Original Source:Elizabeth Little, Extension Specialist, Department of Plant Pathology, University of Georgia
August 27, 2012Many areas in Georgia are experiencing warm, humid weather with frequent thunderstorms this month. This is the perfect weather for fungal leaf spot development in the landscape. Most leaf spots are benign and will not damage the plant. Cercospora Leaf Spot of Hydrangea is an example of a leaf spot disease that commonly occurs during prolonged wet weather or under sprinkler irrigation. As with most leaf spots in the landscape, chemical treatment is rarely needed. Some leaf spotting and leaf drop will not the harm the plant.