Cranberry Plant Diseases (and other ailments):

• Fruit Rot
• Upright Dieback Disease:
  • Upright Dieback (pdf) (UMass)
  • Upright Dieback Disease (pdf) (versus uprights dying back for other reasons) (Univ. of Wisconsin-Madison)
  • Upright Dieback and Viscid Rot (pdf) (Phomopsis vaccinii is associated with both diseases) (Univ. of Wisconsin-Madison)
• Viruses
• False Blossom (not yet observed in our current Maine cranberry plantings)
• Red Leaf Spot (generally a minor disease)

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:

• Yellow Vine Syndrome
• Umbrella Bloom