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NC State Extension

Non-Pathogenic Disorders

Non-pathogenic disorders of cucurbits include air pollution (Ozone, Sulfur Dioxide, Nitrogen Dioxide), herbicide injury, nutritional disorders (blossom end rot, too much or too little manganese, and molybdenum deficiency), bitter fruit (caused by drought or choice of variety), Crown Blight of Melons (caused by root damage), Crown decline of Watermelon (from adverse growing conditions), Measles (spots on the fruit surface), moisture stress (drought and excess water), pollination problems, and temperature stress.

  • The NC State College of Agriculture and Life Science publication, Blossom-End Rot of Tomato, Pepper, and Watermelon discusses symptoms, causes, and controls for blossom end rot in watermelon and other vegetables. Continue Reading
  • Visit the Texas AgriLife Extension Texas Plant Disease Handbook for A Guide to the Identification of Common Cucurbit disorders. Continue Reading.