Choose your crop and the symptom you see for the most likely causes and how to confirm each one. This suggests what to investigate — it is not a diagnosis. When in doubt, take a sample to your local Extension office.
Pick your crop and the symptom you see. You’ll get the most likely causes to investigate — not a diagnosis. When in doubt, take a sample to your local Extension office.
How it’s figured
Causes are ranked from common cultural problems (water, nutrients) toward pests and diseases, following standard Extension diagnostic practice: check the easy, fixable things first. Crop-specific entries reflect each crop’s well-documented key pests — cucumber beetles spreading bacterial wilt, squash vine borers, cabbageworms, and the like. This tool narrows the suspects; it can’t replace looking at the actual plant.