Fusarium head blight (FHB) is a serious disease of wheat andbarley that leads to significant economic losses and deterioratedgrain quality because of the associated mycotoxins. Genetic resistanceand use of fungicides are the methods used to controlFHB. However, in weather conditions conducive for FHB epidemics,higher levels of genetic resistance as well as greaterefficacy of fungicides are required to adequately control thisdisease. Due to the extensive use of a single mode of action formanagement of FHB, there is a need to diversify fungicides usedto lower the risk of resistance development in pathogen populations.In this 2-year study, we evaluated the performance of anew fungicide, Miravis Ace (a proprietary mix of pydiflumetofenand propiconazole active ingredients produced by Syngenta) forcontrolling FHB. It is a mix of succinate dehydrogenase inhibitorand demethylation inhibitor fungicides and can add diversity tothe fungicide toolkit for FHB management. The level of controlof FHB and deoxynivalenol (DON) achieved by spraying MiravisAce at anthesis (Feekes growth stage 10.5.1) was found to beequivalent to that provided by the currently recommendedproducts for managing FHB and reducing DON in wheat andbarley.
Bibliographical noteFunding Information:
Funding: Funding from U.S. Wheat and Barley Scab Initiative (Grants 59-0206-6-018 and 59-0206-4-023), Maryland Agricultural Experiment Station, Maryland Crop Improvement Association, and Maryland Grain Producers Utilization Board (Grants 2018397 and 2019332) is gratefully acknowledged.
- fungicide efficacy
- Fusarium head blight