Insecticide Resistance Management
Growing biotech trait seed requires sound stewardship to preserve technology.
When you purchase Integra seed, your dealer will complete the required IRM paperwork for you.
Growers who choose to use seed with a Monsanto biotech trait seed must:
- Sign a Monsanto Technology Stewardship Agreement.
- Comply with Environmental Protection Agency (EPA) regulations by following Insect Resistance Management
(IRM) practices for specific biotech traits.
- Plant patented seed only to produce a single, commercial crop, without saving progeny seed for planting
a subsequent crop.
- Sell harvested corn with biotech traits not yet approved by the European Union to grain handlers that
confirm their acceptance, or use the corn on-farm.
- Failure to follow IRM guidelines and properly plant a refuge may result in the revocation of the
grower's Monsanto Technology Agreement and loss of access to insect-protected technologies.
- Do your part to ensure these technologies are preserved by following the IRM Stewardship guidelines.
- Planting a corn refuge maintains a population of corn borers that are not exposed to the B.t. protein.
- Plant at least 20 percent of your acres on each farm as a refuge. Corn planted in the refuge should
not contain B.t. technology to control corn borers.
- Plant the refuge within half a mile (one-quarter mile preferred) of the YieldGard®
Corn Borer or Herculex™ I corn.
- Refuge can be a block or in-field strip (four consecutive rows minimum, six rows preferred, in each strip.
- Planting a refuge is an EPA requirement for YieldGard® Corn Borer and Herculex® I corn.
- Plant up to 80 percent of your corn acres with YieldGard® Rootworm or YieldGard® Rootworm VT corn.
- Plant at least 20 percent of your acres on each farm as a corn refuge.
- Plant the refuge within or adjacent to the YieldGard® Rootworm or YieldGard® Rootworm VT fields.
- Refuge can be a block or in-field strip (six consecutive rows minimum, 12 rows preferred, in each strip).
- Planting a refuge is an EPA requirement for YieldGard® Rootworm corn and YieldGard® VT Rootworm
Growers have two choices when planning their refuge for YieldGard
® Plus or YieldGard
® VT Triple corn hybrids:
- Common refuge: Plant a refuge that will serve as the refuge for both corn borers and corn rootworms.
- Separate refuge: Plant a separate refuge for corn borers and a separate refuge for corn rootworms.
The corn rootworm refuge can be planted with YGCB, RR/YGCB, YGVT or conventional corn. The corn borer
refuge can be RR corn or conventional corn.
- Planting a refuge is an EPA requirement for YieldGard® Plus and YieldGard® VT Triple corn.
Refuge Configuration Options
in Corn Growing Areas
Key Refuge Requirements
in Corn Growing Areas
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| % Refuge |
20% non-B.t. corn borer protected corn |
20% non-B.t. rootworm protected corn |
20% non-B.t. corn
(common refuge plan only) |
| Configurations |
Separate field, block, perimeter, split planter |
Block, split planter, perimeter, adjacent field |
Block, split planter, perimeter, adjacent field |
| Refuge within a 1/2 mile (1/4 mile preferred) |
Refuge adjacent or within YieldGard Rootworm field |
Refuge adjacent to or within YieldGard Plus field |
| Consecutive Row Planted in Strips |
Split planter four rows |
Split planter four rows |
Split planter four rows |
YieldGard® Plus and YieldGard VT Triple®
Corn Separate Refuge Configuration
Options in Cotton - Growing Areas Only
YieldGard® Plus and YieldGard VT Triple®
Corn Seperate Refuge Configuration
Options in Corn (Non-Cotton) Growing
Areas Only
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CORN BORER REFUGE REQUIREMENTS
Must represent at least 20 percent of total corn acres (YieldGard Plus or YieldGard VT Triple, YieldGard corn borer plus
any B.t. acres) and must be planted with a hybrid that does not contain a B.t. technology for control of European and
southwestern corn borer and must be planted within 1/2 mile (1/4 mile preferred) of the YieldGard VT Tripe field.
Farmers may spray for corn borer control if economic thresholds are reached.
The corn borer refuge can be Roundup Ready Corn 2 or conventional corn. Popcorn can be used as a refuge option
but sweet corn can not.
CORN ROOTWORM REFUGE REQUIREMENTS
Must be planted with a hybrid that does not contain a B.t. technology for control of western, northern and Mexican
corn rootworm, but can be planted with B.t. hybrids that control corn borer (e.g., YieldGard Corn Borer). The corn
rootworm refuge must represent at least 20 percent of the farmer's corn acres. (YieldGard Plus or YieldGard VT Triple
and YieldGard Corn Borer) and must be planted within or adjacent to the YieldGard Plus or YieldGard VT Triple field
as a block, strips within the field, or as a perimeter arounkd the field. If perimeter or in-field strips are used for the
refuge, the strips must be at least four consecutive rows wide.
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CORN BORER REFUGE REQUIREMENTS
Must represent at least 50 percent of total corn acres (YieldGard Plus or YieldGard VT Triple, YieldGard corn borer plus any
B.t. acres) and must be planted with a hybrid that does not contain a B.t. technology for control of European and
southwestern corn borer and must be planted within 1/2 mile (1/4 mile preferred) of the YieldGard VT Tripe field.
Farmers may spray for corn borer control if economic thresholds are reached.
The corn borer refuge can be Roundup Ready Corn 2 or conventional corn. Popcorn can be used as a refuge option
but sweet corn can not.
CORN ROOTWORM REFUGE REQUIREMENTS
Must be planted with a hybrid that does not contain a B.t. technology for control of western, northern and Mexican
corn rootworm, but can be planted with B.t. hybrids that control corn borer (e.g., YieldGard Corn Borer). The corn
rootworm refuge must represent at least 20 percent of the farmer's corn acres. (YieldGard Plus or YieldGard VT Triple
and YieldGard Corn Borer) and must be planted within or adjacent to the YieldGard Plus or YieldGard VT Triple field
as a block, strips within the field, or as a perimeter arounkd the field. If perimeter or in-field strips are used for the
refuge, the strips must be at least four consecutive rows wide.
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