Thomas G. Chastain

Here’s a new article from our seed production research and extension team on irrigation and trinexapac-ethyl PGR effects on seed yield and yield components in red clover seed crops.  Field trials were conducted in the Willamette Valley over a 3-year period at OSU’s Hyslop Farm.  Trinexapac-ethyl is marketed around the world as Palisade, Moddus, and several generic products for lodging control and seed yield enhancement in cool-season grass seed crops and legume seed crops.

Floret bleaching in red clover, a common effect of TE PGR application (TG Chastain photo)
Floret bleaching in red clover, a common effect of trinexapac-ethyl PGR application (TG Chastain photo)

This article appears in the current issue of Agronomy Journal and can be found at the link below:

Anderson, N.P., T.G. Chastain, and C.J. Garbacik. 2016. Irrigation and trinexapac-ethyl effects on seed yield in first- and second-year red clover stands. Agron. J. 108:1116-1123.

Key findings of the article:

  • Irrigation strategically-timed to coincide with peak flowering consistently increased seed yield in red clover regardless of stand age.
  • Trinexapac-ethyl PGR increased seed yield in second-year red clover stands but not in first-year stands.
  • Irrigation and trinexapac-ethyl independently increase the yield of red clover seed crops but there were no interactions between the two.
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