soybean insect pest management update—2012...brigade 2ec @ 5.12 oz baythroid xl @ 2.8 oz belay @ 2...
TRANSCRIPT
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Soybean Insect Pest Management Update—2012
Ames Herbert, Virginia Tech
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Stink bugs in soybean
Green adult
M. Spellman
Brown adult
M. Spellman
Spined soldier bug
M. Spellman
Green nymph
L. Schimming
Brown nymph
Russ O=ens, UGA www.InsecBmages.org BMSB
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• Stink bugs begin to migrate in large numbers into soybean fields at the R4 (full pod) soybean development stage
• Injury to soybeans includes undeveloped (flat) pods, punctured and deformed seed NDSU
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Galen Dively
Undamaged, maturing
BMSB damaged, ‘stay-green’
Stink bug feeding can also delay maturity, causing ‘stay green’ syndrome
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Stink bug “stay-green” injury—Orange Co., VA, 2011
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Brown marmorated stink bug (Halyomorpha halys Stahl)
A new pest in VA soybeans
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White bands on antennae
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Soybean-producing counties
Brown marmorated stink bug (BMSB) survey: 2010 range in Virginia soybean fields
BMSB detected in soybean (Accomack, Augusta, Brunswick, Caroline, Clarke, Culpeper, Gloucester, Greensville, Loudoun, Middlesex, Northampton, Rockingham, Stafford, Warren, Westmoreland)
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Brown marmorated stink bug (BMSB) survey: 2011 range in Virginia soybean fields
County was surveyed, but BMSB has not yet been found in soybean this season (Accomack, Appomattox, Chesapeake, Dinwiddie, Gloucester, Greensville, Isle of Wight, King & Queen, King William, Lancaster, Mathews, Northampton, Northumberland, Pittsylvania, Prince George, Richmond, Southampton, Suffolk, Surry, Sussex, Virginia Beach, Westmoreland)
BMSB detected in soybean, > 3 per 15 sweeps (Augusta, Campbell, Clarke, Culpeper, Fauquier, Frederick, Madison, Orange, Rappahannock, Spotsylvania, Stafford) BMSB detected in soybean, ≤ 3 per 15 sweeps (Bedford, Caroline, Essex, Goochland, Middlesex, Nelson, New Kent, Rockingham, Shenandoah)
Soybean-producing counties not surveyed
• 240 field visits from 2 Aug – 10 Oct
• First found on 2 Aug at growth stage R3 in Fauquier and Orange Co.; also found at R2 in Fauquier Co. on 9 Aug
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BMSB Efficacy Trials 1 and 3 in Soybean—Orange Co., VA, 2011
0 20 40 60 80 100
Belay @ 3 oz Belay @ 4 oz
Orthene 97 @ 8 oz Endigo ZC @ 5 oz
CMT 4586 @ 8 oz + MSO+ UAN Belay @ 2 oz + Baythroid XL @ 2.8 oz
Brigade 2EC @ 5.12 oz Baythroid XL @ 2.8 oz
Belay @ 2 oz + Kaiso 24WG @ 1.3 oz Lannate LV @ 1 pt
Lannate LV @ 1.5 pt Vydate L @ 1.5 pt
Lannate LV @ 2.25 pt Vydate L @ 3 pt
Cobalt Advanced @ 31 oz Vydate L @ 1 pt
Cobalt Advanced @ 22 oz Cobalt Advanced @ 25 oz
% control based on cumulative BMSB days Herbert, 2011 Virginia Tech
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BMSB Soybean Field Infesta8on Gradient Grower # 1
0.0
5.0
10.0
15.0
20.0
25.0
0 B 10 B 30 B 50 B 80 B 110 B
# of BMSB per 25 Sw
eeps
Na8ve SB Economic Threshold
# of BMSB per 25 Sw
eeps
Cissel & Whalen, 2011
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0
2
4
6
8
10
12
Perimeter Interior
Cissel & Whalen, 2011
BMSB Soybean Field Perimeter v/s Interior, Grower # 2 # of BMSB per 25 Sw
eeps
Na8ve SB Economic Threshold
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Tree of Heaven Orange Co., VA, 2011
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Tree of Heaven Ailanthus altissima (Mill.)
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BMSB also colonizes and moves from corn fields
B. Cissel & J. Whalen University of Delaware, 2011
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Effectiveness of Field Perimeter Treatments
• 12 commercial soybean fields • Culpeper, Madison, Orange, Clarke, Stafford, Fauquier, and Augusta Cos.
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BMSB edge treatments—2011
Location Product/rate Acres (entire field)
Culpeper et1 Lambda @ 5 oz 300 Madison et1 Acephate 97UP @ 12 oz 150 Madison et2 Acephate 97UP @ 12 oz 150 Orange et1 Acephate 97UP @ 12 oz 100 Orange et2 Acephate 97UP @ 12 oz 50 Fauquier et 01 Acephate 97UP @ 12 oz 300 Fauquier et02 Acephate 97UP @ 12 oz 220 Stafford 01 (Lannate @ 1.5 pt) Sniper @ 6.4 oz 300 Augusta et02 Sniper @ 6 oz + Warrior @ 2.5 oz 400 Madison 01 Bifenthrin @ 6 oz 300 Clarke et02 Endigo @ 4.5 oz 150 Clarke et03 Endigo @ 4.5 oz 250
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BMSB edge treatments—2011
Location Date
treated R-
stage
Post-treatment sample—number per 15 sweeps
Date 1 Date 2 Date 3 Date 4 Date 5
Culpeper et1 25-Aug 5 9/12 <1 9/19 <1 9/26 <1
Madison et1 25-Aug 5 9/1 0 9/7 0 9/15 0 9/22 0 9/29 0
Madison et2 25-Aug 5 9/1 <1 9/7 <1 9/15 0 9/22 0 9/29 0
Orange et1 25-Aug 5 9/1 0 9/7 0 9/15 0 9/22 0 10/3 0
Orange et2 25-Aug 5 9/1 0 9/7 0 9/15 0 9/22 0 9/29 0
Fauquier et 01 30-Aug 4 9/12 0 9/19 0 9/26 0 10/3 0
Fauquier et02 5-Sep 5 9/12 0 9/19 0 9/26 0
Stafford 01 28-Sep 6 10/3 0 10/ 10 0
Augusta et02 28-Sep 6 10/4 0 10/ 10 0
Madison 01 28-Sep 6 10/3 0 10/ 10 0
Clarke et02 28-Sep 6 10/3 0 10/ 10 0
Clarke et03 28-Sep 6 10/3 0 10/ 10 0
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Thresholds and sampling
# per row foot # per 15 sweeps
Row spacing 7-21” rows
Above 21”
7-21” rows
Above 21”
Stink bugs 1 1 2.4 3.6
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Economic Thresholds Threshold Soybean type or
stage State
1 per 6 row feet Seed LA, NC
1 per 3 row feet Grain, bloom to mid pod fill
GA, TN, MS
1 per 1 row foot Grain, mid pod fill to harvest
GA, NC, LA, TN, AK, VA
• Have not changed much in the last couple of decades
• Based on native stink bugs
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Based on Na8ve S8nk Bug Species • Infesta8ons occurring between R3 to R7 most damaging
Economic Thresholds AcBon Thresholds For NaBve SBnk Bugs in Soybeans During the
Pod Development and Pod Fill Stages
Used currently in DE, MD 1 per foot of row
5 per 25 sweeps
Some mid‐south states 2 per foot of row
9 per 25 sweeps
B. Cissel & J. Whalen University of Delaware, 2011
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Megacopta cribraria “Kudzu Bug”
Wayne Gardner, Phillip Roberts, & Dave BunBn, Univ. of Georgia Jeremy Greene, Clemson University
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Kudzu bug biology • 1‐3 generaBons per year in China • Overwinter in China but are acBve year‐round in India
• First found in the U.S. in Georgia, 2008; soybeans in 2009
• Can overwinter in north Georgia • Feed on soybean leaves, stems, and pods • Kudzu and Wisteria are also a hosts
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The home invasion
Photographs courtesy of Daniel R. Suiter, University of Georgia, College of Agriculture & Environmental Sciences
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Feb 9, 2011
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Megacopta cribraria (kudzu bug) occurrence in the Southeastern United States
Confirmed in 2011
Confirmed in 2009
Confirmed in 2010
Distribution map courtesy of W. Gardner, Univ. of Georgia Images by J. Greene, Clemson Univ.
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Alamance Alexander
Alleghany
Anson
Ashe
Avery
Beaufort
Ber8e
Bladen
Brunswick
Buncombe Burke
Cabarrus
Caldwell
Camden
Carteret
Caswell
Catawba
Chatham
Cherokee
Chowan
Clay
Cleveland
Columbus
Craven
Cumberland
Currituck
Dare
Davidson
Davie
Duplin
Durham Edgecombe
Forsyth Franklin
Gaston
Gates
Graham
Granville
Greene
Guilford
Halifax
Harne= Haywood
Henderson
Her^ord
Hoke
Hyde Iredell
Jackson
Johnston
Jones
Lee Lenoir
Lincoln McDowell
Macon
Madison Mar8n
Mecklenburg
Mitchell
Montgomery Moore
Nash
New Hanover
Northampton
Onslow
Orange
Pamlico
Pasquotank
Pender
Perquimans Person
Pic
Polk
Randolph
Richmond
Robeson
Rockingham
Rowan
Rutherford
Sampson
Scotland
Stanly
Stokes Surry
Swain
Transylvania
Tyrrell
Union
Vance
Wake
Warren
Washington
Watauga
Wayne
Wilkes
Wilson
Yadkin
Yancey
Kudzu bug in North Carolina, 2010-2011
Distribution map courtesy of W. Gardner, Univ. of Georgia, edited by Dominic Reisig, NCSU
Confirmed in 2010
Confirmed in 2011
Confirmed in soybean in 2011
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Soybean grain yield in untreated and season‐long control of M. cribraria using Endigo insec8cide in 6 trials in
Georgia, 2010
*
‐4.52 Bu/acre (‐18.4%) Range 11‐23%
* Means significantly different, F test, α = 0.05
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QuesBons?