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First Report of Target Spot Caused by Corynespora cassiicola in Louisiana Cotton

T. Price, R. Singh, and D. Fromme

December 2015


During the summer of 2014, Louisiana cotton producers in 13 parishes experienced an outbreak of what appeared to be target spot caused by Corynespora cassiicola. Defoliation due to the suspected disease was observed up to 75% in isolated areas. An isolate of the suspected causal agent was obtained, and Koch’s postulates were subsequently completed. This is the first report of this disease in Louisiana.


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