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Fall armyworms invade Stephenson County
armyworm
Fall Armyworms have damaged a Stephenson County alfalfa field. Patchy areas of light green and brown are often the first sign of infestation in an alfalfa field.
FREEPORT — The extended summer-like weather has given Fall armyworms the opportunity to continue marching north from the southern states. While it isn’t unusual to see them in the fall, conditions created the perfect storm for larger numbers to migrate north sooner than usual. University of Illinois Extension staff have been following the movement north over the last few months.