Nondefoliating Pathotypes of Verticillium dahliae Races 1 and 2 Causing Verticillium wilt and Mortality of Ailanthus altissima in Northeastern Spain

Verticillium wilt on the invasive plant species, Ailanthus altissima, has been reported in Europe and USA. Symptoms of the disease in northeastern Spain were first observed in 2007, and it has progressively expanded within this region thereafter. In this work, ninety-two Verticillium isolates were recovered from diseased Ailanthus trees in four riparian-forested sites in the Girona Province of northeastern Spain. Identification of Verticillium field isolates to specie