[Fhb-update_ma] FHB Update from DE, 05/05/17

FHB Updates - Mid Atlantic SWW Region fhb-update_ma at scabusa.org
Fri May 5 12:28:32 EDT 2017


Rains will continue to keep in elevated risk levels for FHB in varieties
currently flowering (Kent Co Delaware and similar latitudes in Maryland),
and slightly North. Growers with wheat flowering at this time may consider
an application of a FHB fungicide (Caramba, Prosaro, Proline). Applications
are most efficacious when applications occur from the start of flowering
(50% of MAIN tillers with anthers extruded), through 6 days from the start
of flowering. Efficacy is significantly reduced when applied outside of this
window. Apply in 5 gal/A air and 15 gal/A by ground, 300-350 um droplet
size, with nozzles at least angled forwards 30 degrees. Wheat not yet
flowering is not at risk. Continue to check your wheat and this page for
updates. Rain has pushed a large portion of the region into a severe level
of risk for FHB if that wheat is currently flowering. Most of the wheat in S
Delaware and S Maryland likely started to flower late last week and is at
elevated risk for FHB, especially if a suceptible variety was planted.
Growers with wheat flowering at this time are advised to make an application
of a FHB fungicide (Caramba, Prosaro, Proline). Applications are most
efficacious when applications occur from the start of flowering, through p
days from the start of flowering. Apply in 5 gal/A air and 15 gal/A by
ground, 300-350 um droplet size, with nozzles at least angled forwards 30
degrees. for more information follow this link:
http://extension.udel.edu/fieldcropdisease/2017/05/05/fungicide-application-window-for-fusarium-head-blight-suppression/

--Nathan Kleczewski, Extension Field Crop Plant Pathologist, University of
Delaware

For more details, go to the FHB Risk assessment tool at
http://www.wheatscab.psu.edu

For the latest news and updates from the U.S. Wheat & Barley Scab
Initiative, go to https://www.scabusa.org



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