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2022 National Fusarium Head Blight Forum


FHB Management (MGMT)

Poster # 103

Fusarium Head Blight Management Coordinated Project: Uniform Fungicide 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:

Sphaerex and Prosaro Pro were recently registered for use in wheat for Fusarium head blight (FHB) and deoxynivalenol (DON) management. However, it is unclear whether these new fungicides will be just as effective as or more effective than the current industry standards Prosaro and Caramba, and Miravis Ace against FHB and DON. Field experiments were conducted in multiple US wheat-growing states in 2022 to compare the efficacy of Prosaro Pro and Sphaerex to that of Prosaro, Caramba, and Miravis Ace. Separate replicated plots of susceptible cultivars were subjected to the different fungicide programs and then artificially inoculated with spores of F. graminearum. The fungicide programs consisted of a non-treated check (CK), or an application of Prosaro (I), Caramba (II), Miravis Ace (III), Prosaro Pro (IV), or Sphaerex (V) at anthesis, or Miravis Ace at anthesis followed by an application of Prosaro Pro (VI), Sphaerex (VII), or Tebuconazole (VIII) at 4-6 days after anthesis. FHB index (IND) was assessed, and grain samples were tested for DON. Percent control (C) was estimated for IND and DON for each fungicide programs relative to CK. Mean IND and DON in the checks across environments ranged from 1 to 42% and 1 to 22 ppm, respectively. Across environments and fungicides, efficacy in terms of C ranged from 68 to 95% for IND and 54 to 86% for DON. The double-application treatments (VI, VII, and VIII) were the most effective of all tested fungicide programs. Averaged across environments, C for IND was 95% for VI, 95% for VII, and 93% for VIII. Similarly, C for DON contamination of grain was 83, 86, and 72% for VI, VII and VIII, respectively. Based on these results, there is evidence suggesting that the combination of an anthesis application of Miravis Ace followed by a “late” application of one of the other tested fungicides can be more effective at reducing FHB and DON than an anthesis-only application of any of the tested fungicides. Finding from this study will provide stakeholders with information regarding the efficacy of the new fungicides relative to the industry standards, as well as the efficacy of two-treatment fungicide programs against FHB and DON. Further analyses will be conducted to formally quantify efficacy and determine the additivity of AI mixtures and sequentially applied fungicide treatments.

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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