Controlling Horseweed in Wheat before Soybean - March 23, 2010
[Title Slide – Controlling Horseweed in Wheat before Soybean. With Dr. Bob Scott, Extension Weed Specialist. Your Arkansas Soybean Podcast, University of Arkansas Division of Agriculture, Arkansas Soybean Promotion Board]
[Dr. Bob Scott] In addition to ryegrass there are a number of broadleaf weeds that infest Arkansas wheat. One that I’m primarily concerned about is horseweed. The reason I’m concerned about it is not so much for the wheat production, [Picture of a field with horseweed infestation] it takes a tremendous amount of horseweed to actually impact wheat production in Arkansas. [Picture of wheat plots] However, most of our horseweed in the state is resistant to glyphosate [Map of the state of Arkansas showing counties where herbicide resistant horseweed is found] and a lot of our wheat acres are followed by round-up ready soybeans. So if you intend to grow round-up ready soybeans behind wheat in a double crop, [Dr. Bob Scott] it becomes very important to control the horseweed in the wheat so that it doesn't interfere with soybeans.
[Picture of emerging wheat] One of the best options for horseweed control can be applied once the wheat is finished tillering but prior to joint elongation. [Drawing showing a mixing tank with 1 1/2 pints of 2,4-D and 1/2 ounce of Harmony-Extra being poured into the tank.] This application is a pint and a half of 2, 4-D, tank mixed with a half ounce of Harmony-Extra. And we have observed over ninety percent control of horseweed with this program.
[Narrator] Your Arkansas Soybean Podcast is a production of the University of Arkansas Division of Agriculture and was funded in part by the Arkansas Soybean Promotion Board. For more information on soybean farming in Arkansas contact your local county Extension Office.
[Title slide - For more information contact your local county Extension office. Your Arkansas Soybean Podcast, University of Arkansas Division of Agriculture, Arkansas Soybean Promotion Board]