Target Spot of Cotton
Published: 08/25/2023
Target spot, caused by the fungus Corynespora cassiicola, occurs in all U.S. cotton-producing states but is more problematic in the Gulf-coastal region due to frequent rainfall and high humidity. Initial symptoms are brick-red spots that expand into tan to light brown centers with concentric rings. The disease primarily affects the lower canopy, leading to premature defoliation, and lesions can be observed on petioles, bracts, and bolls.
Target spot symptoms on cotton leaf.
Travis Faske.
Target spot defoliation.
Travis Faske
Effective management includes crop rotation, sanitation, selection of less susceptible cultivars, timely application of fungicides during bloom, and regulating excessive canopy growth.
Written and reviewed by Travis Faske, University of Arkansas; Tom Allen, Mississippi State University; Trey Price, Louisiana State University; and Terry Spurlock, University of Arkansas.
Target spot symptoms on cotton leaf. Image by Travis Faske.
Target spot defoliation. Image by Travis Faske.
Target spot defoliation. Image by Travis Faske.
Target spot symptoms on cotton leaves. Image by Travis Faske.
Target spot symptoms on cotton bract. Image by Travis Faske.
Gallery images courtesy Travis Faske.
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