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Project Noah Nature School
I observed this orange, powdery substance on the leaves of several invasive blackberry shrubs along the Sacramento River in Redding. I also observed a similar substance on the leaves of a wild rose near Burney Falls and on the stems of a pine in Whiskeytown National Recreation Area. I believe this may be Phragmidium violaceum (Schultz) but am not certain.
Spotted on Jun 4, 2012
Submitted on Jul 5, 2012
