Abstract
Industrial hemp is Cannabis sativa that contains < 0.3% THC and can be legally grown with permits in Florida. The plant may be grown for flower, grain, or fiber production. Other than the lower THC levels, hemp is the same plant botanically as marijuana. Because this plant has long been on the Schedule 1 controlled substance list in the U.S. (United States), knowledge of pests and diseases is limited, and labelled control measures are almost non-existent. This publication provides information and general management recommendations for hemp diseases found in Florida. Management options are currently limited as there is a lack of resistant varieties and other management strategies for industrial hemp production.
References
Beckerman, J., H. Nisonson, N. Albright, and T. Creswell. 2017. “First Report of Pythium aphanidermatum Crown and Root Rot of Industrial Hemp in the United States.” Plant Disease 101 (6): 1038. https://doi.org/10.1094/PDIS-09-16-1249-PDN
Beckerman, J., J. Stone, G. Ruhl, and T. Creswell. 2018. “First Report of Pythium ultimum Crown and Root Rot of Industrial Hemp in the United States.” Plant Disease 102 (10): 2045. https://doi.org/10.1094/PDIS-12-17-1999-PDN
Garfinkel, A. R. 2020. “Three Botrytis Species Found Causing Gray Mold on Industrial Hemp (Cannabis sativa) in Oregon.” Plant Disease 104 (7): 2026. https://doi.org/10.1094/PDIS-01-20-0055-PDN
Gauthier, N., M. Rahnama, and K. Leonbergerr. 2021. “Septoria Leaf Spot of Field Hemp.” PPS-AG-H-01. University of Kentucky, Cooperative Extension Service. https://plantpathology.ca.uky.edu/files/ppfs-ag-h-01.pdf
Giles, G., E. J. Indermaur, J. L. Gonzalez-Giron, T. Q. Hermann, S. Shelnutt, J. Starr, K. Myers, et al. 2023. “First Report of Downy Mildew caused by Pseudoperonospora cannabina on Cannabis sativa in New York.” Plant Disease 107 (5): 1638. https://doi.org/10.1094/PDIS-08-22-1930-PDN
Gwinn, K. D., Z. Hansen, H. Kelly, and B. H. Ownley. 2022. “Diseases of Cannabis sativa Caused by Diverse Fusarium Species.” Frontiers in Agronomy 3. https://doi.org/10.3389/fagro.2021.796062
Hu, J. 2021. “First Report of Crown and Root Rot Caused by Pythium myriotylum on Hemp (Cannabis sativa) in Arizona.” Plant Disease 105 (9): 2736. https://doi.org/10.1094/PDIS-12-20-2712-PDN
Iriarte, F. B., J. Freeman, R. Yang, and M. Paret. 2021. “Industrial Hemp Pilot Program 2019-2020: Hemp Diseases in North Florida.” PowerPoint presentation, UF/IFAS North Florida Research and Education Center. https://plantpath.ifas.ufl.edu/u-scout/ewExternalFiles/HEMP-DISEASESFL_Iriarte_Paret.pdf
Marin, M. V., J. Coburn, J. Desaeger, and N. A. Peres. 2020. “First Report of Cercospora Leaf Spot Caused by Cercospora cf. flafellaris on Industrial Hemp in Florida.” Plant Disease 104 (5): 1536. https://doi.org/10.1094/PDIS-11-19-2287-PDN
Marin, M. V., N. -Y. Wang, J. Coburn, J. Desaeger, and N. A. Peres. 2020. “First Report of Curvularia pseudobrachyspora Causing Leaf Spot on Hemp (Cannabis sativa) in Florida.” Plant Disease 104 (12): 3262. https://doi.org/10.1094/PDIS-03-20-0546-PDN
Marin, M. V., N. -Y. Wang, J. Coburn, J. Desaeger, and N. A. Peres. 2021. “First Report of Diaporthe phaseolorum Causing Stem Canker of Hemp (Cannabis sativa).” Plant Disease 105 (7): 2018. https://doi.org/10.1094/PDIS-06-20-1174-PDN
McGehee, C. S., P. Apicella, R. Raudales, G. Berkowitz, Y. Ma, S. Durocher, and J. Lubell. 2019. “First Report of Root Rot and Wilt Caused by Pythium myriotylum on Hemp (Cannabis sativa) in the United States.” Plant Disease 103 (12): 3288. https://doi.org/10.1094/PDIS-11-18-2028-PDN
Pane, A., L. S. Cosentino, V. Copani, and S. O. Cacciola. 2007. “First Report of Southern Blight Caused by Sclerotium rolfsii on Hemp (Cannabis sativa) in Sicily and Southern Italy.” Plant Disease 91 (5): 636. https://doi.org/10.1094/PDIS-91-5-0636A
Pfeufer, E., C. Bradley, and N. Gautheir. 2018. “Southern Blight.” PPFS-GEN-16. University of Kentucky, Cooperative Extension Service. https://plantpathology.ca.uky.edu/files/ppfs-gen-16.pdf
Szarka, D., B. Amsden, J. Beale, E. Dixon, C. L. Schardl, and N. Gauthier. 2020. “First Report of Hemp Leaf Spot Caused by a Bipolaris Species on Hemp (Cannabis sativa) in Kentucky.” Plant Health Progress 21 (2): 82–84. https://doi.org/10.1094/PHP-01-20-0004-BR
Szarka D., L. Tymon, B. Amsden, E. Dixon, J. Judy, and N. Gauthier. 2019. “First Report of Powdery Mildew Caused by Golovinomyces spadiceus on Industrial Hemp (Cannabis Sativa) in Kentucky.” Plant Disease 103 (7): 1773. https://doi.org/10.1094/PDIS-01-19-0049-PDN
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