The University of Tennessee Cotton Agronomy Program provides an unbiased evaluation of experimental and commercial varieties available for production in Tennessee each year. The 2018 program consisted of two types of trials: Official Variety Trials (OVTs), and the County Standard Trials (CSTs). The OVTs are small plot, replicated variety trials located on producer farms or on AgResearch and Education Centers and are composed of experimental and commercial varieties. The CSTs are large plot variety trials located throughout the Western and Central regions of Tennessee and are only composed of major commercial cultivars. Seven OVTs and thirteen CSTs were conducted during the 2018 season.  Information reported from these trials within this report includes yield, fiber quality, and Commodity Credit Corporation (CCC) Loan values.  Additionally, selected in-season measurements of growth and development are also reported from the OVTs. A glossary is included at the end of this report to define technical terms and abbreviations used.

This publication is intended to help cotton producers identify varieties that are high yielding, are stable in yield performance across years, and produce high quality fiber; therein, included information should provide those in the seed industry, crop consultants, and the UT Extension service insight into varietal adaptation of all tested varieties to Tennessee field environments.

Tyson Raper

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