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Insect and Disease Diagnostic Key

This section includes pest and disease identification keys for individual fruit and vegetable crops. The key asks a series of questions and walks you step by step through the diagnostic process.

Pest and disease symptoms can vary greatly. Symptom expression for your particular crop may not match those demonstrated here. Consult your local extension agent for further assistance. For additional crop disease information, contact the University of Minnesota Crop Disease Clinic at: 612-625-1275.

Additional background information on insect damage, types of plant diseases, and preventing problems can be found in the section titled An Introduction to Pest and Disease Problems, which is located Here.

Asparagus
Beans
Blueberries
Cabbage, Broccoli, & Cauliflower
Carrots
Cucurbits (cucumber, melon, squash, and pumpkin)
Grapes
Onions
Parsnips
Peas
Peppers
Potatoes
Radishes
Raspberries
Spinach
Strawberries
Sweet Corn
Tomatoes

This site was developed through a partnership with the University of Minnesota Extension Service, the USDA Risk Management Agency, and The Minnesota Fruit and Vegetable Growers Association.

Thanks to Janna Beckerman and William Hutchison for contributing the disease and insect photos respectively.