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Filtering by: Decade 1990-1999 Subject Christmas trees -- Diseases and pests -- Control -- Oregon

The biology and control of the Douglas-fir needle midge in Christmas trees

Creator:

Oregon State University. Extension Service, West, Kenneth John, DeAngelis, Jack D., and Simko, B. C. (Ben C.)

Abstract:

Published April 1991. 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:

Other
Biology and control of Douglas-fir needle midge in Christmas trees

Creator:

Oregon State University. Extension Service and DeAngelis, Jack D.

Abstract:

The Douglas-fir needle midge can be a very destructive pest of Douglas-fir. Infestation of new needles can be as high as 100 per-cent. Severe infestations can cause intolerable needle loss, and trees may take several years to recover. Needle loss is an especially serious problem in Christmas trees because of...

Resource Type:

Technical Report