Oklahoma State University's Dr. Bob Hunger, Extension Wheat Pathologist in the Department of Entomology & Plant Pathology has released his latest wheat disease findings- released via email on Thursday, May 19th.
"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."
Reports/excerpts of reports from other states:
Cereal Rust Bulletin from the Cereal Disease Lab in Minnesota; May 18, 2016: Highlights/reports in the Cereal Rust Bulletin include:
- Wheat stem rust was found in a nursery in south central Georgia.
- Wheat stripe is widespread in the U.S., now reported in 24 states.
- Oat crown rust has now been reported in Texas, Louisiana, Mississippi, Alabama and North Carolina.
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