Dothistroma Needle Blight
Dothistroma needle blight is especially common on Austrian pines.
Types of Samples Needed for Diagnosis and Confirmation
Collect 3 to 5 twigs. For further information go to Woody Plants Sample Collection.
Signs and Symptoms
Affected needles develop brown bands, and the portion of the needle beyond the band dies. Trees are often affected from the bottom of the canopy working up.
See this article about Dothistroma needle blight.