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Kochia
Kochia is an exceptionally competitive weed and a few uncontrolled plants can cause severe yield losses. Use proper herbicide rates and spray volumes for thorough coverage. ALS herbicides provide good kochia control unless resistant populations are present. Tank-mixing ALS herbicides with other broadleaf herbicides with differing modes of action is required to reduce risk resistant kochia. Starane provides excellent control of ALS, triazine, and dicamba resistant kochia. Banvel/SGF/Clarity plus MCPA amine at 0.5 pt/A Clarity or 1 pt/A Banvel/SGF gives good kochia control. Bromoxynil plus MCPA also gives good control of kochia, but plants should be small and spray coverage good. In many fields, 2,4-D and MCPA no longer control kochia due to repeated use and near eradication of susceptible kochia biotypes. 2,4-D and MCPA do not translocate readily in kochia. Treatment should be to small plants (less than 3 inches tall) and high spray volumes should be used to thoroughly wet kochia foliage. Tordon is not effective on kochia.
For more information see the "North Dakota Weed Control Guide" at http://www.ag.ndsu.nodak.edu/weeds/w253/w253w.htm
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