A study was performed to assess the use of perennial native grasses in the control of leafy spurge and
Canada thistle and also to evaluate the effects of herbicides applied during the fall to leafy spurge crown
buds. As part of an integrated vegetation management program, grass treatments containing the native
prairie grass little bluestem established well and were effective at reducing the cover of leafy spurge.
Paramount to the success of using native grass species is getting adequate grass establishment which
necessitates the careful selection of grass species adapted to the specific site conditions. A fall
application of the herbicide picloram at 0.5 and 1.0 lb ai/acre was very effective at controlling leafy
spurge and may be mediated via the direct absorption of picloram by the elongated crown buds at this
time. The report contains an extensive literature review of the biology and weed control efforts of both
leafy spurge and Canada thistle.
Biesboer, David D.; Darveaux, Bettina; Koukkari, Willard L..
Controlling leafy spurge and Canada thistle by competitive species.
Retrieved from the University of Minnesota Digital Conservancy,
Content distributed via the University of Minnesota's Digital Conservancy may be subject to additional license and use restrictions applied by the depositor.