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

2016 Cotton Insect Update

Photo: Jeremy Greene

Dominic Reisig NCSU Entomology

Percent Acres Sprayed for Plant Bugs in NC

10 20 30 40 50 60

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

0.2 0.4 0.6 0.8 1 1.2

1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015

20 40 60 80 100 120 140 160

87 89 91 93 95 97 99 01 03 05 07 09 11 13

$86.50 $140.49

Foliar Insect Control: MS Delta

Cost ($ per Acre)

Bollgard BWE OP Resistance 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

22 21 23 38 37 44 44 56 10 20 30 40 50 60 70 Mid-April Early-May Mid-May Late-May

Early Late Percent Yield Loss Planting Date

3 3 3 4 6 7 6 6

Impact of N Rate

966 1,266 1,424 1,336 1,386

200 400 600 800 1000 1200 1400 1600 40 80 120 160

Lint per acre Nitrogen Application Rate

2.5 3.5 3 4 4.5

Impact of Irrigation

1,568 1,497 1,472 1,085

200 400 600 800 1000 1200 1400 1600 1800 First Square First Flower Peak Flower Non-Irrigated

Lint per acre Irrigation Initiation

3.62 1.87 1.5 1.62

Impact of Nozzle Type

15.8 10.3 7 6.8 6.3 5.5 5.5 5.3 4 3.5 3 2

2 4 6 8 10 12 14 16 18

Check Turbo Tee 11002 Teejet XR FF 11004 Turbo Tee 11003 Turbo Tee 11004 GL Airmix 11003 Teejet FF 11003 GL Airmix 11002 GL Airmix 110025 Air Induction 11002 Air Induction 110015 Hollow Cone TX-8

ab bc bc bc bc bc bc c c c a bc Number per Drop Cloth

Air vs Ground

22.9 31.8 26.8 4.1 11.5 15.9 1.2 2.2 7.8

5 10 15 20 25 30 35 5 DAT2 9 DAT2 14 DAT2

Untreated Air Ground

Number per Drop Cloth

Regional TPB Trial

All Locations - Season Total

0.0 20.0 40.0 60.0 80.0 100.0 120.0

• No. Nymphs

35% 64%

Sequential Applications

30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0

4 DAT 1 4 DAT 2

Insecticide Application Intervals

23 8 100 100 70 20 20 40 60 80 100 120 5 10 15 20 25 Pre-Test Counts Percent Control 4 Days 5 Days 6 Days 7 Days

Percent Nymphs/6 ft.

Pre-treatment 4 DAT with Orthene

Insecticide Rotations

5 10 15 20 25

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

Non-treated Orthene Centric

Number/6 ft.

5 days 9 days

Diamond Application Timing

957 1080 1154 1223

700 800 900 1000 1100 1200 1300

Lbs Lint / Acre

+69 +74 +123

+266 lbs

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)

C B A AB AB 1000 1500 2000 2500 3000 3500 4000 40 80 120 160 Nitrogen Application Rate Lbs/A

Effect of Nitrogen Rate

2.5 3.5 3 4 4.5

Standard:

Smooth (DP 1050B2RF) May 27, June 13 No Diamond

120 lbs N BMP:

Hairy (STN 5288B2RF)

• Apr. 21, Apr. 24

3rd Wk. Sq. Diamond

80 lbs N

Total Number of Applications

3 6 3 1 1 2 3 4 5 6 7

Delta BMP Delta Standard Hills BMP Hills Standard

Cost of Foliar Applications

$38.55 $61.75 $34.80 $7.75

$0.00 $10.00 $20.00 $30.00 $40.00 $50.00 $60.00 $70.00 Delta BMP Delta Standard Hills BMP Hills Standard

Pounds of Lint per Acre

1,589 624 892 734

500 1000 1500 2000 Delta BMP Delta Standard Hills BMP Hills Standard

A C B BC

Net Income

$1,296.14 $465.54 $714.21 $609.19

$0.00 $200.00 $400.00 $600.00 $800.00 $1,000.00 $1,200.00 $1,400.00 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 5th 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

Prowl + Reflex PRE, Roundup + Dual Magnum POST 1, Roundup + Warrant POST 2, Direx + MSMA layby

PRE POST 1 = 25 d after PRE POST 2 Layby PRE POST 1 = 17 d after PRE POST 2 Layby No PRE POST 1 = 17 d after PRE POST 2 Layby

3.91 4.18 4.38 2.74 3.51 3.72 1.68 2.21 3.24 1 2 3 4 5

No PRE PRE (1X) PRE (2X) No PRE PRE (1X) PRE (2X) No PRE PRE (1X) PRE (2X)

Damage Rating (0-5)

Thrips Damage: PRE x Thrips (SE Region - 2013 and 2014) Moderate to High Thrips Pressure, n=6

Untreated Seed Trt. ST+acephate Phillip Roberts, UGA

1,339 1,546 1,584 1,278 1,503 1,590 1,003 1,235 1,446 200 400 600 800 1000 1200 1400 1600 1800

Untreated Seed Trt. Seed Trt. + acephate (1-leaf) Untreated Seed Trt. Seed Trt. + acephate (1-leaf) Untreated Seed Trt. Seed Trt. + acephate (1-leaf)

Yield (lbs. lint/acre)

Yield: PRE x Thrips (SE Region - 2013 and 2014) Moderate to High Thrips Pressure, n=6

No PRE PRE (1X) PRE (2X)

Phillip Roberts, UGA

What to do for thrips in 2016?

• Use seed treatments
• Insecticide-free cotton seed not

generally commercially available

• We must use something at

planting

• Seed treatment
• + Admire/Velum at highest labeled

rate

• + Orthene
• Alone + spray

Treatment

1st 2nd 3rd 1st + 2nd + 3rd

Aeris seed + Admire Pro 7.2 oz

58 8 17 83

Aeris seed + Orthene 97 8 oz

67 17 83

Avicta CP seed + Admire Pro 7.2 oz

17 25 33 75

Temik 15G 5lb

33 25 8 67

Orthene 16 oz

25 33 58

Admire Pro 9.2 oz

25 25 50

Thimet 20G 5lb

17 17 17 50

Avicta CP seed + Orthene 97 8 oz

25 8 33

Velum 14 oz

17 17 33

Aeris seed

8 8 17 33

Poncho VOTiVO/Aeris seed

8 17 25

Avicta CP seed

8 8

Untreated

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
• Insecticide-free cotton seed not

generally commercially available

• We must use something at

planting

• Seed treatment
• + Admire/Velum at highest labeled

rate

• + Orthene
• Alone + spray
• Be prepared for foliar spray at 1-2

leaf stage

• Scouting is critical

Treatment 1st 2nd 1st + 2nd

Avicta CP seed + Orthene 97 6 oz

31 33 64

Avicta CP seed + Radiant SC 3 oz

38 8 46

Avicta CP seed + Radiant SC 1.5 oz

19 25 44

Avicta CP seed + Orthene 97 3 oz

13 25 38

Avicta CP seed

8 8

Untreated

What to do for thrips in 2016?

No insecticidal seed treatment