2016 Cotton Insect Update Dominic Reisig NCSU Entomology Photo: - PowerPoint PPT Presentation

2016 Cotton Insect Update Dominic Reisig NCSU Entomology Photo: Jeremy Greene

Percent Acres Sprayed for Plant Bugs in NC 60 50 40 30 20 10 0 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015

Number of Applications for Plant Bugs in Total NC Cotton Acres 1.2 1 0.8 0.6 0.4 0.2 0 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015

Foliar Insect Control: MS Delta 160 $140.49 140 Cost ($ per Acre) 120 100 $86.50 80 60 40 BWE Bollgard OP Resistance 20 0 87 89 91 93 95 97 99 01 03 05 07 09 11 13 Pyrethroid Resistance

Tarnished Plant Bug Control has to be an Integrated Program Approach • Improved Sampling Techniques and Thresholds • Blocking Cotton Away from Corn • Manage for Earliness • Early Diamond Applications • Mixtures, Mixtures, and Mixtures • Shortened Intervals in Heavy Pressure Areas • Cultural Control (planting date, early maturing) • New Chemistry

Variety Pubescence Hairy Smooth

Impact of Planting Date and Varietal Maturity 70 Percent Yield Loss Early Late 60 56 50 44 44 38 37 40 30 23 22 21 20 10 3 3 3 4 6 7 6 6 0 Mid-April Early-May Mid-May Late-May Planting Date

Impact of N Rate 1600 1,424 1,386 1400 1,336 1,266 1200 Lint per acre 966 1000 800 600 400 200 2.5 3.5 3 4 4.5 0 0 40 80 120 160 Nitrogen Application Rate

Impact of Irrigation 1800 1,568 1600 1,497 1,472 1400 Lint per acre 1200 1,085 1000 800 600 400 200 3.62 1.87 1.5 1.62 0 First Square First Flower Peak Flower Non-Irrigated Irrigation Initiation

Impact of Nozzle Type Number per Drop Cloth 18 15.8 16 14 12 10.3 10 8 7 6.8 6.3 5.5 5.5 5.3 6 4 3.5 4 3 2 2 a ab bc bc bc bc bc bc c c c bc 0 Check Turbo Tee Teejet XR Turbo Tee Turbo Tee GL Airmix Teejet FF GL Airmix GL Airmix Air Air Hollow 11002 FF 11004 11003 11004 11003 11003 11002 110025 Induction Induction Cone TX-8 11002 110015

Air vs Ground Untreated Air Ground Number per Drop Cloth 35 31.8 30 26.8 25 22.9 20 15.9 15 11.5 10 7.8 4.1 5 2.2 1.2 0 5 DAT2 9 DAT2 14 DAT2

Regional TPB Trial All Locations - Season Total 120.0 100.0 No. Nymphs 35% 64% 80.0 60.0 40.0 20.0 0.0

Sequential Applications 4 DAT 1 4 DAT 2 100.0 90.0 80.0 70.0 60.0 50.0 40.0 30.0

Insecticide Application Intervals 4 Days 5 Days 6 Days 7 Days 25 120 23 100 100 4 DAT with 100 Nymphs/6 ft. 20 Orthene Percent 80 70 Pre-treatment 15 60 10 8 40 20 5 20 0 0 Pre-Test Counts Percent Control

Insecticide Rotations 25 Non-treated Orthene 20 Number/6 ft. Centric 15 10 5 0 8/3 8/4 8/5 8/6 8/7 8/8 8/9 8/10 8/11 8/12 8/13 8/14 8/15 8/16 8/17 8/18 8/19 8/20 8/21 8/22 8/23 8/24 5 days 9 days

Diamond Application Timing 1300 1223 +266 lbs 1200 +69 Lbs Lint / Acre 1154 +74 1080 1100 +123 1000 957 900 800 700

Other Factors that Impact Earliness • Seeding Rate • Thrips Management • Disease Management • Weed Management • Fertility and PGR’s

Tarnished Plant Bug Control has to be an Integrated Program Approach • Improved Sampling Techniques and Thresholds • Blocking Cotton Away from Corn • Manage for Earliness • Early Diamond Applications • Mixtures, Mixtures, and Mixtures • Shortened Intervals in Heavy Pressure Areas • Cultural Control (planting date, early maturing) • New Chemistry (Transform WG)

Effect of Nitrogen Rate Lbs/A BMP: Standard: 4000 Hairy Smooth A AB 3500 (STN 5288B2RF) (DP 1050B2RF) AB Apr. 21, Apr. 24 May 27, June 13 B 3 rd Wk. Sq. Diamond No Diamond 3000 80 lbs N 120 lbs N C 2500 2.5 3.5 3 4 4.5 2000 1500 1000 0 40 80 120 160 Nitrogen Application Rate

Total Number of Applications 7 6 6 5 4 3 3 3 2 1 1 0 Delta BMP Delta Standard Hills BMP Hills Standard

Cost of Foliar Applications $70.00 $61.75 $60.00 $50.00 $38.55 $34.80 $40.00 $30.00 $20.00 $7.75 $10.00 $0.00 Delta BMP Delta Standard Hills BMP Hills Standard

Pounds of Lint per Acre 2000 1,589 1500 892 1000 734 624 500 B BC A C 0 Delta BMP Delta Standard Hills BMP Hills Standard

Net Income $1,400.00 $1,296.14 $1,200.00 $1,000.00 $800.00 $714.21 $609.19 $600.00 $465.54 $400.00 $200.00 $0.00 Delta BMP Delta Standard Hills BMP Hills Standard

Edge Effects

Best Management Practices for NC • Plant cotton away from corn • Manage earliness • Focus more plant bug attention on late-planted and rank cotton • Scout from squaring through 5 th week of bloom • Squaring • Neonicotinoid • First flower • Pyrethroid • Pyrethroid fb Diamond in heavy pressure • Additional applications rotate insecticides • Transform • Orthene • Mixtures

Cruiser 5FS single dose assay classification - 2015

Gaucho 600FS single dose assay classification -2015

PRE No PRE PRE POST 1 = 25 d after PRE POST 1 = 17 d after PRE POST 1 = 17 d after PRE POST 2 POST 2 POST 2 Layby Layby Layby Prowl + Reflex PRE, Roundup + Dual Magnum POST 1, Roundup + Warrant POST 2, Direx + MSMA layby

Thrips Damage: PRE x Thrips (SE Region - 2013 and 2014) Moderate to High Thrips Pressure, n=6 5 4.38 4.18 3.91 4 3.72 3.51 Damage Rating (0-5) 3.24 3 2.74 2.21 2 1.68 1 0 No PRE PRE (1X) PRE (2X) No PRE PRE (1X) PRE (2X) No PRE PRE (1X) PRE (2X) Untreated Seed Trt. ST+acephate Phillip Roberts, UGA

Yield: PRE x Thrips (SE Region - 2013 and 2014) Moderate to High Thrips Pressure, n=6 1800 1,590 1,546 1,584 1600 1,503 1,446 1,339 1400 1,278 1,235 Yield (lbs. lint/acre) 1200 1,003 1000 800 600 400 200 0 Untreated Seed Trt. Seed Trt. + Untreated Seed Trt. Seed Trt. + Untreated Seed Trt. Seed Trt. + acephate acephate acephate (1-leaf) (1-leaf) (1-leaf) No PRE PRE (1X) PRE (2X) Phillip Roberts, UGA

What to do for thrips in 2016? 1 st 2 nd 3 rd 1 st + 2 nd + 3 rd Treatment • Use seed treatments Aeris seed + Admire Pro 7.2 oz 58 8 17 83 • Insecticide-free cotton seed not Aeris seed + Orthene 97 8 oz 0 67 17 83 generally commercially available Avicta CP seed + Admire Pro 7.2 oz 17 25 33 75 • We must use something at Temik 15G 5lb 33 25 8 67 planting Orthene 16 oz 25 0 33 58 • Seed treatment Admire Pro 9.2 oz 25 25 0 50 • + Admire/Velum at highest labeled Thimet 20G 5lb rate 17 17 17 50 • + Orthene Avicta CP seed + Orthene 97 8 oz 0 25 8 33 • Alone + spray Velum 14 oz 0 17 17 33 Aeris seed 8 8 17 33 Poncho VOTiVO/Aeris seed 0 8 17 25 Avicta CP seed 0 0 8 8 Untreated 0 0 0 0

What to do for thrips in 2016? • Scout for spraying • Best timing is around 1-2 leaf stage Phillip Roberts, UGA

What to do for thrips in 2016? • Use seed treatments 1 st 2 nd 1 st + 2 nd Treatment • Insecticide-free cotton seed not generally commercially available Avicta CP seed + 31 33 64 • We must use something at Orthene 97 6 oz planting Avicta CP seed + 38 8 46 • Seed treatment Radiant SC 3 oz • + Admire/Velum at highest labeled Avicta CP seed + 19 25 44 rate Radiant SC 1.5 oz • + Orthene Avicta CP seed + 13 25 38 • Alone + spray Orthene 97 3 oz • Be prepared for foliar spray at 1-2 Avicta CP seed 0 8 8 leaf stage Untreated 0 0 0 • Scouting is critical

What to do for thrips in 2016?

No insecticidal seed treatment