Plant Pathology Overview
In addition to parasitic nematodes, cotton is subject to endemic bacterial, fungal, and viral diseases and at least two recently introduced fungal diseases. Bacterial Blight was well controlled by host-plant resistance breeding done at Oklahoma State and Texas A&M Universities, but is resurging. Target Spot, a tropical disease of rubber, is now a significant disease of cotton in the South Atlantic and Gulf Coastal regions, and sporadically occurs in the Mid-South. Fusarium wilt is now represented in the U. S. by at least four races (one very likely introduced) and two new, unclassified biotypes in East. Some of these new FOV races and biotypes are root rotting fungi that attack cotton at or before the six leaf stage and have necessitated new protocols for production of disease-free seed. An outstanding success has been discovery and implementation of fungicidal control of Texas Root Rot, a soil-borne disease that otherwise defied a research solution for over 100 years.
In 2019 a complete genome of Cotton Leafroll Dwarf Virus (CLRDV) was described from isolates collected in three Alabama counties.
A single-stranded RNA virus has been detected and is infecting cotton in at least six southeastern U.S. states.
Cotton Incorporated, Texas A&M University, Mississippi State University, University of Arkansas, Texas A&M, University of Arkansas, and Texas A&M Agrilife Research – April 5, 2016
Cotton Incorporated, Auburn University, and the University of Georgia, September 12-13, 2012.
Bacterial Blight, also called Angular Leaf Spot, is a disease caused by the bacterium,
Common diseases with symptoms and disease management methods.
Site-Specific Management of Cotton Root Rot Using Airborne and Satellite Imagery and Variable Rate Technology
Cotton root rot, caused by the soilborne fungus Phymatotrichopsis omnivora, is a destructive disease
This disease only occurs in the southwestern United States and several northern states of Mexico