28 May 2013

Boll Rots and Other Disorders

Hardlock in cotton results in an unopened bur and a tight, almost mummy-like appearance of individual cotton locks. While a normal cotton bur opens and the cotton develops a fluffy appearance, hardlock prevents the bur from opening and the cotton from fluffing normally. Hardlock may be associated with, or confused with, damage from Fusarium, Phytophthora, Nigrospora, and other fungal and bacterial pathogens. Boll injury from stinkbugs and plant bugs may also be factors in boll rot and hard lock disorders. Research is continuing to gain more understanding of this condition and its relationship to crop nutrition, insect injury, plant diseases, and environmental conditions.

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