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Insect Resistance Management in Utah

 

Yield Gard™, Nature Gard™, Knock Out™

  • 20% Non-Bt Refuge, No hybrid restrictions
  • 20% Non-Bt Refuge, No Nature Gard™ or Knock Out™ hybrids allowed
  • 50% Non-Bt Refuge, No Nature Gard™ or Knock Out™ hybrids allowed
  • 50% Non-Bt Refuge, No hybrid restrictions
  • Refuge must be within 1/2 mile of Bt corn, 1/4 mile if you want to maintain
    option to spray refuge
  • Refuge can be treated if economically justified*. If refuge areas are to be treated for corn borers, microbial Bt foliar sprays are not to be used.

*Check with your seed rep, crop consultant, or extension agent to determine economic justification.

Last reviewed on September 17, 2003

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