Fall armyworms (FAW) have been observed in non-Bt corn fields feeding in whorls. Preliminary data from a trial evaluating Double Pro and SmartStax Bt technologies suggest they are both very effective in suppressing foliage feeding FAW, more time to fully evaluate the trial will hopefully confirm early data. FAW moths deposit eggs on leaves. Newly hatched larvae begin to feed in the whorl. Larval feeding will cause the leaves to appear ragged, but insecticide treatments are seldom recommended. In extreme cases where treatment may be justified foliar applications of newer pesticides (Prevathon, Belt) have shown to provide suppression of whorl feeding FAW in a limited number of trials. Chemigation of a labeled insecticide active on FAW may be another management tactic to consider. As sorghum gets larger it will be very attractive to FAW; management options are limited since fewer insecticides are labeled for use in sorghum.
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| FAW feeding 4 days after hatch |
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