Anthracnose on Cucurbits in Florida
Pollinating bee
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plant disease
fungal pathogen


How to Cite

Roberts, Pamela D., Gary Vallad, Shouan Zhang, Nicholas Dufault, and Mathews Paret. 2023. “Anthracnose on Cucurbits in Florida”. EDIS 2023 (3). Gainesville, FL.


Watermelon (Citrullus lanatus), cantaloupe or muskmelon (Cucumis melo), squash (Cucurbita pepo), bitter gourd (Momordica charantia), and cucumber (Cucumis sativa) are commonly grown  throughout Florida on both commercial farms and home gardens, while pumpkin (Cucurbita maxima) production is largely limited to north Florida.  Anthracnose on cucurbits, caused by the fungus Colletotrichum orbiculare, is a common disease that occurs worldwide and throughout Florida. While all cucurbits are susceptible to the disease, cucumber, cantaloupe, and watermelon are most frequently affected. This EDIS document provides information regarding the pathogen, disease cycle, diagnostics and symptoms, and an overview of management of this disease on cucucurbits.
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Damm, U.; P. F. Cannon, F. Liu, R. W. Barreto, E. Guatimosim, E., and P. W. Crous. 2013. “The Colletotrichum orbiculare Species Complex: Important Pathogens of Field Crops and Weeds.” Fungal Diversity 61: 29–59.

Guo, Z., C. X. Luo, H. J. Wu, B. Peng, B. S. Kang, L. M. Liu, M. Zhang, and Q. S. Gu. 2022. “Colletotrichum Species Associated with Anthracnose Disease of Watermelon (Citrullus lanatus) in China.” Journal of Fungi 8, no. 8: 790.

Keinath, A.P. 2017. “Anthracnose.” In Compendium of Cucurbit Diseases and Pests, edited by A.P. Keinath, W. M. Wintermantel, and T. A. Zitter, 54-55. Saint Paul: APS Press.

Monroe J. S., J. B. Santini, and R. Latin. 1997. “A Model Defining the Relationship between Temperature and Leaf Wetness and Infection of Watermelon by Colletotrichum Orbiculare.” Plant Disease 81 (7):739–742.

Thompson, D. C. and S. F. Jenkins. 1985. “Effect of Temperature, Moisture, and Cucumber Cultivar Resistance on Lesion Size Increase and Conidial Production by Colletotrichum lagenarium.” Phytopathology 75 (7):828–832.

UF/IFAS. U-scout. Cucurbit diseases.

Wasilwa, L. A., J. C. Correll, T. E. Morelock, and R. E. McNew. 1993. “Reexamination of Races of the Cucurbit Anthracnose Pathogen Colletotrichum orbiculare.” Phytopathology 83 (11):1190-1198.

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