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2022 National Fusarium Head Blight Forum


FHB Management (MGMT)

Poster # 102

Fusarium Head Blight Management Coordinated Project: Integrated Management Trials 2022

Authors & Affiliations:

Wanderson B. Moraes1, Gary Bergstrom2, Kaitlyn Bissonnette22, Kira Bowen5, Carl Bradley4, Emmanuel Byamukama6, Martin Chilvers11, Alyssa Collins23, Christina Cowger8, Heather Darby13, Erick DeWolf21, Ruth Dill Macky12, Paul Esker7, Andrew Friskop9, Nathan Kleczewski3, Alyssa Koehler14, David Langston Jr.16, Laurence Madden1, Juliet Marshall15, Hillary Mehl16, Martin NegelKirk11, Nidhi Rawat10, Damon Smith18, Darcy Telenko19, Stephen Wegulo24, Heather Young-Kelly20 and Pierce A Paul1
1. The Ohio State University/OARDC, Wooster 44691
2. Cornell University, Ithaca, NY 14853
3. University of Illinois, Urbana, IL 61801
4. University of Kentucky, Princeton, KY 42445
5. Auburn University, Auburn, AL 36849
6. South Dakota State University, Brookings, SD 57007
7. The Pennsylvania State University, University Park, PA 16802
8. North Carolina State University/USDA-ARS, Raleigh, NC 27695
9. North Dakota State University, Fargo, ND 58102
10. University of Maryland, College Park, MD 20742
11. Michigan State University, East Lansing, MI 48824
12. University of Minnesota, St. Paul, MN 55108
13. University of Vermont and State Agricultural College, St. Albans, VT 05478
14. The University of Delaware, Georgetown, DE 19947
15. University of Idaho, Aberdeen, ID 83210
16. Virginia Tech, Suffolk, VA 23437
17. University of Nebraska-Lincoln, Lincoln, NE 68588
18. University of Wisconsin-Madison, Madison, WI 53706
19. Purdue University, West Lafayette, IN 47907
20. The University of Tennessee at Knoxville, Jackson, TN 38301
21. Kansas State University, Manhattan, KS 66506
22. University of Missouri, Columbia, MO 65211
23. The Pennsylvania State University, Manheim, PA 17545
24. University of Nebraska, Lincoln, NE 68583-0722
*Corresponding Author: Pierce A. Paul, paul.661@osu.edu

Corresponding Author:

Wanderson Bucker Moraes
buckermoraes.1@osu.edu

Abstract:

The demethylation inhibitors (DMI) prothioconazole, metconazole, and tebuconazole are three of the most effective fungicide active ingredients (AI) for Fusarium head blight (FHB) and deoxynivalenol (DON) control in wheat and barley. Given that Prosaro, a premix of two of these AIs (tebuconazole + prothioconazole), is one of the most consistently effective fungicides against FHB and DON, a logical question is whether other mixtures of AIs will be just as or more effective than Prosaro. Several new mixtures of DMI AIs or DMI + SDHI (Succinate Dehydrogenase Inhibitor) AIs are now being marketed for FHB and DON management. These include Sphaerex, a premix of metconazole and prothioconazole, Prosaro Pro, a premix of tebuconazole, prothioconazole, and the SDHI Fluopyram, and Miravis® Ace, a premix of the DMI Propiconazole and the SDHI Pydiflumetofen. More information is needed on the overall efficacy of these new products when used alone or in combination with genetic resistance. Therefore, in 2022, field experiments were conducted in several US wheat-growing states, representing all major grain market classes and different production regions to evaluate the integrated effects of these new fungicide mixtures and genetic resistance on FHB and DON. Separate replicated plots of susceptible (S), moderately susceptible (MS), or moderately resistant (MR) cultivars were treated with Prosaro, Miravis Ace, Prosaro Pro, or Sphaerex at Feekes 10.5.1 or left untreated, and subsequently inoculated with spores of Fusarium graminearum. Percent control (C) was estimated for FHB index (IND) and DON for each cultivar x fungicide program combination relative to the non-treated susceptible check S_UT). Mean IND and DON in S_UT ranged from 0 to 61% and 0 to 22 ppm, respectively. Averaged across environments, C for IND and DON were highest when the fungicide treatments were applied to an MR cultivar. Across the tested fungicide programs, C for DON ranged from 87 to 93% on MR and 77 to 87% on MS cultivars, compared to 63 to 74% on S cultivars. Finding from this study will provide stakeholders with useful information regarding the efficacy of the new fungicide mixtures relative to the industry standards when used as part of integrated management programs to control FHB and DON. The experiments will be repeated in 2023, and all data will be analyzed to formally quantify management combination effects.

ACKNOWLEDGEMENTS AND DISCLAIMER: This material is based upon work supported by the U.S. Department of Agriculture, under Agreement Nos. 59-0206-8-195, 59-0206-0-126; 59-0206-9-120, 59-0206-0-125; 59-0206-6-008, 59-0206-0-153; 59-0206-5-007, 58-6070-9-019, 59-0206-0-184; 59-0206-8-192, 59-0206-0-115; 59-0206-8-189, 59-0206-0-138; 59-0206-5-005, 59-0206-9-122, 59-0206-0-139; 59-0206-8-190, 59-0206-0-141; 59-0206-6-015, 59-0206-0-155; 59-0206-4-016, 59-0206-9-117, 59-0206-0-132; 59-0206-8-210, 59-0206-0-140; 59-0206-8-199, 59-0206-0-122; 59-0206-8-211, 59-0206-0-144; 59-0206-0-173; 59-0206-0-188; 58-2050-8-013, 59-0206-0-175; 59-0206-6-010; 59-0206-8-189; 59-0206-0-179; 59-0206-6-012, 59-0206-0-189; 59-0206-9-123, 59-0206-0-118; 59-0206-6-014, 59-0206-0-191; 59-0206-9-009, 59-0206-0-185; and 59-0206-8-187, 59-0206-0-131. This is a cooperative project with the U.S. Wheat & Barley Scab Initiative. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the authors and do not necessarily reflect the view of the U.S. Department of Agriculture.

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