Virginia Cotton: Orthene Time, Priorities with Approaching Dry Period

Poor Engenia control of large pigweed. Photo: University of Tennessee

Looks like we went into the refrigerator on Tuesday night and by Friday, its going to be full throttle Summertime.  There are several defining events for each cotton season that we can look back on as unique, and this year, one of those events is going to be this warm planting season and the high total heat accumulation through. 

Here are some areas to focus on for the rest of this week:

  • Full yield potential is expected from cotton that is planted this week and next week.
  • Thrips are here.  Consider the interaction between planting date, geographic location, and planting treatments to determine risk and priority (Check your email for specific recommendations.)
  • Rain chances will have a huge impact on planting depth for the 40% of the region that had less than an inch of rain this past weekend (details in email).
  • Weed control is going to require some thinking this year.  Valor did not last as long or was omitted.  Most preemergence up till now has worked very good.  However, I am seeing large ragweed and/or some palmer in a few fields.  There are several approaches that will work but the days of just using Roundup alone with the Orthene spray then coming back 2 or 3 weeks later and trying to clean up have past us.
  • Preemergence herbicides have had good activation so far, but going forward, they may not due to the lack of rain.  Forget Prowl.  The other materials will wait for a rain, but some weeds could come up before the next rain that need addressing.
  • Scorch Risk for this first thrips spray will be high in the high moisture areas, but a little bit lower where it is dry.

 


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