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- Susceptibility of ponderosa pine to western gall rust within the middle Columbia River system
- Ponderosa pine -- Disease and pest resistance -- Northwest, Pacific ;<br> Tree rusts -- Northwest, Pacific ;<br> Rust fungi -- Northwest, Pacific.
- esponse to artificial inoculation by western gall rust. The northern inland populations were highly resistant. Only 28 percent of the seedlings had galls 39 months after inoculation. Three major resistant reactions were observed: no symptoms,...
- U.S. Forest Service Research Legacy Documents