Description
Verticillium dahliae is one of the causal agent of vascular wilt in numerous economically important plants causing wilting of all or only parts of the host. The most common hosts are trees and shrubs, including olive and maple, and vegetables, including cotton, tomatoes and potatoes and also ornamentals. This soilborn fungus persists in the soil for many years under the form of tiny and black resting bodies called microsclerotia. These germinate in the presence of the host plant roots when the external conditions are beneficial. The resulting hyphae invades the plant roots into the the vascular tissue.