White to tan larvae with brown spots
and dark head, up to 1" long, overwinter in corn stubble.
They like all types of corn, especially sweet corn.
First signs are “shotgun” holes in the whorl (the funnel-
like new growth). Shortly after, borers move into
the stalk or ears and frequently leave “sawdust”
around borer holes.
To prevent damage to stalks and ears, use
spinosad- or Bt-containing products. Thoroughly
spray or dust ears and base of leaves every 7-10 days.
It is important to keep 100% coverage on leaves and
ears to get borers before they tunnel into corn. We
recommend Bull’s-Eye™ Bioinsecticide and Green
Step Caterpillar Control.