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ET™: Finding a Place at Home in West Central Texas Cotton

Billy E. Warrick

ABSTRACT

ET™ (pyraflufen-ethyl), was tested as ET-751 prior to the 2003 growing season, is a herbicidal harvest aid being marketed by Nichino America, Inc. In cotton, ET™ has been tested as a harvest-aid product since 2001 in West Central Texas. The information summarized in this report is from plots established in 2001, 2002 and 2003. ET™ was applied with a self-propelled ground sprayer to small replicated test plots of furrow irrigated cotton. In these small plots ET™ was equal in its level of leaf defoliation to any currently labeled harvest aid (as of December, 2003). Leaf drop continued slowly even when night temperatures fell in the 50 to 60 degrees Fahrenheit range. The defoliation of the cotton plant was slowed when night temperatures dropped below 60 Fahrenheit. When ET™ is used at rates above the 1.4 ounces per acre rate, leaf desiccation is significantly higher for seven to fourteen days, however, the percent of desiccation falls within an acceptable range of less than 20 percent by fourteen days after treatment. When ET™ is applied at the 1.4 to 2.0 ounce per acre rate the level of leaf desiccation was no different by harvest time than other harvest aids tested. ET™ can provide some regrowth suppression if adequate coverage with the harvest aid is achieved.





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Document last modified 04/27/04