[Fhb-update_cgp] FHB Update from OK, 05/18/13

[FHB Update - Central GP, Hard Winter Wheat]

Wheat in southern/southwestern Oklahoma is maturing and will speed up with
the warmer (>90 F) over the last couple of days. In central Oklahoma, around
Stillwater and to the north, wheat is just finishing or has just past
flowering and kernel development is starting. As you head to northwest
Oklahoma, wheat also is in late flowering or has just finished flowering.

Disease-wise, not a lot changed over the past week in Oklahoma. Leaf rust
remained practically absent although infections in the 15-40S range were
observed in Jagalene (or Jagger) guard rows in breeder plots at Stillwater.
Stripe rust is slightly more prevalent with “hot spots” being observed
around Stillwater and occasional “stripes” (but not hot spots) were
noted west of Enid, north of Ponca City, and north of Stillwater. Leaf
spotting diseases, barley yellow dwarf, and wheat streak mosaic (WSM) are
the most commonly observed diseases in samples seen at field days and
submitted to the Plant Disease and Insect Diagnostic Clinic. This past week
a few samples also tested positive for High plains virus.


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

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