Verticillium Wilt

Verticillium Wilt is a highly destructive soil-borne fungal disease caused by the ascomycete pathogens *Verticillium dahliae* and *Verticillium albo-atrum*. This vascular parasite represents a severe threat to over 350 species of plants, including vegetables, fruit trees, and ornamental shrubs. The fungus enters through the roots and invades the xylem vessels, multiplying and physically blocking the flow of water and nutrients, which results in systemic wilting and eventual plant decline.

Identifying Verticillium wilt requires observing foliar symptoms and checking internal wood. The classic symptom is "one-sided wilting," where branches on only one side of a plant wilt and turn yellow while the other side remains healthy. Leaf margins turn yellow, curl, and die back, forming distinct V-shaped lesions. When the stem is cut open, a diagnostic dark brown discoloration of the outer wood (xylem ring) is revealed.

Verticillium targets high-value solanaceous vegetables and woody ornamentals.

Management focuses on prevention and crop rotation, as the fungus forms tough micro-sclerotia that survive in the soil for over a decade. Sowing certified disease-free seed and resistant cultivars is critical. Soil solarization during summer helps reduce fungal spores. For advanced vascular wilt guides, visit our Plant Disease Identifier Hub, or explore related threat profiles like Fusarium Wilt, Bacterial Wilt, and Root Rot.