[Fhb-update_cgp] FHB Update from OK, 05/03/14

[FHB Update - Central GP, Hard Winter Wheat]

Wheat around Stillwater is mostly at GS 10.5.1 (start of flowering) and is
looking dry. With temps forecast in the upper 90s for the next 3-4 days and
no rain, conditions will continue to deteriorate. Areas in other parts of
the state are worse, with only a few areas better.

This past week I traveled from to southwestern OK stopping at numerous
fields along the way as well as the variety trials or demonstrations at
Kingfisher (60 miles southwest of Stillwater), Granite (southwestern corner
of OK) and El Reno (20 miles west of OKC). Typically wheat was at my knee
height or shorter and thin. I saw no foliar diseases, but did find several
locations where I believe wheat streak mosaic and/or high plains disease was
present. Samples are being evaluated to confirm, but samples processed by
the Diagnostic Lab this past week from the panhandle and from central OK
would support this (i.e., positive for Wheat streak mosaic virus and/or High
plains virus). I also have noted symptoms of barley yellow dwarf in my
trials around Stillwater, but no stunting is associated with these symptoms
most likely indicating a spring infection. I did have a report from Roger
Musick in central Oklahoma that he found a high incidence of tan spot and
light leaf rust in a no-till wheat field under pivot irrigation. That is the
only confirmed report of foliar disease I have received.


--Bob Hunger, Extension Plant Pathologist, Oklahoma State University

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