Disease Du Jour (June 13, 2011)

Todays’s disease photo comes courtesy of Gerald Roberts in Lafayette Parish. This is peach scab caused by the fungus Cladosporium carpophilum. The pathogen infects twigs and leaves as well as the fruit. Spots on the fruit are generally small (usually less than 1/8  inch in diameter), dark olive-green in color and are usually surrounded by a green to yellow halo. This disease is controlled primarily by the use of protectant  fungicide sprays, such as captan, beginning shortly after petal fall and continuing throughout the summer.

Scab on peach fruit.


About Don Ferrin

I am an associate professor and extension specialist in the Department of Plant Patholgy & Crop Physiology with the LSU AgCenter in Baton Rouge. I have statewide responsibility for issues and educational programs related to diseases of all horticultural crops in Louisiana.
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