Corn Insects

C.O.R.N. Newsletter Articles

  1. Fall Army Worm in Late Corn
    Author(s): Andy Michel , Author(s): Kelley Tilmon , Author(s): Curtis Young, CCA

    We have all experienced the massive damage that fall armyworms did on our forage crops and turf.  Keep in mind that fall armyworm can also damage corn.  We have found late-stage caterpillars feeding on corn that was planted on May 25 and on June 23rd.  The good news is that corn with above-ground Bt offers protection against fall armyworm.  The bad news is that Bt resistance has occurred in other states to our south (which is where our fall armyworms likely came from).

    Issue: 2021-30
  2. Male Western Corn Rootworm
    Author(s): Andy Michel , Author(s): Kelley Tilmon , Author(s): Curtis Young, CCA , Author(s): Aaron Wilson

    Most of us remember a connection between fireflies and corn rootworm hatch. This connection may not be absolute and could have changed since we’re now using different production practices than in the past. Northern Corn Rootworm AdultWe also know a lot more about corn rootworm biology.  In Ohio, western corn rootworms are by far the most common (although you may see some northern corn rootworms).

    Issue: 2021-19
  3. Seedcorn maggots inside of damaged corn seed
    Author(s): Curtis Young, CCA

    Many livestock operations did not have much opportunity to spread manure this winter and into the spring.  Thus many may have pits and lagoons near full capacity and a great need to move that manure to fields as soon as possible.  As spring progresses, manure spreading and planting may occur in a short sequence that can set up prime conditions for seedcorn maggot infestations and injury resulting in poor stand establishment.  Factors that favor seedcorn maggot damage include the incorporation of either green material, such as cover crops or weeds, and/or manure, and cool and damp soil condi

    Issue: 2020-08
  4. Corn earworm
    Author(s): Kelley Tilmon , Author(s): Pierce Paul , Author(s): Andy Michel

    There have been recent reports of high corn earworm populations in certain grain corn fields.  Corn earworm is a pest with many hosts including corn, tomatoes and certain legumes.  In Ohio it is typically considered a pest of sweet corn rather than field corn, but this past week substantial populations have been found in certain field corn sites.

    Issue: 2019-27
  5. Author(s): Amy Raudenbush , Author(s): Kimberley Gault , Author(s): Mark Badertscher , Author(s): Lee Beers, CCA , Author(s): Amanda Bennett , Author(s): Bruce Clevenger, CCA , Author(s): Sam Custer , Author(s): Tom Dehaas , Author(s): Allen Gahler , Author(s): Jason Hartschuh, CCA , Author(s): Andrew Holden , Author(s): Stephanie Karhoff , Author(s): David Marrison , Author(s): Sarah Noggle , Author(s): Les Ober, CCA , Author(s): Eric Richer, CCA , Author(s): Garth Ruff , Author(s): Clint Schroeder , Author(s): Jeff Stachler , Author(s): Mike Sunderman , Author(s): Curtis Young, CCA , Author(s): Chris Zoller , Author(s): Andy Michel , Author(s): Kelley Tilmon

    Results from week five of The Ohio State University Western bean cutworm (WBC) monitoring network has resulted in an overall increase of moths captured across Ohio. Meaning, last week (July 22 – 28) marks our peak week in adult WBC flight to date. A total of 26 counties monitored 79 traps across Ohio and resulted in a 2842 WBC adults (up from 2001 total last week) and a statewide average of 36.0 moths/trap (up from 25.3 average last week) (Figure 1).

    Issue: 2019-24


  1. 01/2011

    Control of Insect Pests of Field Crops, Bulletin 545. Gives detailed information on pest control thresholds and insecticide options for management of insects in corn, soybean, wheat and alfalfa.

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