Testing the Efficacy of a Newly Released Fungicide, Sphaerex, for Control of Fusarium Head Blight in Wheat

Author:

Chhabra Bhavit1,Livesay Janelle1,Thrasu Saijagruti1,Cheng Victoria1,Crank Joesph1,Thorne Louis1,Koehler Alyssa2,Dong Yanhong3,Rawat Nidhi1ORCID

Affiliation:

1. Department of Plant Science and Landscape Architecture, University of Maryland, College Park, MD 20742

2. Department of Plant and Soil Sciences, University of Delaware, Newark, DE 19716

3. Department of Plant Pathology, University of Minnesota, St. Paul, MN 55108

Abstract

Fusarium head blight (FHB) is a destructive disease of wheat and other small-grain cereals. FHB causes reduction in crop yield due to premature bleaching of spikes. Additionally, it deteriorates the crop quality due to production of mycotoxins. An integrated management strategy is needed to effectively manage this disease. One of the most important strategies in the FHB management toolbox is chemical control. Fungicides start losing their efficacy over time due to the development of fungicide resistance in the pathogens. This necessitates the development and testing of new fungicides with multiple active ingredients or modes of action. In this 3-year study, we evaluated the effectiveness of a new fungicide with multiple active ingredients, Sphaerex (a proprietary mix of metconazole and prothioconazole), in an FHB-susceptible soft red winter wheat cultivar, Shirley, in the eastern United States. Sphaerex provided significantly better control over untreated plots for FHB incidence, FHB severity, and deoxynivalenol (DON) content across all 3 years. The level of control of FHB and DON by Sphaerex was found to be similar to that provided by other standard FHB fungicides. The yield of the fungicide-treated plots was statistically similar to that of the untreated plots.

Funder

USDA Agricultural Research Service

Maryland Agricultural Experiment Station

Maryland Grain Producers and Utilization Board

Maryland Crop Improvement Association

Publisher

Scientific Societies

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