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Resistance to Azoxystrobin in the Gummy Stem Blight Pathogen Documented in Georgia

K. L. Stevenson, D. B. Langston, Jr., and K. W. Seebold

December 2004


Gummy stem blight is the most destructive disease of watermelon in many watermelon producing areas of the U.S. Azoxystrobin has been used for its control in Georgia since 1998. To determine how widespread the problem of resistance of gummy stem blight to azoxystrobin is in Georgia, extensive surveys of watermelon and muskmelon fields and transplant houses were conducted. The authors advise Georgia melon growers to use alternative, chemically unrelated fungicides for gummy stem blight control.


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