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Wheat Foliar Disease Update

1.  Wheat Leaf rust. Leaf rust (Puccinia triticina = syn P. recondita) has been reported and identified in commercial wheat fields in Mitchell County and in Randolph County.  It is early on its arrival, but favorable environmental conditions for leaf rust development are developing or are now in place in the state; therefore wheat field scouting and monitoring should be implemented at this time. If leaf rust is present in your field, this warrants a fungicide application. Options include:

metconazole (Caramba)
propiconazole (Tilt, Propimax)
prothioconazole (Proline)
prothioconazole + tebuconazole (Prosaro)
tebuconazole-containing products (Folicur, others)

azoxystrobin (Quadris)
fluxastrobin (Evito)
picoxystrobin (Aproach)
pyraclostrobin (Headline)

Mixed mode of action
fluoxapyroxad + pyraclostrobin (Priaxor)
flutriafol + fluoxastrobin (Fortix)
propiconazole + azoxystrobin (Quilt, QuiltXcel)
propiconazole + trifloxystrobin (Stratego)
prothioconazole + trifloxystrobin (Stratego YLD)
pyraclostrobin + metconazole (Twinline)
tebuconazole + trifloxystrobin (Absolute)
tebuconazole + azoxystrobin (Custodia)

When leaf rust has become established in a field, triazole fungicides tend to be most effective. Strobilurins have a more preventive activity and tend to be weaker if rust already in the field.