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Redroot Pigweed
Redroot pigweed control require higher rates of most herbicides than rates for control of wild mustard. Ally, Amber, Harmony Extra or Express give good control. Most ALS herbicides, Banvel/SGF/Clarity, 2,4-D, and Tordon plus 2,4-D at 0.75 pt/A also give good control. MCPA is not as effective as 2,4-D in controlling either pigweed. The esters of 2,4-D generally are more effective than the amines. Waterhemp, a related pigweed species has developed resistance to ALS herbicides. Geographic distribution has been primarily in the mid-west. However, reports in 1998 documented waterhemp in northern Minnesota and close to the Red River Valley. Refer to publications "Pigweed identification" from Kansas State University Ext. Service, (913) 532-5776, ($1.50) or "Waterhemp Management in Agronomic Crops" (No. X855) from University of Illinois Ext Service, (217) 333-0005 ($2.00),
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