The Douglas-fir needle midge can be a very destructive pest of Douglas-fir. Infestation of new needles can be as high as 100 percent. 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 the aesthetic value of these trees.
Organization |
Oregon State University Extension |
Publisher |
Oregon State University |
Published |
July, 1994 |
Material Type |
Written Material |