EDITOR: For years we have been trying to figure out what this was throughout the park. They say a fungicide will kill it. Anybody know the name of it?
KOIN News 6 for Local News Weather and Sports, Portland, OR; KOIN.com - Tree Disease On Oregon coast: "Tree Disease On Oregon coast
ASTORIA, Ore. - Oregon coastal forests are seeing a resurgence in Swiss needle cast disease, a fungus that kills the needles on Douglas fir trees.
It doesn't kill trees but reduces growth rates by up to half.
Aerial surveys show more than 338-thousand acres infected by the disease - almost double the 2004 total.
The fungus thrives in warm, wet conditions and turns needles yellow before the tree 'casts' them off.
Foresters say they can do little to contain the disease. They say a fungicide would do it but that it would be expensive and risky to spray it over the hundreds of thousands of infected acres.
The disease tends not to spread inland more than about 18 miles because of weather conditions.
The surveys show that Tillamook County has the most extensive damage."
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