[Fhb-update_cgp] FHB Update from OK, 04/13/18

[FHB Update - Central GP, Hard Winter Wheat]

Wheat in central Oklahoma was reported at growth stages 8-9 (flag leaf
emerging to flag leaf fully emerged). In northern Oklahoma, wheat was
extremely variable with growth stages from 2-8 (tillering to flag leaf
emerging) being reported. Powdery mildew continued to be the primary wheat
foliar disease this past week in Oklahoma. Around Stillwater, I have seen
powdery mildew on the lower and mid-leaves with severities reaching 90% on
the lower leaves. A preponderance of powdery mildew on lower to mid leaves
also was indicated across Oklahoma by reporting from Extension Educators.
There was one report of stripe rust in south central Oklahoma from near
Ardmore, OK. This report indicated both active stripe rust and the dormant
(telial) spore stage of stripe rust. The only other observation this week
has been “spots” of barley yellow dwarf as reported last week. However,
after the recent freeze events, these barley yellow dwarf “spots” are
more difficult to discern because there is widespread burning of leaf tips
from the freeze, which has a masking effect.

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

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