm growth, the growth of the host, and interrelationships between insect and host were studied on 15 areas...
Published August 1958. 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