Sheep grazing may also provide limited control of dyer's woad. Sheep readily consume top growth of woad until the flowering stage. Recent studies suggest that properly timed grazing, repeated several times per season may increase mortality and reduce reproductive performance when at least 60 percent of the plant is removed. Biological controls alone will not eradicate dyer's woad but may provide some control. Conclusions Early recognition and immediate treatment are the most important means of controlling dyer's woad.
Awareness is the best defense against future infestations.
The Dyer's Woad Awareness and Eradication Program was initiated by MSU in cooperation with the Montana Department of Agriculture to prevent further invasion of dyer's woad. This information is for educational purposes only. Reference to commercial products or trade names does not imply discrimination or endorsement by the Montana State University Extension Service. We encourage the use of this document for non-profit educational purposes. The programs of the MSU Extension Service are available to all people regardless of race, creed, color, sex, disability or national origin.