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With sufficient disease, strobilurin-treated corn
generally suffers less yield-loss than Untreated.
But over-use contributes to
disease resistance.*
* http://www.frac.info/frac/publication/anhang/FRAC_Mono1_2007_100dpi.pdf (After clicking on this link, please scroll down to the 5th bullet point on page 5)
TM
Specialist Technical Group of CropLife International
PURPOSE: Provide fungicide resistance management guidelines to prolong effectiveness of "at risk" fungicides.
• Responsible for global fungicide resistance strategies for all Qo Inhibitor (QoI) Strobiluron-class fungicides.
Qol Inhibitor Working Group is a sub-committee of FRAC
QoI fungicides include: azoxystrobin, pyraclostrobin, trifloxystrobin• All 3 in same cross-resistance group & should be managed accordingly.Participating Committee Companies: BASF, Bayer, DuPont, Syngenta
ALL strobilurin fungicides considered HIGH RISK for fungal resistance*
http://www.frac.info/frac/publication/anhang/FRAC-Code-List2011-final.pdf (After clicking on this link, please scroll down to Page 4 and review FRAC Code 11 compounds)
• Block (wide area) applications of Strobi’s must only be made in mixture with a non-cross-resistant fungicide.
• Alternate strobi applications, whether solo or in mixture, in single or block treatments, with applications of effective fungicides from other cross-resistance groups.
• Limit the total number of strobi applications within a total disease management program, whether applied solo or in mixture with other fungicides.
General guidelines for use of Strobilurin fungicides:
http://www.frac.info/frac/publication/anhang/FRAC_Mono1_2007_100dpi.pdf (After clicking on this link, please scroll down to Page 42 for strobilurin-specific information)
Independent Contract Research – Small-block replicated trials: NOT sponsored by PHC
Propiconazole is an effective, non-cross resistant Foliar Fungicide for Control of Corn Disease
Means followed by same letter are not different.
Iowa State University: 2008 Mean disease rating (% of diseased leaf tissue) By hybrid & treatment, cross-trial summary.
http://masters.agron.iastate.edu/DB/CC/StefflCCProject.pdf
Propiconazole delivers Similar Disease Control
Across Hybrids
Similar Disease ControlMean disease rating (%)
Iowa State University: 2008 Mean disease rating (% of diseased leaf tissue) By location & treatment, cross-trial summary.
http://masters.agron.iastate.edu/DB/CC/StefflCCProject.pdf
Propiconazole also delivers Similar Disease Control
Across LOCATIONS
TM
8 Midwest locations (2007) -- Independent RCB Contract Research
Similar Disease Control Means Comparable Yields
Relatively Low-yielding Scenario
6.6 bu increase
5.8 bu increase
University of Nebraska: http://elkhorn.unl.edu/webvideoj/UserFiles/Image/PDF/Plantsc09-Jackson.pdf
Similar Disease Control Means Comparable Yields
Relatively High-yielding Scenario
Propiconazole defends against Gray Leaf Spot almost as effectively as a strobilurin, but with less
risk of disease-resistance.
TM
TM
Disease pressure varies throughout
the field.
High Pressure
Moderate Pressure
Low Pressure
Protect
Pro
tect
Prote
ct
PROMOTEPR
OM
OTE
PRO
MO
TE
Fungicides PROTECT yield.
ProAct® PROMOTES yield.
Because it’s a pure“Plant Health” strengthener.
• Registered with U. S. Environmental Protection Agency (EPA) as: N-Hibit HX-209, ProAct, and Employ
• 2nd generation of harpin-derived product
• Combination of active domains from 4 different native harpin proteins: HrpN, HrpW, HrpZ, and PopA
ProAct® = Harpin αβ Protein
Harpin αβ protein US-EPA Fact Sheet
Mode of Action: Harpin αβ does not act directly on disease organisms, nor does it permanently alter the DNA of treated plants. Instead, Harpin αβ activates a natural defense mechanism in plants, referred to as systemic acquired resistance (SAR). Harpin αβ and the Harpin protein registered in the year 2000 are structurally and functionally similar.
Harpin αβ protects against certain bacterial, viral, and fungal diseases; soil-borne pathogens; and harmful nematodes and insects. Harpin αβ protein also enhances plant growth and vigor, and increases the yield for a variety of crops, including vegetables, trees, and ornamentals.
Regulatory Information: The first pesticide product ProAct® (EPA Reg # 69834-5) containing Harpin αβ protein as an active ingredient was registered on February 9, 2005.
http://www.epa.gov/pesticides/biopesticides/ingredients/factsheets/factsheet_006506.htm
Schematic of Plant Response to
Harpin Protein Products
Harpin is a pure “Plant Health” Product. ALL it does is IMPROVE Plant Health.
ProAct®, Used alone, Increases Yields in Field Corn
2003 2004 2005 2006 2007 AVERAGE150
160
170
180
190
200ProAct at 0.5 oz/A
CONTROL +7 bu+7 bu
+8 bu+8 bu
Average Corn Yield (bu/A) by Year
+6 bu
+7 bu
6
# on bar = number of data points; includes replicated and commercial field trials
11 57 17 7 98
Primarily NCGA
Demos
Water Control Fungicide + NIS ProAct 0.5 oz/A + Fungicide + NIS
0
5
10
15
Gray Leaf Spot and Common Rust Severity on Ear Leaf (%)
A
C BC
8 replicates per site; treatments applied at VT; summary of all 7 trial locations (IA, IL-3, MN, and NE-2)
Means followed by same letter are not different, (Protected LSD, P=0.1).
Water Control Fungicide + NIS ProAct 0.5 oz/A + Fungicide + NIS
190
200
210
220
B B
A
Corn Yield (bu/A)
“ProAct + Strobi’s” increased Corn yields more than Strobi’s alone.
PHC-contracted Independent Small-block Research: 2009
Strobi @ 6 oz ProAct 0.5 oz + STROB. 6 oz
50%
60%
70%
80%
90%
100%
78%
96%
Strobi @ 6 oz ProAct 0.5 oz + STROB. 6 oz
100%
105%
110%
103.8%
105.7%
Average Yield as % of Control
UTC = 175 bu
8 reps per location; 15 locations; treated at VT; strobilurins applied with NIS 0.25% (v/v).
Success Rate (% Wins)
ProAct + Strobi increased the # of wins versus untreated controls more than Strobi’s alone
10 bushel increase versus
untreated6.7 bushel increase versus
untreated
PHC-contracted Independent Small-block Research: 2009 and 2010
With sufficient disease, strobilurin-treated corn
generally suffers less yield-loss than Untreated.
But over-use contributes to
disease resistance.*
* http://www.frac.info/frac/publication/anhang/FRAC_Mono1_2007_100dpi.pdf (After clicking on this link, please scroll down to the 5th bullet point on page 5)
TM
Can “ProAct® + Propiconazole”
be substituted for strobilurin fungicides, as an aid in the
battle to reduce the likelihood of disease resistance to strobi-
class chemistry?(Without giving up any yield in the process?)
Treatments Yield (bu/A)* Bu Diff. from UTC
Success Rate (% wins)
Untreated Control (Sprayed with Water) 169.99 a - N/A
Propiconazole @ 4 oz + NIS (@ 2 weeks before VT) 171.34 a 1.35 56%
Propiconazole @ 4 oz + ProAct @ .5 oz + NIS (@ 2 weeks before VT) 168.14 a -1.85 11%
Propiconazole @ 4 oz + NIS (@ VT) 173.92 a 3.93 56%
ProAct @ 0.5 oz + NIS (@ VT) 175.01 a 5.02 78%
Propiconazole @ 4 oz + ProAct @ 0.5 oz + NIS (@ VT) 178.88 a 8.89 89%ProAct @ 0.5 oz + NIS (@ V5) fb Propiconazole @4 oz + ProAct @ .5 oz + NIS (@ VT) 179.86 a 9.87 89%
Headline® @ 6 oz + NIS (@ VT) 178.10 a 8.11 67%
Headline AMP @ 10.6 oz + NIS (@ VT) 177.59 a 7.60 89%
Quilt® @ 7 oz + NIS (@ VT) 176.86 a 6.87 89%
Quadris® @ 6 oz + NIS at V5 fb Quilt @ 7 oz + NIS (@ VT) 172.45 a 2.46 44%
CORN YIELD: (n=9 locations, sites with light to high disease levels)
8 reps per location. VT=tasseling. *Mean separation not attempted if Treatment x Location interaction term significant. When letters are presented, means followed by the same letter are not statistically different (Protected LSD, P = 0.1); Values calculated with ARM ST.
ProAct® + Propiconazole increased Corn YIELDS and SUCCESS RATES
as much or more than Strobi’s alonePHC-contracted Independent Small-block Research: 2011
Each registered trademark shown on this page is the property of its owner
Comparable corn yields without resistance pressure
on strobilurin-class fungicides
Each treatment replicated at least 3 times via field-strips at each location.Each registered trademark shown on this page is the property of its owner
Trial ID County Untreated Headline® AMP ProAct with Propiconazole
ST2011303A Webster 209.1 211.4 215.0
ST2011362A Kossuth 198.5 202.6 209.4
ST2011369A Humboldt 194.4 198.0 193.6
ST2011363A Kossuth 185.3 185.1 192.6
ST2011368A Boone 191.2 193.9 189.9
ST2011357A Story 184.6 186.6 184.3
ST2011359A Polk 176.2 173.3 173.4
ST2011356A Polk 162.5 172.2 169.7
Average 187.7 190.4 191.0
ISA-OFN-Managed, Famer-recorded average yields in bu/ac: 2011
• ProAct alone is NOT as effective as strobies or propiconazole at protecting corn from disease-induced yield losses.
• Tank-mixing ProAct with propiconazole increases likelihood of higher yields following application.
• ProAct-treated corn usually yields more than untreated whether disease is present or not.
The use of ProAct & Propiconazole, used in lieu of an application of a strobilurin fungicide can be an effective tool in the battle against the development of resistance to strobilurin class chemistry.
RECOMMENDATIONS
If Gray Leaf Spot pressure is light-to- moderate and unevenly distributed
across area to be treated, apply a tank-mix of ProAct + propiconazole.
If scouting reveals widespread Gray Leaf Spot infection, apply a
strobiluron + triazole combination fungicide product.
TM
ProAct® logo, Plant Health Care, Inc.® logo Save the Strobies™ and Strobie characters are trademarks of Plant Health Care, Inc., Pittsburgh, PA. All other trademarks are the property of their respective owner.
www.savethestrobies.com