Question of the Week: 2,4-D

Last week the question was:  What is wrong with these cotton leaves?


These leaves are showing symptoms of 2,4-D damage.  Cotton is extremely sensitive to 2,4-D.  Damage can occur when sprayers are not cleaned out well, by wind drift, or by volatilization in hot weather.  2,4-D resistance traits have been developed and were available in several varieties this season, though 2,4-D was not labeled for use in cotton (it’s expected to be labeled for the 2016 season).  This trait (called Enlist) won’t be available in all cotton varieties, so 2,4-D damage is not a thing of the past.


Here is this week’s question:  What happened to this tobacco hornworm?


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