Fusarium Head Blight Alert

FHBWheatHeadsFrom Gary Bergstrom, Extension Plant Pathologist, Cornell University

Fusarium head blight commentary, May 21, 2015:

Many winter wheat and malting barley fields in New York State are approaching head emergence. The next 10 days will be critical for farmers making fungicide spray decisions for suppression of Fusarium head blight (FHB) and protection of flag leaves from foliar diseases.  The triazole products Caramba and Prosaro are the most effective fungicides for suppression of FHB and deoxynivalenol (DON) toxin contamination when applied at wheat flowering (emergence of anthers on heads) or at full head emergence in barley (anthers begin to appear on barley before heads emerge from the boot).  A flowering application of triazole fungicide should be based on Fusarium head blight (FHB) risk as well as the risks of powdery mildew, rust, and fungal leaf blotches in the upper canopy based on scouting of individual fields.  There is an application window of approximately 6 days from the beginning of flowering in which reasonable FHB suppression can be expected.  Fungicide products containing strobilurins should not be applied to headed wheat or barley as they may result in increased levels of DON in grain. While the current risk of FHB epidemics is low to moderate over most of the state, that risk could increase next week.   Check the Fusarium Risk Assessment Tool (http://www.wheatscab.psu.edu/) and your local weather forecast frequently as your crop approaches flowering.

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I will be providing weekly New York commentaries on FHB risk through June.  You can subscribe to receive FHB Alerts directly to your Cell Phone (http://scabusa.org/fhb_alert.php).  You can select to receive alerts as 1) Text Message Alerts, 2) Email Alerts, or 3) both Text and Email Alerts.  To receive alerts for New York, select the Northern Soft Winter Wheat option which provides alerts for MI, NY, WI and VT.

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