Diseases of Spruce - Rhizosphaera Needle Cast

Symptoms of bottoms-up, inside out branch defoliation and dieback.

Black, dot-like spore producing structures in needle stomata. Yellow mottling and discoloration of infected older needles. Purplish-brown discoloration of infected older needles.

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URL: http//www.entomology.umn.edu/cues/dx/pk/rhizo.htm Last Revised: January 03, 2006 © The University of Minnesota The University of Minnesota is an equal opportunity educator and employer.