Arum italicum (Italian arum) is a perennial herbaceous geophyte native to parts of Europe, Russia, and northern Africa. It has spread outside of cultivation in northern Europe, Oceania, and the Americas. Leaves emerge in the fall and are shed in the early summer; inflorescences form in the spring and fruits ripen in mid-summer. Successful documented treatment options are limited. To test new chemical control methods, we treated plants in a Washington, D.C., natural area in mid-March with three chemical treatments (triclopyr + metsulfuron methyl, triclopyr alone, glyphosate + metsulfuron methyl), and a control. Cover estimates in the spring and fall showed a decline in cover for treatments that included metsulfuron methyl but not for the triclopyr alone treatment.
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Vol. 39 • No. 3