Landscape Management to Reduce Tarnished Plant Bugs in Cotton Jeff - - PowerPoint PPT Presentation

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Landscape Management to Reduce Tarnished Plant Bugs in Cotton Jeff - - PowerPoint PPT Presentation

Landscape Management to Reduce Tarnished Plant Bugs in Cotton Jeff Gore MSU, DREC Gordon Snodgrass, Craig Abel, and O.P. Perera USDA-ARS Seasonal Occurrence of Plant Bugs Cultivated Hosts Reproductive Diapause Break Diapause Wild Hosts


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Jeff Gore

MSU, DREC Gordon Snodgrass, Craig Abel, and O.P. Perera USDA-ARS

Landscape Management to Reduce Tarnished Plant Bugs in Cotton

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Seasonal Occurrence of Plant Bugs Winter Spring Summer Fall

Dec.-Feb. Feb.-May June-Sept. Sept.-Dec.

Reproductive Diapause Break Diapause Wild Hosts

Wild Hosts Cultivated Hosts

Wild Hosts Enter Diapause Wild Hosts

Burndown Planting Squaring Flowering Harvest

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Week 2 Week 3 Week 4 Week 1

Distribution of Tarnished Plant Bugs in the Landscape - May

High Medium Low

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Week 1 Week 2 Week 3 Week 4

Distribution of Tarnished Plant Bugs in the Landscape - June

High Medium Low

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Distribution of Tarnished Plant Bugs in the Landscape - July

Week 1 Week 2 Week 3 Week 4 High Medium Low

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Gene Flow Between Populations 2006

O.P. Perera, USDA-ARS

0.62, 2.83, 5.72 Key: May, July, September 0.53, 5.45, 8.43

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Tunica/Robinsonville Clarksdale Leland/Stoneville Rolling Fork/Cary Vicksburg

  • St. Joseph, LA

2007-2008

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Late Winter and Early Spring Winter Spring

Dec.-Feb. Feb.-May

Reproductive Diapause Break Diapause Wild Hosts

Wild Hosts Cultivated Hosts

Wild Hosts Enter Diapause Wild Hosts

Burndown Planting Squaring Flowering Harvest

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Examples of early-spring broadleaf hosts of tarnished plant bug

Buttercup Evening Primrose Butterweed Annual Fleabane Sourdock Vetch Crimson Clover Cutleaf Primrose

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Area-wide Plant Bug Management

Gordon Snodgrass, William Scott, and Craig Abel – USDA-ARS

One herbicide application from late-Feb. through March.

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Area-Wide Plant Bug Control MS Delta

1 2 3 4 5 6 1 2 3 4 1 2 3 4

Treated Untreated

Week in June

  • No. per 100 sweeps

Week in July

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  • No. Plant Bug Applications

0.9 3.1 5.5 3.2 1.7 3.8 7 4.2 1 2 3 4 5 6 7 8 1999 2000 2001 Average Treated Untreated

Average

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Economic Benefit

$6.46 $7.81 $3.44 $5.90

1 2 3 4 5 6 7 8 9 1999 2000 2001 Average

Dollars per Acre

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Area-Wide Plant Bug Control MS Hills

0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 6/6 6/13 6/20 6/27 7/4 7/11 7/18 7/25

Treated Untreated

Sample Date

  • No. per 100 sweeps
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Untreated Treated

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Treated with Roundup at Burndown

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Summer (Crop Season) Summer

June-Sept.

Reproductive Diapause Break Diapause Wild Hosts

Wild Hosts Cultivated Hosts

Wild Hosts Enter Diapause Wild Hosts

Burndown Planting Squaring Flowering Harvest

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Regional Temik Side-Dress Study

Missouri – Kelly Tindall Arkansas – Gus Lorenz, Glen Studebaker, and Scott Akin Tennessee – Scott Stewart Mississippi – Jeff Gore, Angus Catchot, Don Cook, and Fred Musser Louisiana – Ralph Bagwell and Roger Leonard

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Temik Side Band Applications

3.9 11.9 9.8 2 4.8 8.8 4.1 2.3 6.8 2 4 6 8 10 12 14 5 DAT 10 DAT 20 DAT

Non-treated Temik 5 lbs. Temik 8 lbs.

  • No. Nymphs per 6 row ft.

60-80% 10-31%

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Fall - Winter (Reproductive Diapause) Winter Fall

Dec.-Feb. Sept.-Dec.

Reproductive Diapause Break Diapause Wild Hosts

Wild Hosts Cultivated Hosts

Wild Hosts Enter Diapause Wild Hosts

Burndown Planting Squaring Flowering Harvest

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Overwintering Habitats

  • Winter Annuals

– Mostly henbit,

Lamium amplexicaule

  • Plant Debris
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Percentages of Reproductive Females with Mature Eggs (2002-04) – G. Snodgrass

Month December January Wk 1 2 3 4 1 2 3 4 Henbit 30 59 75 62 75 95 100 96 Plant Debris 6 35 85 87 95 Mustard

  • 27

93 83 92 % with Mature Eggs

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Butterweed Daisy Fleabane Shepherdspurse Buttercup Sour Dock Henbit

Occurrence of Nymphs on Winter and Spring Hosts

  • G. Snodgrass, 1999-2001

Jan. Feb. Mar. Apr.

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Summary and Conclusions

  • Host management during the early spring can

provide an economic benefit.

  • Crop arrangement and border management

from planting through summer.

  • Fall and winter management has not been

investigated, and may provide some good

  • pportunities.
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Summary and Conclusions

  • Tarnished plant bugs feed and reproduce on
  • ver 350 plant species which makes it a difficult

challenge.

  • Because of that, management from a landscape

perspective using an integrated approach will yield the greatest success.

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