Colletotrichum orbiculare


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Early signs of infection by this disease are water-soaked spots on the leaves and fruit. Leaf spots develop into brown, papery necrotic lesions that have lighter centers. Spots on fruit develop into sunken pits.

The disease organism survives in infected fields in crop residue, so crop rotation is important. Several genetically resistant varieties of cucumber and watermelon are available. A preventative spray program may be required for effective control.

The information given herein is for educational purposes only. Reference to commercial products or trade names is made with the understanding that no discrimination is intended and no endorsement by the Texas AgriLife Extension Service is implied.

Educational programs of the Texas AgriLife Extension Service are open to all people without regard to race, color, sex, disability, religion, age, or national origin.

Publication Revised July 2009

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