Plant Disease Diagnostics

Built by UMaine Cooperative Extension, this short course blends approachable science with field-tested tips you can use right away in gardens, greenhouses, or production settings. If you want a clear, practical foundation in plant diagnostics, so you can tell normal variation from true problems and determine the issue the plant has, you’re in the right place.

In about 6-8 hours, you’ll learn how to read plant symptoms, tell abiotic from biotic issues, and work through a simple five-step diagnostic process that leads to confident next steps. You will also know when to sample or lab-test and where to find trusted, science-based resources.

In Maine, you'll also earn 6 pesticide applicator recertification credits!