Identification and Management of Bacterial Blight of Cotton

| 2017
  • SOUTHEAST

The prevalence of Bacterial Blight caused by (Xanthomonas citri pv. malvacearum) (Xcm)  has increased in recent years. Isolates from GA, MS, and TX are predominantly Xcm race is 18. Thus the resistance-gene package developed by the Universities of OK and TX A&M remains effective. The apparent problem is that the percent of acres planted to susceptible varieties has increased. Moreover, relating field histories and patterns of early infection to disease incidence suggests that contaminated seed may be a source in certain instances. Mississippi State University and Cotton Incorporated are developing a qPCR test for seed. The method is currently being validated on field infected material collected in 2018.