Worms in Corn-Second Request

Asked September 6, 2019, 12:28 PM EDT

How can I minimize worms in corn crop?

Prince George's County Maryland field crops

1 Response

I assume you are talking about ear worms in sweet corn. Hope this helps.

Prevention/Control

  • Select sweet corn cultivars with ear tips tightly covered by husks.
  • Bacillus thuringiensis (Bt), an “organic” pesticide, can be used on early larval stages.
  • Mineral oil dropped onto corn ear tip 5-7 days after silking prevents egg laying.
  • After silk browns, rubber band ear tips to prevent larvae burrowing into kernels.
  • Trichogramma wasps, a naturally occurring native enemy, will parasitize larvae.
  • Spring and fall tilling destroys pupae.
  • Early crops suffer less infestation than late season crops.
  • Plant extra to compensate for damage and simply cut out damaged portions.

https://extension.umd.edu/hgic/topics/corn-earworm-vegetables