Diplodia Tip Blight of Two-Needle Pines

Diplodia tip blight is a common fungal disease of stressed conifers caused by the fungus Diplodia sapinea. Two-needled pines are most commonly infected, including Austrian or black pine, Mugo pine, ponderosa pine, red pine, and Scots pine. This publication presents common symptoms of Diplodia tip blight, its cause, strategies for reducing disease severity, and steps for accurately diagnosing this disease.