[Fhb-update_cgp] FHB Update from OK, 05/19/16

[FHB Update - Central GP, Hard Winter Wheat]

This past week (Monday & Tuesday) I visited the Dr. Raymond Sidwell Station
near Lahoma (Major County), and the variety trials near Cherokee (Alfalfa
County) and Alva (Woods County) on my way to field days in the panhandle
near Balko and Hooker (Texas and Beaver Counties). Except for in the
panhandle, wheat foliage is pretty much done for in Oklahoma. Wheat in the
panhandle was mostly in the kernel forming stage. Diseases observed on the
trip to the panhandle included stripe rust (some still actively
sporulating), wheat streak mosaic/high plains, and barley yellow dwarf.
Samples submitted to the Plant Disease and Insect Diagnostic Lab also have
tested positive for these viruses. As indicated in the 14-May update,
take-all/root rot has been confirmed from a couple samples received from
across central and northern Oklahoma. Take-all has been confirmed, but it
appears another root rot also may be involved. Jen Olson in the PDIDL is
making isolations to help resolve exactly what is involved in terms of root
rot disease. In south-central Oklahoma Aaron Henson (Tillman County Extn
Educator) indicated to me that wheat is variable in maturity but he
estimates that some harvesting should begin in 1.5 to 2 weeks. Heath Sanders
(Area Extn Agron Spclt located in southwestern OK) indicated much the same
– especially if the cool/wet weather becomes more seasonally hot and dry.

--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 http://www.scabusa.org