Search articles from 1992 to the present.
Dothistroma Needle Blight
This article was published originally on 4/28/1995Many Austrian pines have been arriving in the Plant Disease Clinic showing symptoms of the disease Dothistroma needle blight. This fungal disease causes yellow to reddish-brown spots or bands on needles. Needles die from these banded areas to the tip. Diseased needles will eventually fall from the tree. Infection by the fungus usually occurs first on lower branches and spreads upward. For photos of disease symptoms, refer to Pm-1528 "Common Diseases of Conifers in Iowa".
To control Dothistroma needle blight:
Year of Publication:
IC-470(9) -- April 28, 1995