The University of Georgia works to provide producers with information on performance of cotton varieties through two programs. The state-wide variety testing program conducts the Official Variety Trial or OVT program to evaluate yield potential of a large number of new and commercial varieties in a selected number of irrigated and dryland small plot trials. Preliminary 2019 OVT results can be found at https://swvt.uga.edu/summer-crops/cotton.html. The UGA On-Farm Cotton Variety Evaluation Program (OFT) compares the performance of a much smaller set of varieties, which have been proven to have a fit in Georgia, in a significantly larger number of locations in large-plot, replicated strip-trials. We thank the many County Agents and cooperating growers who participated in the on-farm program.
Both programs provide significant clues to which varieties will likely be the best performers in 2020. Data from the UGA On-Farm Cotton Variety Evaluation Program provides information not only on yield potential, which is one of the most important factors in choosing varieties, but consistency and stability of performance across varying yield environments. Since the inception of this program, it has become clear that stability and consistency of performance in the past is one of the best ways to predict future performance. All varieties evaluated in the on-farm trials have shown the potential to do well in Georgia and this program is intended to compare the “best of the best” choices for Georgia producers.
In 2019, a total of 11 varieties from five seed companies were evaluated in the 2019 UGA OFT program. Varieties were evaluated in a total of 25 on-farm strip trials, 13 irrigated and 12 dryland locations. Trials were planted, managed, and harvested by cooperating growers. The trials were conducted across the Coastal Plain of Georgia, where the vast majority of cotton is produced. Yield environments or trial averages across locations ranged from a low of 519 lbs. lint/acre to a high of 1,615 lbs. lint/acre. Commercially harvested seedcotton samples were collected and taken to the UGA Microgin to determine lint percentage and ultimately fiber quality. We are continuing to collect and summarize fiber quality data. Once completed a final report of the UGA OFT data will be posted on http://www.ugacotton.com/. Contact your County Agent for additional information on variety performance.
|2019 On-Farm Cotton Variety Evaluation||All Locations Average||LSD (p=0.1)||% Above Trial Average||% Among Top 3|
|DG 3615 B3XF||1,206||a||68||60|
|DP 1646 B2XF||1,185||ab||76||52|
|PHY PX3B07 W3FE||1,170||ab||64||36|
|ST 5471 GLTP||1,165||ab||64||24|
|DP 1851 B3XF||1,161||bc||68||32|
|DP 1840 B3XF||1,140||bcd||48||40|
|ST 5600 B2XF||1,120||cde||44||16|
|PHY PX5D28B W3FE||1,119||cde||36||16|
|NG 5711 B3XF||1,086||e||28||8|
|NG 3930 B3XF||1,016||f||8||0|
This study was conducted by UGA Extension Cotton Specialists Jared Whitaker and Mark Freeman. This article was written by UGA Extension Entomologist Phillip Roberts.