Response of pale swallowwort (Vincetoxicum rossicum) to multiple years of mowing. (September 2019)

• Record Type: Journal Article
• Authors: Biazzo, Jeromy; Milbrath, Lindsey R.
• Is Part Of: Invasive plant science and management. Volume 12:Number 3(2019)
• Page Start: 169
• Page End: 175
• Publication Date: 2019-09
• Subjects: Cardina John, Ohio State University; Dog-strangling vine, -- invasive plant, -- mechanical control, -- natural areas, -- old field, -- vine; Plants, Protection of -- Periodicals; Invasive plants -- Periodicals; 632.5
• DOI: 10.1017/inp.2019.22
• Languages: English
• ISSNs: 1939-7291

Abstract

Abstract: Pale swallowwort ( Vincetoxicum rossicum ), as well as its congener, black swallowwort ( Vincetoxicum nigrum ), is a European viny milkweed that has become invasive in natural areas and perennial cropping systems in the northeastern and midwestern United States and southeastern Canada. Mechanical control over 1 to 2 yr has not been effective, but studies of a longer duration are needed. We measured effects of mowing (no mowing or three or six times per growing season) on stem and root crown densities, percent cover, and follicle (seed pod) production of V. rossicum and percent cover of other vegetation over a 7-yr period. Stem density, root crown density, and percent cover of V. rossicum were reduced after 3 to 5 yr of mowing regardless of mowing frequency. Cover of other, mostly nonnative, broadleaf species increased. Follicle production was eliminated in all years of the study. In our environment, mowing three times at monthly intervals during the growing season can prevent seed production. However, mowing must occur for at least 3 yr to reduce, but not eliminate, stands of V. rossicum .