[Fhb-update_ma] FHB Update from VA, 04/21/17

FHB Updates - Mid Atlantic SWW Region fhb-update_ma at scabusa.org
Fri Apr 21 17:30:52 EDT 2017


Wheat is beginning to flower throughout Virginia, so it is time to make
decisions about fungicide applications for both Fusarium head blight (FHB)
and to protect the flag leaf as the grains begin to form. Currently, the
risk for FHB is low in most parts of Virginia, even for susceptible
varieties. Rains are expected over the weekend, but dry weather over the
past several weeks has not favored spore production by the FHB fungus, so
risk of FHB infection is expected to remain low for wheat that is flowering
over the next week. However, now may still be the time to apply fungicides
for foliar diseases including stripe rust, powdery mildew, and leaf blotch.
The flag leaf must be protected during grain development to maximize yields.
Again, due to the dry weather some areas have very little disease, and
scouting is still recommended prior to making a fungicide application.
However, there have been numerous reports throughout the region of outbreaks
of stripe rust (especially on Shirley) and powdery mildew. Do NOT apply a
strobilurin or fungicide pre-mix containing a strobilurin after flag leaf
emergence (Feekes 9) since this can increase DON contamination in the grain.
Prosaro, Caramba, and Proline are the most effective products for reducing
FHB and DON contamination, and these fungicides will also control foliar
diseases such as leaf blotch, stripe and leaf rust, and powdery mildew. 

--Hillary Mehl, Extension Plant Pathologist, Virginia Tech

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



More information about the Fhb-update_ma mailing list