[Fhb-update_ma] FHB Update for PA, 5/6/2024
FHB Updates - Mid Atlantic SWW Region
fhb-update_ma at scabusa.org
Mon May 6 19:53:50 UTC 2024
Scab infection risk is gradually increasing this week across the entire west and the southeastern portion of PA as a result of increased precipitation and humidity. Most wheat is only beginning to head out, but if your barley or wheat in high risk areas is heading and approaching flowering, stay alert and consider a fungicide application when the weather allows. Miravis Ace, Prosaro, Prosaro Pro, and Sphaerex all provide very good scab suppression. The Miravis Ace label allows for earlier application than other fungicides, but "best results are still achieved when application is timed after full heading in barley and flowering in wheat". If weather conditions prevent fungicide application at ideal timing, an application as soon as conditions allow will still be quite effective in reducing scab and DON production. Follow labels to determine post-harvest interval constraints for the fungicide you choose. Spray nozzles should be angled at 30 deg down from horizontal, toward the grai
n heads, using forward- and backward-mounted nozzles or nozzles with a two-directional spray, such as Twinjet nozzles. Additionally, a fungicide treatment at heading using any of these products will also give you excellent control of most leaf diseases as well.
--Alyssa A. Collins, Associate Professor, Plant Pathology and Environmental Microbiology, The Pennsylvania State University
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