Now that we are in the third month of the 2016 outbreak of fall armyworms, it has been necessary to treat some fields more than once. This
brings up several considerations: maximum use rates that are allowed for each pesticide per cutting and per year, retreatment intervals,
insecticide mode of action, and residual of the insecticide on the foliage. These are in addition to the usual issues of cost, availability, toxicity,
and whether a pesticide applicator permit is required. The following information may be useful in making treatment decisions. It is a good idea
to rotate modes of action throughout the season. If fall armyworms are detected early in the harvest cycle, it is a good idea to choose an
insecticide with a longer residual. Insecticides with the longest residuals on the foliage are methoxyfenozide (Intrepid), chlorantraniliprole
(Prevathon), and diflubenzuron (Dimilin 2L). For more information on fall armyworms, see the insect control section of alabamaforages.com.
The attached information sheet discusses several considerations involved in choosing an insecticide to control fall armyworms in pastures and hayfields.
Fall Armyworm Timely Information Sheet August 2016.pdf
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