This guide is an overview of cotton diseases that may impact cotton crops throughout the growing season.
Scouting for Cotton Diseases
Managing Mid-to Late-season Diseases in Cotton
Cotton should be scouted for foliar, wilt, root, and boll diseases from fruiting to defoliation.
Management options can be limited for controlling mid- to late-season cotton diseases.
Minimizing cotton stress early in the season can help reduce the severity of diseases and help maintain cotton yield potential.
Mid- to Late-season Stem, Root, and Boll Diseases in Cotton
Fusarium and Verticillium wilts are soil-borne pathogens that can be difficult to manage. Symptomology of the two diseases are similar, making diagnosis difficult. Stem discoloration is typically more evenly distributed with Verticillium wilt. For confirmation of a wilt disease, the bottom stems of cotton plants may be sent to a diagnostic lab. Refer to your local university extension service for sampling procedures.
Mid- to Late-season Cotton Leaf Diseases
Mid- to late-season foliar cotton diseases occur when a crop is under stress. Stress can come from all directions—too dry, too wet, insects, storms, fertility, and others all play a part in the health of a crop. Mitigating conditions conducive for disease development and understanding if and when a fungicide application is necessary is important to help maximize yield potential.