Effect of Nitrogen on Fiber Quality of Cotton Varieties with Varying Reactions to Verticillium Wilt

Field trials were conducted  to determine the effect of increasing nitrogen levels on yield and fiber quality in fields with varying levels of Verticillium wilt pressure. Nitrogen levels in the soil profile (0-36 in) were determined prior to adminstering sidedress applications of nitrogen (0-250 lb/A). Verticillium dahliae populations were quantified within the corresonding profile. Growth and development of four cultivars (DP 0912, DP104, FM 9160 and NG 3348), disease incidence, lint yield and fiber quality data will be presented.