Management of Gummy Stem Blight (Black Rot) on Cucurbits in Florida
Sea lavender in bloom. Figure 7 from Sea Lavender (Heliotropium gnaphalodes L.): Identification and Uses: ENH1299/EP563


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How to Cite

Paret, Mathews L., Nicholas S. Dufault, Mason Newark, and Joshua H. Freeman. (2011) 2018. “Management of Gummy Stem Blight (Black Rot) on Cucurbits in Florida: PP280, rev.8/2018”. EDIS 2018 (4). Gainesville, FL.


Gummy stem blight (GSB) is a major disease of many cucurbits, including watermelon, cantaloupe, cucumber, pumpkin, squash, muskmelon, and other melons. The disease is also known as black rot due to its characteristic appearance on infected fruits. Learn the symptoms, causal agent and disease spread, and fungicides labeled for use in Florida. Updated August 2018
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Ellis, M. B., and J. P. Ellis. 1985. Microfungi on Land Plants: An Identification Handbook. New York: Macmillan.

Dufault[MP1] , N.S., and M.L. Paret. 2014. Watermelon spray guide for Florida. UF/IFAS.

Freeman[MP2] , J.H, E.J. McAvoy, L. Zotarelli, M. Ozores-Hampton, P. Dittmar, M.L. Paret, S.E. Webb, S.M. Olson. 2014. “Cucurbit Production”, In: Vegetable production Handbook for Florida, edited by G.E. Vallad, J.H. Freeman and P. Dittmar

Sitterly, W. R., and A. P. Keinath. 1996. "Gummy Stem Blight." In Compendium of Cucurbit Diseases, edited by T. A. Zitter, D. L. Hopkins, and C. E. Thomas, 27-28. St. Paul, MN: American Phytopathological Society.

Zitter, T.A. 1992. Gummy Stem Blight. Vegetable MD Online Fact Sheet. Ithaca, NY: Cornell University.

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