Cranberry Plant Diseases (and other ailments):

photo of three Maine cranberries and one of them is discolored (orange) due to fruit rot infection
C. ArmstrongTwo healthy or at least asymptomatic cranberries with one that has been infected by cranberry fruit rot (topmost/orange berry). Late August, 2009.

Note: For plant disease diagnostic assistance, you can visit our University of Maine Cooperative Extension Plant Disease Diagnostic Lab, where you’ll find a form and instructions for submitting samples to us.

Some Abnormal Physiological Conditions:

cranberries with hail damage located in Columbia Falls, Maine
Cranberries Damaged by Hail – August 15th, 2011 (Columbia Falls, Maine); hail damage is sometimes mistaken for fruit rot.