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The Old and the New: Two Needle Diseases of Spruce in North Dakota - F1680

Two Needle Diseases of Spruce in ND
 
Two Needle Diseases of Spruce in ND
Spruce (Picea spp.) is commonly planted in urban and rural landscapes in North Dakota and frequently suffers from needle loss. In general, healthy spruce retain four or more age classes of needles. Premature needle loss of spruce is the result of a variety of causes: improper planting, environmental stress, insect pests and disease. Rhizosphaera needle cast and stigmina needle cast are two of the most common diseases associated with spruce needle loss in North Dakota.

James Walla, Plant Pathologist, NDSU Department of Plant Pathology, Retired
Jared M. LeBoldus, Plant Pathologist, NDSU Department of Plant Pathology
Aaron Bergdahl, Forest Health Specialist, North Dakota Forest Service

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