Porcelain berry is similar in appearance to wild grape except that the pith (center of the vine) of porcelain berry is solid white; it’s mature bark does not peel; the berry colors include white, yellow, lilac, turquoise, green and pink, eventually turning dark blue; their leaves are generally small with deep leaf lobes, and the underside of the porcelain berry leaves are always glossy.
The porcelain berry vine is a new invasive to Long Island. Cotyledons, the first two leaves to appear from a germinating seed, resemble wild grape and Virginia creeper but the underside of the first true porcelain berry leaf is glossy.
These vines often run along the ground where they may root wherever the nodes make contact. At a minimum, the root crown must be uprooted. When vines not bearing berries are cut above ground they can remain on the host tree to dry. Otherwise, they must be removed and disposed of.
Dig, using a Pulaski ax or mattock to uproot large vines, and pull roots with linesman pliers for smaller plants. Since any portion of the vine will re-root at a node when left on bare ground, cut vines and berries should be bagged and disposed of.
Check on regrowth semi-monthly and, with large pliers, remove suckers and seedlings in the area as they emerge.