Field Diagnostics: Recognizing Common Leaf Diseases on Hemp

Leaf diseases are often prevalent in field hemp. Diseases such as anthracnose, Bipolaris leaf spot, Botrytis gray mold, Cercospora leaf spot, powdery mildew, and Septoria leaf spot can all cause defoliation in indoor and outdoor grown cannabis. This presentation focuses on the most common leaf diseases of field hemp in Kentucky. See below for additional resources for greenhouse and indoor cannabis production.

The videos in this series were generated for the University of Kentucky 2020 Virtual Hemp Field Day, which was held on December 8 &9 9, 2020. Specialists from the University of Kentucky and the Kentucky Department of Agriculture have provided this production and pest management information for hemp producers in Kentucky and surrounding area. Information in this series was accurate at the time of recording, however, information may have changed. Growers should work with their county agents for the most up-to-date and the most accurate information.

Dr. Nicole Gauthier is an Extension professor at the University of Kentucky, Department of Plant Pathology. Her focus is disease management for specialty crops, including hemp. Additional resources can be found at:
• UK Dept of Plant Pathology (fact sheets, research reports) - https://plantpathology.ca.uky.edu/ext...
• Multistate Collaborative Website (incl image database) – https://blogs.cornell.edu/s1084hemp/
• YouTube -    / nicolegauthier  
• Facebook -   / kyplantdisease  
• Twitter/X - https://twitter.com/kyplantdisease?la...