New options for managing thrips in the upper Southeast 1 J. Bacheler, 1 T. Spivey, 2 A. Herbert, 1 D. Reisig, 1 K. Edmisten, 2 S. Malone and 1 D. Mott.

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Presentation transcript:

New options for managing thrips in the upper Southeast 1 J. Bacheler, 1 T. Spivey, 2 A. Herbert, 1 D. Reisig, 1 K. Edmisten, 2 S. Malone and 1 D. Mott 1 North Carolina State Univ. 2 Virginia Tech

Insect Damage Rankings (Independent Crop Consultants, 2012) 1. Stink bug 2. Thrips* 3. Plant bug 4. Bollworm** 5. Cotton aphid * ~ $15-18/seed trt. + $6.50 foliar spray ** ~ $20-30 tech fee.

Thrips Management “Breakthroughs”? 1. Seed treatments: Multiple insecticides (Poncho/VOTiVO/Aeris) Ultra-high rates (6-10x) 2. In-furrow sprays 3. Planting dates

Number thrips / 5 plants in UTC AMT, No. thrips / 5 plants VA MS TX AR LA GA NC * * * Note: VA and NC ~ 25 thrips/seedling SC

Comparison of seed treatments for thrips control, Rocky Mount and Plymouth, NC, 2012 Check Poncho/VOTiVO/Aeris 8x rate imidacloprid 3 weeks after plant 55.3 b 59.4 b 30.8 c a 57.3 bAvicta Complete Acceleron N Check Poncho/VOTiVO/Aeris 8x rate imidacloprid 4 weeks after plant 17.0 bc 34.7 b 10.2 c 66.8 a 29.5 bAvicta Complete Acceleron N

Impact of Avicta vs. Admire Pro on immature thrips, Washington Co., NC, 2012 Check Avicta Admire Pro (8.5 oz./Ac.) Check Avicta Admire Pro (8.5 oz./Ac.) Check Avicta Admire Pro (8.5 oz./Ac.) 3 weeks after plant4 wks. 5 wks a 15.3 b 31.0 b 27.8 a 34.5 a 16.0 b 83.0 a 26.0 b 31.8 b (# immature thrips /5 plants)

Impact of Avicta vs. Admire Pro on immature thrips, Edgecombe Co., NC, 2012 Check Avicta Admire Pro (8.5 oz./Ac.) Check Avicta Admire Pro (8.5 oz./Ac.) Check Avicta Admire Pro (8.5 oz./Ac.) 3 weeks after plant4 wks 5 wks a 99.3 b b 31.3 a 20.5 b 17.0 b 50.5 a 33.0 b 16.8 b (# immature thrips /5 plants)

Impact of selected in-furrow treatments for thrips control on seedling development, Suffolk, VA, 2012 Thrips injury rating 0=none 5=dead plants 4 weeks after trt. Check Orthene 16 oz/A Admire Pro 8.5 oz/A 4.50 a 3.44 b 2.31 c Verimark 13.5 oz/A 1.25 d

Thrips injury rating with selected in-furrow insecticides at 3.5 weeks after planting, Suffolk, VA, 2012 Thrips injury rating 0=none 5=dead plants 4 weeks after trt. Check Thimet; 5 lbs/A 3.13 b 2.31 c 2.13 c 3.19 b 2.06 c 4.06 a Counter; 5 lbs/A Temik; 5 lbs/A Admire Pro; 8.5 oz/A Orthene; 16 oz/A

Admire Pro + Avicta Avicta Check

9 gpa; 12 psi into middle of seed furrow

Impact of Avicta vs. Avicta with Admire Pro on immature thrips Wilson Co., NC, 2012 Check Avicta Avicta + Admire Pro (9 oz./Ac.) (# immature thrips /5 plants) Check Avicta Avicta + Admire Pro (9 oz./Ac.) Check Avicta Avicta + Admire Pro (9 oz./Ac.) 2 weeks after trt.3 wks. 4 wks a 5.3 b 1.5 b 64.8 a a 32.0 b a 46.5 b 9.0 c

Impact of Avicta vs. Avicta with Admire Pro on dry plant weight, Wilson Co., NC, 2012 grams /5 plants Check Avicta Avicta + Admire Pro (9 oz./Ac.) 4 weeks after trt c 3.17 b 3.92 a

Untreated Avicta + Admire Pro Avicta Comparison of Avicta to Avicta + Admire 31 days Wilson County, 2012

Impact of selected surfactants plus Orthene foliar on thrips injury to seedling cotton, Suffolk, VA, 2012 Thrips injury rating 0=none 5=dead plants 4 weeks after planting Check Orthene 4oz/A + Induce 0.25% 4.56 a 2.50 b 2.56 b 2.75 b 2.69 b 2.50 b 2.44 b Orthene 4 oz/A Orthene 4oz/A + Factor 0.25% Orthene 4oz/A + Response 0.25% Orthene 4oz/A + Agri-Dex 1% Orthene 4oz/A + Dyne-Amic 0.625%

Preliminary Observations: Seed treatments with multiple insecticides? Ultra-high seed treatment rates look promising Admire Pro in furrow with a seed treatment  excellent thrips activity  excellent persistence  “one and done” potential