Bt on the Chopping Block – EPA Plans Variety Phase Out – DTN

    In an effort to stave off above-ground insect resistance, the EPA is proposing phasing out many current Bt corn hybrids, as well as some Bt cotton varieties, in the next three-to-five years.

    Essentially, all Bt corn hybrids and cotton varieties that don’t include Syngenta’s Vip3A protein, the lone Bt trait on the market without documented insect resistance, are being considered for a national phase-down to a “limited acreage cap” yet to be determined.

    The proposal suggests phasing down many common and popular Bt-traited corn products, as well as one new rootworm trait package with a unique RNAi mode of action — SmartStax PRO — that hasn’t yet been commercialized.

    The phase-out plan, found in EPA’s recent publication, “EPA Draft Proposal to Address Resistance Risks to Lepidopteran Pests of Bt,” is only a proposal for now. EPA is seeking public comment from all stakeholders, including farmers, through Nov. 9, 2020. You can comment here

    Here is a comprehensive list, based on DTN’s analysis of the EPA proposal, of every corn hybrid and cotton variety up for phase-out over the next three-to-five years, organized by their original registrant.

    THREE-YEAR CORN PHASE-OUT

    PIONEER & DOW AGROSCIENCES (Now under Corteva)

    Herculex I; Herculex I Insect Protection
    EPA Reg. No.: 68467-2; 29964-3
    Bt trait: Cry1F

    Herculex XTRA Insect Protection
    EPA Reg. No.: 29964-5; 29964-17; 68467-6
    Bt Traits: Cry1F + Cry34/35Ab1

    PIONEER (Now under Corteva)

    Optimum AcreMax l
    EPA Reg. No.. 29964-6
    Bt Traits: Cry1F + Cry34/35Ab1 seed blend

    Optimum TRIsect
    EPA Reg. No.: 29964-13
    Bt Traits: Cry1F + mCry3A

    SYNGENTA

    Agrisure CB/LL; Agrisure GT/CB/LL; Agrisure 3010; Agrisure Artesian 3010A
    EPA Reg. No.: 67979-1
    Bt Trait: Cry1Ab

    Agrisure CB/RW; Agrisure 3000GT; Agrisure 3011A
    EPA Reg. No.: 67979-8
    Bt Traits: Cry1Ab + mCry3A

    Attribute Insect Protected Sweet Corn
    EPA Reg. No.: 65268-1
    Bt Trait: Cry1Ab

    MONSANTO (Now under Bayer)

    YieldGard Corn Borer
    EPA Reg. No.: 524-489
    Bt Trait: Cry1Ab

    FIVE-YEAR CORN PHASE-OUT

    PIONEER (Now under Corteva)

    Optimum Intrasect
    EPA Reg. No.: 29964-7
    Bt Traits: Cry1Ab + Cry1F

    Optimum AcreMax Insect Protection
    EPA Reg. No.: 29964-12
    Bt Traits: Cry1F + Cry1Ab seed blend

    Optimum AcreMax Xtra
    EPA Reg. No: 29964-11
    Bt Traits: Cry1F + Cry1Ab + Cry34/35Ab1 seed blend

    Optimum Intrasect Xtra
    EPA Reg. No.: 29964-8
    Bt Traits: Cry1Ab + Cry1F + Cry34/35Ab1

    Optimum Intrasect Xtreme
    EPA Reg. No.: 29964-14
    Bt Traits: Cry1F + mCry3A + Cry1Ab + Cry34/35Ab1

    Optimum AcreMax Xtreme seed blend
    EPA Reg. No.: 29964-16
    Bt Traits: Cry1F + Cry34/35Ab1 + Cry1Ab + mCry3A seed blend

    QROME
    EPA Reg. No.: 29964-22
    Bt Traits: Cry34/35Ab1 + Cry1F + Cry1Ab + mCry3A

    QROME seed blend (RIB)
    EPA Reg. No.: 29964-21
    Bt Traits: Cry34/35Ab1 + Cry1F + Cry1Ab + mCry3A seed blend

    Optimum AcreMax Trisect
    EPA Reg. No.: 29964-23
    Bt Traits: Cry1F + Cry1Ab + mCry3A seed blend

    Optimum Intrasect Trisect
    EPA Reg. No.: 29964-24
    Bt Traits: Cry1F + Cry1Ab + mCry3A

    SYNGENTA

    Agrisure 3122
    EPA Reg. No.: 67979-17
    Bt Traits: Cry1Ab + Cry34/35Ab1 + mCry3A + Cry1F

    Agrisure 3122 E-Z Refuge Corn
    EPA Reg. No.: 67979-20
    Bt Traits: Cry1Ab + Cry34/35Ab1 + mCry3A + Cry1F seed blend

    Agrisure Duracade 5122 Refuge Renew; Agrisure Duracade 5122A Refuge Renew
    EPA Reg. No.: 67979-24
    Bt Traits: Cry1Ab + mCry3A + Cry1F + eCry3.1Ab

    Agrisure Duracade 5122 E-Z Refuge; Agrisure Duracade 5122A E-Z Refuge; Agrisure Duracade 5122 Refuge Advanced
    EPA Reg. No.: 67979-25
    Bt Traits: Cry1Ab + mCry3A + Cry1F + eCry3.1Ab seed blend

    Agrisure 3120 E-Z Refuge; Agrisure 3120A E-Z Refuge
    EPA Reg. No.: 67979-31
    Bt Traits: Cry1Ab + Cry1F seed blend

    Agrisure 3120 Refuge Renew; Agrisure 3120A Refuge Renew
    EPA Reg. No.: 67979-33
    Bt Traits: Cry1Ab + Cry1F

    MONSANTO (Now, under Bayer)

    Genuity VT Double Pro
    EPA Reg. No.: 524-575
    Bt Traits: Cry1A.105/Cry2Ab2

    Genuity VT Double PRO RIB Complete
    EPA Reg. No.: 524-597
    Bt Traits: Cry1A.105/Cry2Ab2 seed blend

    Genuity VT Triple PRO
    EPA Reg. No.: 524-576
    Bt Traits: Cry1A.105/Cry2Ab2 + Cry3Bb1

    Genuity VT Triple PRO RIB Complete
    EPA Reg. No.: 524-606
    Bt Traits: Cry1A.105/Cry2Ab2 + Cry3Bb1 seed blend

    Genuity PowerCore
    EPA Reg. No.: 524-585
    Bt Traits: Cry1A.105/Cry2Ab2 + Cry1F

    Genuity PowerCore RIB Complete
    EPA Reg. No.: 524-612
    Bt Traits: Cry1A.105/Cry2Ab2 + Cry1F seed blend

    SmartStax PRO
    EPA Reg. No.: 524-632
    Bt Traits: Cry1A.105/Cry2Ab2 + Cry1F + Cry3Bb1 + Cry34/35Ab1 + DvSnf (RNAi trait)

    SmartStax PRO RIB Complete
    EPA Reg. No.: 524-631
    Bt Traits: Cry1A.105/Cry2Ab2 + Cry1F + Cry3Bb1 + Cry34/35Ab1 + DvSnf (RNAi trait) seed blend

    MONSANTO & DOW AGROSCIENCES

    Genuity SmartStax; SmartStax
    EPA Reg. No.: 524-581; 68567-7
    Bt Traits: Cry1A.105/Cry2Ab2 + Cry1F + Cry3Bb1 + Cry34/35Ab1

    Genuity SmartStax RIB Complete; SmartStax Refuge Advanced; Refuge Advanced Powered by SmartStax
    EPA Reg. No.: 524-595; 68567-16
    Bt Traits: Cry1A.105/Cry2Ab2 + Cry1F + Cry3Bb1 + Cry34/35Ab1 seed blend

    DOW AGROSCIENCES (Now under Corteva)

    PowerCore; PowerCore Enlist
    EPA Reg. No.: 68467-12
    Bt Traits: Cry1A.105/Cry2Ab2 + Cry1F

    SmartStax Enlist Refuge Advanced; SmartStax Refuge Advanced; Refuge Advanced Powered by SmartStax
    EPA Reg. No.: 68467-16
    Bt Traits: Cry1A.105/Cry2Ab2 + Cry1F + Cry3Bb1 + Cry34/35Ab1 seed blend

    PowerCore Enlist Refuge Advanced; PowerCore Refuge Advanced; Refuge Advanced Powered by PowerCore
    EPA Reg. No.: 68467-21
    Bt Traits: Cry1A.105/Cry2Ab2 + Cry1F seed blend

    SmartStax PRO Enlist
    EPA Reg. No.: 62719-706
    Bt Traits: dvSnf7 (RNAi trait) + Cry1A.105/Cry2Ab2 + Cry1F + Cry3Bb1 + Cry34/35Ab1

    SmartStax PRO Enlist Refuge Advanced; SmartStax PRO Refuge Advanced
    EPA Reg. No.: 62719-707
    Bt Traits: dvSnf7 (RNAi trait) + Cry1A.105/Cry2Ab2 + Cry1F x Cry3Bb1 + Cry34/35Ab1

    FIVE-YEAR COTTON PHASE-OUT

    Widestrike (developed by Dow Agrosciences, now under Corteva)
    EPA Reg. No.: 68467-3
    Bt Traits: Cry1F + Cry1Ac

    Bollgard II (developed by Monsanto, now under Bayer)
    EPA Reg. No.: 524-522
    Bt Traits: Cry1Ac + Cry2Ab2

    TwinLink (developed by Bayer, now under BASF)
    EPA Reg. No.: 264-1096
    Bt Traits: Cry1Ab + Cry2Ae

    The current owners of most of these traits, Bayer, Syngenta, and Corteva, declined to comment on these specific corn hybrid and cotton variety phase-out proposals.

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    However, Bayer and Syngenta both provided statements saying that they were analyzing the draft and were planning to comment to EPA as a group, via the Agricultural Biotechnology Stewardship Technical Committee (ABSTC).

    “We remain committed to working with the EPA on practical approaches for IRM [integrated resistance management] while preserving grower choice and will use the timeframe provided before making any decisions on next steps,” a Syngenta statement emailed to DTN said.

    In his statement, Graham Head, head of resistance management at Bayer, echoed that sentiment and added, “The EPA stresses that this is a draft proposal and they are still seeking feedback per the public comment period. Specifically, EPA says it will ‘modify the proposal as appropriate and work with registrants to finalize a new IRM framework for Bt corn and cotton PIP registrations.'”

    Once again, any member of the public can comment on this EPA draft proposal here through Nov. 9, 2020.

    Emily Unglesbee can be reached at Emily.unglesbee@dtn.com

    Follow her on Twitter @Emily_Unglesbee

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