Interest in ultra narrow cotton (UNR) has grown over the last year in North Carolina. Studies were conducted to evaluate growth and development of UNR compared to conventional cotton, thrips control, and planting dates.
In terms of growth and development, plant mapping data provides insight into the differences between UNR and conventional cotton. UNR cotton set a higher percentage of first position bolls. The percentage of vegetative bolls and number of vegetative branches for UNR was much less than conventional cotton. UNR plant height was less than conventional and the peak bloom occurred earlier than in conventional cotton. Basically UNR compared to conventional cotton seems to be earlier, shorter, more columnar, and set almost all first position bolls. Lint yield was not significantly different between UNR and conventional cotton however UNR cotton was harvested 12 days prior to conventional cotton.