Additionally, mowed plants may survive as short-lived perennials into the next year and produce a greater seed crop than unmowed plants. Repeated mowing of regrowth in the bud stage will reduce the secondary seed crop. It is critical to clean any mowing equipment after working in infested areas to prevent spread to new areas. One of the most important avenues for livestock poisoning is through ingestion of contaminated hay. Tansy ragwort patches should be avoided during hay cutting operations.
Hand pulling is effective on small infestations.
It is important to remove the root system to prevent regrowth from the crown and root buds of the plant. If plants have set seed, they should be carefully removed, bagged, and burned. Repeated tillage is an effective method for tansy ragwort control, however, tansy ragwort is generally not a problem in areas where tillage can be used. Regeneration of plants may occur from severed roots and crowns and tillage equipment should be cleaned after being used in infested areas. Tansy ragwort is one of the best examples of effective classical biological control.