This strategy may be difficult to implement due to limited entry into wet fields. Mowing will reduce, but not eliminate seed production. The optimal time for mowing is during the early flowering period, before viable seed are produced. Mowing should not be done after seed are produced, as this may increase dispersal. Small infestations may also be hand pulled.
Most plants have a shallow taproot and can be removed without great difficulty.
There are currently no reported cases of herbicide resistance in blue mustard. However, chlorsulfuron resistance has been detected in other members of the mustard family. The low labeled rates of 2,4-D amine are generally ineffective against blue mustard and may select for it by eliminating competition from other broadleaf weeds. Most herbicide treatments work best when blue mustard is in the rosette stage, and control is decreased after bolting occurs. Table 1 provides the basic herbicide information for chemical control of blue mustard in California.