Agricultural. Making Better Decisions. Experiment Station Colorado Corn Variety Performance Trials. Technical Report TR15-9

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1 Technical Report TR15-9 Agricultural Experiment Station College of Agricultural Sciences Department of Soil & Crop Sciences Extension Making Better Decisions 2015 Colorado Corn Variety Performance Trials

2 Table of Contents Authors...3 Acknowledgments Irrigated Corn Hybrid Performance Trial at Holyoke Irrigated Corn Hybrid Performance Trial at Rocky Ford Irrigated Corn Hybrid Performance Trial at Wiggins Irrigated Corn Hybrid Performance Trial at Yuma Irrigated Corn Hybrid Performance Trial at Burlington...10 Corn Biotech Traits...11 For the fastest access to up-to-date variety information and results visit us at: Research conducted by Colorado State University Crops Testing Program Department of Soil and Crop Sciences Colorado State University Extension Colorado Agricultural Experiment Station Disclaimer **Mention of a trademark or proprietary product does not constitute endorsement by the Colorado Agricultural Experiment Station.** Colorado State University is an equal opportunity/affirmative action institution and complies with all Federal and Colorado State laws, regulations, and executive orders regarding affirmative action requirements in all programs. The Office of Equal Opportunity is located in 101 Student Services. In order to assist Colorado State University in meeting its affirmative action responsibilities, ethnic minorities, women, and other protected class members are encouraged to apply and to so identify themselves. 2

3 Authors Dr. Jerry Johnson - Professor and Extension Specialist - Crop Production, CSU Department of Soil and Crop Sciences, Phone: , Cell: , jerry.johnson@ colostate.edu. Sally Sauer - Research Associate - Crops Testing, CSU Department of Soil and Crop Sciences, Phone: , sally.sauer@colostate.edu. Ed Asfeld - Research Associate - Crops Testing, CSU Department of Soil and Crop Sciences, CR GG, Akron, CO 80720, Phone: , ed.asfeld@colostate.edu. Dr. Mike Bartolo - Superintendent and Research Scientist, CSU Arkansas Valley Research Center, Road 21, Rocky Ford, CO 81067, Phone: , michael.bartolo@ colostate.edu. Kevin Tanabe - Research Associate, CSU Arkansas Valley Research Center, Road 21, Rocky Ford, CO 81067, Phone: , kevin.tanabe@colostate.edu. Dr. Merle Vigil - Director and Research Soil Scientist, USDA-ARS, Central Great Plains Research Station, County Road GG, Akron, CO 80720, Phone: , merle.vigil@ars.usda.gov. Kierra Jewell - Administrative Assistant III, CSU Department of Soil and Crop Sciences, Phone: , kierra.jewell@colostate.edu. Acknowledgments The authors express their gratitude to the Colorado farmers and research stations who voluntarily and generously contributed the use of their land, equipment, and time to help CSU with the 2015 corn hybrid performance trials. We are thankful to the collaborating farmers, Tim Stahlecker at Burlington, Mark and Neil Lambert at Dailey, Brent Adler at Holyoke, Cooksey Farms at Wiggins, and Byron Weathers at Yuma. We thank Kevin Tanabe and Michael Bartolo at the Arkansas Valley Research Center for conducting the Rocky Ford trial. The trials would not be possible without research support provided by the Colorado State University Agricultural Experiment Station. 3

4 2015 Colorado Corn Hybrid Performance Trials Colorado State University conducts hybrid corn performance trials to provide research-based, unbiased and reliable information to Colorado corn producers so they can select the best hybrids for their farms. The corn hybrid performance trials are possible by funding received from company entry fees, the CSU Agricultural Experiment Station, and the Colorado Corn Growers Association. Colorado produced over 151 million bushels of corn on 960,000 harvested acres in 2015 according to the USDA National Ag. Statistics Service. The total value of production was over 604 million dollars in 2014 (most recent year available). Figure 1 shows the dryland and irrigated corn acres planted in Colorado from 1995 through In general, there has been a substantial increase in dryland acreage over the last 20 years, starting from 107,000 acres in 1995 and increasing to a high of 610,000 dryland acres in Nevertheless, Figure 1: Irrigated and Dryland Corn Acres Planted in Colorado from dryland acreage has decreased every 2014 year since The increase in dryland acreage (see upward slope of the red line) was probably due to herbicide tolerant hybrids. No-till and medium-till cropping systems were adopted by dryland farmers. They also diversified their farm operations by adopting mulitple crop systems. In some years, higher corn prices have also led to increased corn acreage. However, the rapid decrease in corn value and stubbornly high prices for corn inputs in the last year have combined to make corn less desirable and have resulted in reduced corn acreage. Figure 2: Irrigated and Dryland Corn Yields in Colorado from Figure 2 shows the yearly average yield for irrigated and dryland corn in Colorado from 1995 through There is a steady linear increase in irrigated corn yield from 121 bu/ac in 1995 to 191 bu/ac in Note that in 2006 and 2010 average yields were 200 bu/ac or better! Improved genetics and more precise farming practices may account for the increasing general trend in average irrigated yield. The high average yields in 2006 and 2010 were most likely due to higher than average growing season heat units (longer growing season). The dryland corn yields are highly dependent on weather conditions during the growing season. The amount and timing of rainfall received can make-or-break dryland corn yields. 4

5 This was true in the drought years from 2002 through 2006, and again in 2012 and 2013 when there was not enough rainfall during the growing season and the dryland yield fell below 50 bu/ac. It is hoped that new drought tolerance genetics, applied to hybrids suitable to Colorado conditions, will change the downward trend of dryland corn yields. In 2015, Colorado State University personnel planted five irrigated and two dryland corn trials in eastern Colorado. Irrigated trial locations were Burlington, Holyoke, Rocky Ford, Wiggins, and Yuma. The two dryland trials were located at Akron and Dailey. Our dryland trials did not give viable harvest results due to a severe hailstorm (stripping all leaves from plants) on August 1st at Akron and extensive early-season rodent damage at Dailey. Thirty-five hybrids with diverse origins, maturities, and value-added traits were tested in our different irrigated and dryland trial locations. Plot sizes were 150 ft 2. All irrigated trials were planted at 39,000 seeds per acre and Dailey was planted at 17,000 seeds per acre while the Akron trial was seeded at 14,000 seeds per acre. Seed yields for all trial varieties are reported in the tables. Yields are adjusted to 15.5% seed moisture content. Each table is intended to be stand-alone, containing all of the available information for that trial. 5

6 2015 Irrigated Corn Hybrid Performance Trial at Holyoke Brand Hybrid Insect and Herbicide Technology Traits a Yield b 2-Year Avg. Yield Relative Maturity c Moisture Test Weight Plant Height Population Lodging bu/ac bu/ac percent lb/bu in plants/ac percent NuTech/G2 Genetics 5Z-308 INT,RR2, LL , AgVenture AV7307AM AM, RR2, LL , AgVenture RL7687YHB INT, RR2, LL , AgVenture RL8767HB HX, RR2, LL , AgVenture AV6805YHR INT, RR2, LL , NuTech/G2 Genetics 5Z-906 INT,RR2, LL , NuTech/G2 Genetics 5F-709 AM, RR2, LL , LG Seeds LG5548STXRIB STXRIB, RR2, LL , LG Seeds LG2602VT3PRIB VT3PRIB, RR , LG Seeds LG5579VT3PRIB VT3PRIB, RR , LG Seeds LG5618STXRIB STXRIB, RR2, LL , NuTech/G2 Genetics 5X-905 HXT, RR2, LL , NuTech/G2 Genetics 5Z-504 INT,RR2, LL , Average , d LSD (P<0.30) 12.6 a Technology trait designations: AM=Optimum AcreMax; HX=Herculex 1; HXT=Herculex XTRA; INT=Optimum Intrasect; LL=LibertyLink; RR2=Roundup Ready 2; STXRIB=Genuity SmartStax Refuge in the Bag Complete; VT3PRIB=Genuity VecTran Triple Protection Refuge in the Bag Complete. b Yields corrected to 15.5% moisture. c Relative maturity is provided by the respective companies and is the approximate time from planting to harvest maturity. The method of calculation of the relative maturity ratings may vary among companies. d If the difference between two hybrid yields equals or exceeds the LSD value, there is a 70% chance the difference is significant. Plot size: 5' x 30' Site Information Collaborator: Brent Adler Planting Date: May 7, 2015 Harvest Date: November 9, 2015 Fertilizer: Nitrogen at 238 (3 lb as slow release N) phosphorus at 70, sulfur at 35, and zinc at 1.5 lb/ac Herbicide: Roundup PowerMax at 32 oz/ac and Status at 3 oz/ac applied on 6/13/15 Roundup PowerMax at 32 oz/ac and Dual Magnum at 16 oz/ac applied on 6/24/15 Soil Type: Valent sand Irrigation Type: Center-pivot 6

7 2015 Irrigated Corn Hybrid Performance Trial at Rocky Ford Insect and Herbicide Relative Technology Traits a Yield b Maturity c Test Weight Population Brand Hybrid Moisture bu/ac percent lb/bu plants/ac LG Seeds LG5622STXRIB STXRIB, RR2, LL ,685 LG Seeds LG5618STXRIB STXRIB, RR2, LL ,621 LG Seeds LG2636VT3PRIB VT3PRIB, RR ,395 LG Seeds LG5677VT2Pro VT2Pro, RR ,621 Average ,331 d LSD (P<0.30) 5.5 a Technology trait designations: LL=LibertyLink; RR2=Roundup Ready 2; STXRIB=Genuity SmartStax Refuge in the Bag Complete; VT2Pro=Genuity VecTran Double Protection; VT3PRIB=Genuity VecTran Triple Protection Refuge in the Bag Complete. b Yields corrected to 15.5% moisture. c Relative maturity is provided by the respective companies and is the approximate time from planting to harvest maturity. The method of calculation of the relative maturity ratings may vary among companies. d If the difference between two hybrid yields equals or exceeds the LSD value, there is a 70% chance the difference is significant. Plot size: 5' x 30' Site Information Collaborator: Arkansas Valley Research Center (Mike Bartolo & Kevin Tanabe) Planting Date: May 18, 2015 Harvest Date: November 6, 2015 Fertilizer: N at 108 and P at 78 lb/ac Herbicide: Buccaneer Plus at 32 oz/ac and Status at 10 oz/ac Soil Type: Rocky Ford silty clay loam Irrigation Type: Furrow 7

8 2015 Irrigated Corn Hybrid Performance Trial at Wiggins Brand Hybrid Insect and Herbicide Technology Traits a Yield b 3-Year Avg. Yield Relative Maturity c Moisture Test Weight Plant Height Population bu/ac bu/ac percent lb/bu in plants/ac NuTech/G2 Genetics 5Z-906 INT,RR2, LL ,710 NuTech/G2 Genetics 5X-905 HXT, RR2, LL ,386 LG Seeds LG5548STXRIB STXRIB, RR2, LL ,664 NuTech/G2 Genetics 5Z-504 INT,RR2, LL ,344 LG Seeds LG5499STXRIB STXRIB, RR2, LL ,193 LG Seeds LG5523STXRIB STXRIB, RR2, LL ,994 LG Seeds LG5502STXRIB STXRIB, RR2, LL ,244 NuTech/G2 Genetics 5H-502 HX, RR2, LL ,565 Average ,387 d LSD (P<0.30) 11.7 a Technology trait designations: HX=Herculex 1; HXT=Herculex XTRA; INT=Optimum Intrasect; LL=LibertyLink; RR2=Roundup Ready 2; STXRIB=Genuity SmartStax Refuge in the Bag Complete. b Yields corrected to 15.5% moisture. c Relative maturity is provided by the respective companies and is the approximate time from planting to harvest maturity. The method of calculation of the relative maturity ratings may vary among companies. d If the difference between two hybrid yields equals or exceeds the LSD value, there is a 70% chance the difference is significant. Plot size: 5' x 30' Site Information Collaborator: Cooksey Farms Planting Date: May 17, 2015 Harvest Date: November 15, 2015 Fertilizer: Pre-plant: N at 100, P at 32, and S at 4.5 lb/ac Starter: N at 20, P at 18, K at 4.5, and Zn at 1 lb/ac Post-plant: N at 90, K at 10, and S at 10 lb/ac Herbicide: Roundup PowerMax at 32 oz/ac, Dual Magnum at 19 oz/ac, and WideMatch at 16 oz/ac Soil Type: Heldt clay Irrigation Type: Center-pivot 8

9 2015 Irrigated Corn Hybrid Performance Trial at Yuma Insect and Herbicide Relative Technology Traits a Yield b Maturity c Test Plant Moisture Weight Height Population Brand Hybrid bu/ac percent lb/bu in plants/ac NuTech/G2 Genetics 5Z-906 INT,RR2, LL ,326 NuTech/G2 Genetics 5F-709 AM, RR2, LL ,750 NuTech/G2 Genetics 5Z-308 INT,RR2, LL ,283 AgVenture AV6805YHR INT, RR2, LL ,169 LG Seeds LG2602VT3PRIB VT3PRIB, RR ,686 NuTech/G2 Genetics 5F-510 AM, RR2, LL ,104 NuTech/G2 Genetics 5X-905 HXT, RR2, LL ,082 LG Seeds LG5618STXRIB STXRIB, RR2, LL ,485 AgVenture RL8767HB HX, RR2, LL ,040 AgVenture AV7307AM AM, RR2, LL ,202 AgVenture RL7687YHB INT, RR2, LL ,702 LG Seeds LG5579VT3PRIB VT3PRIB, RR ,814 NuTech/G2 Genetics 5Z-504 INT,RR2, LL ,330 LG Seeds LG5548STXRIB STXRIB, RR2, LL ,532 Average ,679 d LSD (P<0.30) 7.9 a Technology trait designations: AM=Optimum AcreMax; HX=Herculex 1; HXT=Herculex XTRA; INT=Optimum Intrasect; LL=LibertyLink; RR2=Roundup Ready 2; STXRIB=Genuity SmartStax Refuge in the Bag Complete; VT3PRIB=Genuity VecTran Triple Protection Refuge in the Bag Complete. b Yields corrected to 15.5% moisture. c Relative maturity is provided by the respective companies and is the approximate time from planting to harvest maturity. The method of calculation of the relative maturity ratings may vary among companies. d If the difference between two hybrid yields equals or exceeds the LSD value, there is a 70% chance the difference is significant. Plot size: 5' x 30' Site Information Collaborator: Byron Weathers Planting Date: June 2, 2015 Harvest Date: November 10, 2015 Fertilizer: Dairy manure at 25 ton/ac plus 265 lb/ac of N through pivot Starter: N at 30, P at 41, K at 8, and Zn at 0.8 lb/ac Foliar: N at 4.6, P at 1.6, K at 2.1 and B at 0.08 lb/ac applied at V5 and again at VT growth stage Herbicide: Lumax at 86 oz/ac, atrazine at 28 oz/ac, and Roundup PowerMax at 32 oz/ac applied on 6/5/15 Roundup PowerMax at 32 oz/ac applied with foliar feed at V5 growth stage Insecticide: Dimate 4E at 13 oz/ac and Capture at 6 oz/ac applied at VT growth stage Soil Type: Valent sand Irrigation Type: Center-pivot 9

10 2015 Irrigated Corn Hybrid Performance Trial at Burlington Brand Hybrid Insect and Herbicide Technology Traits a Yield b Relative Maturity c Moisture Test Weight Plant Height Population Greensnap bu/ac percent lb/bu in plants/ac percent AgVenture RL8767HB HX, RR2, LL , NuTech/G2 Genetics 5Z-308 INT,RR2, LL , AgVenture RL7687YHB INT, RR2, LL , AgVenture AV6805YHR INT, RR2, LL , NuTech/G2 Genetics 5F-510 AM, RR2, LL , NuTech/G2 Genetics 5F-709 AM, RR2, LL , AgVenture AV7307AM AM, RR2, LL , Producers Hybrids 7068STX STX, RR2, LL , Producers Hybrids 6878STXRIB STXRIB, RR2, LL , NuTech/G2 Genetics 5Z-906 INT,RR2, LL , NuTech/G2 Genetics 5Z-504 INT,RR2, LL , Producers Hybrids 6108STXRIB STXRIB, RR2, LL , Producers Hybrids 7268STXRIB STXRIB, RR2, LL , Average , d LSD (P<0.30) 15.3 a Technology trait designations: AM=Optimum AcreMax; HX=Herculex 1; INT=Optimum Intrasect; LL=LibertyLink; RR2=Roundup Ready 2; STX=Genuity SmartStax; STXRIB=Genuity SmartStax Refuge in the Bag Complete. b Yields corrected to 15.5% moisture. c Relative maturity is provided by the respective companies and is the approximate time from planting to harvest maturity. The method of calculation of the relative maturity may vary among companies. d If the difference between two hybrid yields equals or exceeds the LSD value, there is a 70% chance the difference is significant. Plot size: 5' x 30' Site Information Collaborator: Tim Stahlecker Planting Date: May 15, 2015 Harvest Date: October 26, 2015 Fertilizer: Nitrogen at 220, phosphorus at 60, sulfur at 10, and zinc at 1 lb/ac Herbicide: Roundup PowerMAX at 32 oz/ac, Laudis at 2.5 oz/ac, and atrazine at 1 pint/ac Soil Type: Norka silt loam Irrigation Type: Center-pivot 10

6 April 2015 Updates to this bulletin posted at www.msuent.

These traits are meant to increase flexibility and profitability for producers, but sometimes also lead to questions or cause confusion about their spectrum of control or refuge requirements to delay

Table 1 lists the names of the important events (transformations of one or more genes) in corn, their more familiar Trade Names, the protein(s) expressed, and their pest targets.

In recent years, the pyramiding of Bt traits allowed for the reduction of some refuges from 20% to 10% or 5%, depending on the trait package.

11 6 April 2015 Updates to this bulletin posted at Handy Bt Trait Table With questions or for corrections, contact: Chris DiFonzo, Field Crops Entomologist Michigan State University, East Lansing, MI Most corn hybrids planted in the U.S. now contain one or more transgenic traits for weed or insect management. These traits are meant to increase flexibility and profitability for producers, but sometimes also lead to questions or cause confusion about their spectrum of control or refuge requirements to delay resistance. This bulletin provides a handy one-stop-guide to understand sales materials, bag tags, and the hybrids you purchase. Table 1 lists the names of the important events (transformations of one or more genes) in corn, their more familiar Trade Names, the protein(s) expressed, and their pest targets. Table 2 lists specific trait packages (combinations of events) sold by various seed companies, with their spectrum of control plus refuge % and location. In recent years, the pyramiding of Bt traits allowed for the reduction of some refuges from 20% to 10% or 5%, depending on the trait package. Some hybrids still require a structured refuge planted as a block or series of rows (within, adjacent to, or ~½ mile from the Bt field), but many hybrids are now sold as a convenient refuge-in-the-bag (RIB). But it is still important to take the following steps: *Understand the biology of each trait, the expected level of control, and refuge requirements; *Confirm that the seed you ordered the previous year is the seed delivered in the spring; *Keep good planting records and save a representative sample of bags or bag tags; *For herbicide applications, Ask Twice-Spray Once, especially if you hire a custom applicator; *Most important, if you see unexpected damage or poor performance of a trait (especially damage from corn rootworm), contact your seed dealer and extension educator immediately so that the field can be visited while the problem is still fresh and samples can be taken. This is critical to identify and manage cases of rootworm Bt resistance. This bulletin strives for completeness, but keeping track of Bt traits isn t easy. For a searchable, easy-to-use database of GM crop approvals, see the ISAAA web site at Table 1. Event names for proteins expressed in Bt corn plants Trade name Event name Protein(s) expressed Insect Target or Herbicide Activity Agrisure CB/LL Bt11 Cry1Ab+PAT corn borer + glufosinate tolerance Agrisure Duracade 5307 ecry3.1ab rootworm Agrisure RW MIR604 mcry3a rootworm Agrisure Viptera MIR162 Vip3Aa broad lep control Herculex 1 or CB TC1507 Cry1F + PAT corn borer + glufosinate tolerance Herculex RW DAS Cry34Ab1/Cry35Ab1+PAT rootworm + glufosinate tolerance Roundup Ready 2 NK603 CP4 EPSPS glyphosate tolerance YieldGard CB MON810 Cry1Ab corn borer YieldGard VT Pro MON89034 Cry1A.105+Cry2Ab2 broad lep control YieldGard VT RW MON88017 Cry3Bb1+CP4 EPSPS rootworm + glyphosate tolerance Insect targets BCW black cutworm CEW corn earworm ECB FAW fall armyworm RW corn rootworm European corn borer Abbreviations used in Table 2 on page 2 SB stalk borer Herbicide activity SWCB southern corn borer GT glyphosate tolerant TAW true armyworm LL Liberty Link, glufosinate-tolerant WBC western bean cutworm RR2 Roundup Ready 2, glyphosate-tolerant 11

12 Trait Family Product Bt protein(s) Insects controlled or suppressed Above-ground In soil Herbicide tolerant? Refuge %, placement (for the MIDWEST) AGRISURE Agrisure GT/CB/LL, 3010A Cry1Ab ECB SWCB CEW FAW SB --- GT LL 20% structured-½ mile Agrisure 3000GT, 3011A Cry1Ab mcry3a ECB SWCB CEW FAW SB RW GT LL 20% structured-w/in, adj Agrisure Viptera 3110 Cry1Ab Vip3A BCW CEW ECB FAW SB --- GT LL 20% structured-½ mile SWCB TAW WBC Agrisure Viptera 3111 Cry1Ab mcry3a Vip3A BCW CEW ECB FAW SB RW GT LL 20% structured-w/in, adj SWCB TAW WBC Agrisure 3122 Cry1Ab Cry1F mcry3a BCW ECB FAW SB RW GT 5% in the bag (RIB) E-Z Refuge Cry34/35Ab1 SWCB WBC CEW Agrisure Viptera 3220 Cry1Ab Cry1F Vip3A BCW CEW ECB FAW SB --- GT 5% in the bag (RIB) E-Z Refuge SWCB TAW WBC Agrisure Duracade 5122 Cry1Ab Cry1F BCW ECB FAW SB RW GT 5% in the bag (RIB) E-Z Refuge Agrisure Duracade 5222 E-Z Refuge mcry3a ecry3.1ab Cry1Ab Cry1F Vip3A mcry3a ecry3.1ab SWCB WBC CEW BCW CEW ECB FAW SB SWCB TAW WBC HERCULEX Herculex 1 (HX1) Cry1F BCW ECB FAW SB SWCB WBC CEW RW GT 5% in the bag (RIB) --- LL 20% structured-½ mile Herculex RW (HXRW) Cry34/35Ab1 --- RW RR2 (most) 20% structured-w/in, adj Herculex XTRA (HXX) Cry1F BCW ECB FAW SB RW 20% structured-w/in, adj Cry34/35Ab1 SWCB WBC CEW OPTIMUM TRIsect Cry1F mcry3a BCW ECB FAW SB RW LL RR2 20% structured-w/in, adj SWCB WBC CEW Intrasect Cry1F Cry1Ab BCW ECB FAW SB --- LL RR2 5% structured-½ mile SWCB WBC CEW Intrasect Leptra Cry1F Cry1Ab Vip3A BCW CEW ECB FAW SB --- LL RR2 5% structured-w/in, adj SWCB TAW WBC Intrasect XTra Cry1F Cry1Ab BCW ECB FAW SB RW LL RR2 20% structured-w/in, adj Cry34/35Ab1 SWCB WBC CEW Intrasect XTreme Cry1F Cry1Ab BCW ECB FAW SB RW LL RR2 5% structured-w/in, adj mcry3a Cry34/35Ab1 SWCB WBC CEW AcreMax (AM) Cry1F Cry1Ab BCW ECB FAW SB --- LL RR2 5% in the bag (RIB) SWCB WBC CEW AcreMax RW (AMRW) Cry34/35Ab1 --- RW LL RR2 10% in the bag (RIB) AcreMax1 (AM1) Cry1F Cry34/35Ab1 BCW ECB FAW SB RW LL RR2 10% in the bag (RW) & SWCB WBC CEW 20% structured-½ mile (CB) AcreMax TRIsect (AMT) Cry1F Cry1Ab mcry3a BCW ECB FAW SB RW LL RR2 10% in the bag (RIB) SWCB WBC CEW AcreMax Xtra (AMX) Cry1F Cry1Ab BCW ECB FAW SB RW LL RR2 10% in the bag (RIB) Cry34/35Ab1 SWCB WBC CEW AcreMax XTrem (AMXT) Cry1F Cry1Ab mcry3a BCW ECB FAW SB RW LL RR2 5% in the bag (RIB) Cry34/35Ab1 SWCB WBC CEW YIELDGARD / GENUITY YieldGard CB (YGCB) Cry1Ab ECB SWCB CEW FAW SB --- RR2 20% structured-½ mile YieldGard VT Rootworm Cry3Bb1 --- RW RR2 20% structured-w/in, adj YieldGard VT Triple Cry1Ab Cry3Bb1 ECB SWCB CEW FAW SB RW RR2 20% structured-w/in, adj Genuity VT Double PRO (or as RIB complete) Genuity VT Triple PRO (or as RIB complete) Genuity SmartStax RIB Complete OTHERS Smartstax (or as Refuge Advanced) Table 2. Bt corn trait packages, with spectrum of control and refuge requirements. (Updated 6 April 2015) Cry1A.105 Cry2Ab2 CEW ECB FAW SB SWCB --- RR2 5% structured-½ mile (or 5% in the bag (RIB)) Cry1A.105 Cry2Ab2 CEW ECB FAW SB SWCB RW RR2 20% structured-w/in, adj Cry3Bb1 (or 10% in the bag (RIB)) Cry1A.105 Cry2Ab2 Cry1F BCW CEW ECB FAW RW LL RR2 5% in the bag (RIB) Cry3Bb1 Cry34/35Ab1 SB SWCB WBC Cry1A.105 Cry2Ab2 Cry1F Cry3Bb1 Cry34/35Ab1 BCW CEW ECB FAW SB SWCB WBC RW LL RR2 5% structured-w/in, adj (or 5% in the bag (RIB)) 12

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Ag ricultural. Making Better Decisions. Experiment Station Colorado Corn Variety Performance Trials. Technical Report TR 14-11

Ag ricultural. Making Better Decisions. Experiment Station Colorado Corn Variety Performance Trials. Technical Report TR 14-11 Technical Report TR 14-11 Ag ricultural Experiment Station College of Agricultural Sciences Department of Soil & Crop Sciences Extension Making Better Decisions 2014 Colorado Corn Variety Performance Trials