Common Name: Japanese Barberry
Latin Name: Berberis thunbergii DC.
File #: MDARA00028JABAR_2_24_2014
Review Entity | Outcome
Yes, forms dense thickets, according to studies on the Eastern seaboard (Silander and Klepis, 1999, Harrington et. al., 2006) and MN DNR observations in MN. No mention found of allelopathy.
Brand, M.H. 2013. Barberry Cultivar Fruit and Seed Production – Findings from our 10+ year study. Connecticut Nursery and Landscape Magazine. May 2013.
Brand, M. H., J. M. Lehrer and J. D. Lubell. 2012. Fecundity of Japanese Barberry (Berberis thunbergii) Cultivars and Their Ability to Invade a Deciduous Woodland. Invasive Plant Science and Management 5(4): 464-476.
Cassidy, T. M., J. H. Fownes, and R. A. Harrington. 2004. Nitrogen limits an invasive perennial shrub in forest understory. Biological Invasions 6: 113–121.
Connolly, B. A., G. J. Anderson and M. H. Brand. April 2013. Occurrence and Fertility of Feral Hybrid Barberry Berberis × ottawensis (Berberidaceae) in Connecticut and Massachusetts. Rhodora- Journal of the New England Botanical Club 115 (962): 121-132.
Czarapata, E. J. 2005. Invasive plants of the Upper Midwest. The University of Wisconsin Press, Madison, WI.
Ehrenfeld, J.G. 1997. Invasion of deciduous forest preserves in the New York metropolitan region by Japanese Barberry (Berberis thunbergii DC.) Journal of the Torrey Botanical Society 124: 210-215.
Ehrenfeld, J. G. 1999. Structure and dynamics of populations of Japanese barberry (Berberis thunbergii DC) in deciduous forests of New Jersey. Biological Invasions 1: 203-213.
Ehrenfeld, J.G. 2004. Implications of invasive species for belowground community and nutrient processes. Weed Technology 18: 1232-1235.
Ehrenfeld, J. G. 2009. Extensive defoliation of Japanese barberry (Berberis thunbergii DC) in New Jersey by a native moth, Coryphista meadii. Natural Areas Journal 29: 57-63.
Ehrenfeld, J.G., P. Kourtev, W. Huang. 2001. Changes in soil functions following invasions of exotic understory plants in deciduous forests. Ecological Applications 11: 1287-1300.
Elias, S. P., C. B. Lubelczyk, P. W. Rand, E. H. LaCombe, M. S. Holman, and R. P. Smith, Jr. 2006. Deer browse resistant exotic-invasive understory: an indicator of elevated human risk of exposure to Ixodes scapularis (Acari: Ixodidae) in southern coastal Maine woodlands. Journal of Medical Entomology 43: 1142–1152.
Harrington, R. A., R. Kujawski, and H. D. P. Ryan. 2006. Invasive plants and the green industry. Journal of Arboculture 29: 42-48.
Kourtev, P. S., J. G. Ehrenfeld, M. Häggblom. 2002. Exotic plant species alter the microbial community structure and function in the soil. Ecology 83: 3152-3166.
Knight, T.M., K. Havens and P. Vitt. 2011.Will the use of less fecund cultivars reduce the invasiveness of perennial plants? BioScience 61: 816-822.
Lehrer, J. M., M. H. Brand and J. D. Lubell. 2006a. Tackling a thorny issue. American Nurseryman 204: 30-36.
Lehrer, J. M., M. H. Brand and J. D. Lubell. 2006b. Four cultivars of Japanese barberry demonstrate differential reproductive potential under landscape conditions. HortScience 41 :762-767.
Lehrer, J. M., M. H. Brand and J. D. Lubell. 2006c. Seedling populations produced by colored-leaf genotypes of Japanese Barberry (Berberis thunbergii DC.) contain seedlings with green leaf phenotype. Journal of Environmental Horticulture 24: 133-136.
Lubell, J. D., M. H. Brand and J. M. Lehrer. 2008. AFLP identification of Berberis thunbergii cultivars, inter-specific hybrids, and their parental species. Journal of Horticultural Science and Biotechnology 83(1): 55-63.
Lubell, J. D. and M. H. Brand. June 2008. Detecting the influence of ornamental Berberis thunbergii var. atropurpurea in invasive populations of Berberis thunbergii (Berberidaceae) using AFLP. American Journal of Botany 95(6): 700-705.
Owhi, J. 1965. Flora of Japan. Smithsonian Institution, Washington, D.C.
Silander, J. A., and D. M. Klepeis. 1999. The invasion ecology of Japanese barberry (Berberis thunbergii) in the New England landscape. Biological Invasions 1: 189-201.
Williams, S. C. and J. S. Ward. 2010. Effects of Japanese Barberry (Ranunculales: Berberidaceae) removal and resulting microclimatic changes on Ixodes scapularis (Acari: Ixodidae) abundances in Connecticut, USA. Environmental Entomology 39: 1911-1921.
These plants average greater than 600 seeds per plant.
Phase out and then prohibit from sale the following 25 Berberis thunbergii cultivars and parent species (wild type):