Ailanthus altissima
Another important host of "V. nonalfalfae" is "Ailanthus altissima," also known as tree of heaven. This species of "Ailanthus" was introduced in the northeastern United States from the 1790s, and is now a forest management problem in 40 of the 48 contiguous states. Spreading widely and quickly, it is considered to be an Invasive species. "V. nonalfalfae" is being studied as a biological control of "A. altissima". Symptoms of verticillium wilt on tree of heaven appear quickly after inoculation, according to studies. A vector of the wilt is the weevil "Eucryptorrhynchus brandti".