By Blake Jackson
Pennsylvania wheat producers are urged to heighten vigilance against head scab (Fusarium head blight) as crop development progresses towards heading. Extension specialists Alyssa Collins and Paul Esker emphasize the critical window for fungicide application: early- to mid-flowering, which typically occurs 3-5 days after heading commences.
High-risk zones for susceptible wheat varieties have been identified within the state. Producers can readily assess their specific risk level using the Fusarium Risk Tool.
Several fungicide options demonstrate excellent efficacy in suppressing head scab: Miravis Ace, Prosaro and Prosaro Pro, and Sphaerex. While the Miravis Ace label permits earlier application, all options achieve optimal results when applied post-full heading in barley and during wheat flowering.
Even if unfavorable weather conditions initially hinder fungicide application, subsequent treatment upon favorable conditions remains highly effective in mitigating head scab and deoxynivalenol (DON) production. Always refer to product labels for post-harvest interval requirements.
To ensure optimal application, utilize nozzles angled 30 degrees downward towards the developing grain heads. Forward-mounted, rear-mounted, or nozzles with bi-directional spray capability (e.g., Twinjet) are recommended for comprehensive coverage. Additionally, a fungicide application during heading offers the added benefit of effectively controlling most prevalent leaf diseases.
Photo Credit: gettyimages-ygrek
Categories: Pennsylvania, Crops, Wheat