Stem rust resistant Berberis, Mahoberberis and Mahonia list
Please note: Cultivars not included in this list should be assumed to be either susceptible or not yet cleared for distribution in the barberry protected areas.
Please read the complete regulation in Federal Register Vol 67, No. 36, February 22, 2002
Thirteen additional cultivars were added to the list in Federal Register Vol 71, No. 23, February 3, 2006.
Four additional cultivars were added to the list in Federal Register Vol 72, No. 112, June 12, 2007.
Twenty one additional cultivars were added to the list in Federal Register Vol 75, No. 100, May 25, 2010.
Four additional cultivars were added to the list in Federal Register Vol 75, No. 173, Sept. 8, 2010.
