In the News - February 2008
Spring temps make weed control tricky for Arkansas wheat farmers
LITTLE ROCK - Applying weed controls in the spring can be tricky, said Dr.
Bob Scott, weed scientist with the University of Arkansas Cooperative Extension
Service.
Many Arkansas wheat growers who would normally apply herbicides in the fall
had to shift the activity to spring due to wet weather, late planted wheat and
late emerging ryegrass.
Scott said cold spring temperatures can be trouble.
"When it gets cold," he said, "many enzyme-inhibiting herbicides, such as
Osprey, don’t work as well. It’s better to wait until temperatures are above 55
degrees for two or three days before and after application."
Osprey’s label warns that injury may occur if nitrogen fertilizer is applied
within 14 days of an Osprey application, Scott said.
Osprey at the full rate is effective on larger ryegrass and does a fair job
on bluegrass, many broadleaves and vetch in late January and early February,
Scott said. It can be tank-mixed with Harmony Extra for garlic.
Axial or Hoelon is a good option for spring ryegrass control if the ryegrass
isn’t Hoelon-resistant. Use the full labeled rate of either herbicide for best
results, Scott recommended, but don’t tank-mix broadleaf herbicide with Hoelon.
Wild buckwheat and vetch will cause major harvest problems. Harmony
Extra is the industry standard for garlic and onion and many of these other broadleaves.
For more information about weeds, fertilizer and wheat production, contact
your county extension agent or visit www.uaex.edu and
select Agriculture, then Wheat. The Cooperative Extension Service is part of the
U of A Division of Agriculture.
February 22, 2008
Media Contact: Lamar James
Extension Communications Specialists
U of A Division of Agriculture
Cooperative Extension Service
(501) 671-2187 or (501) 753-0207
ljames@uaex.edu
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