Vascular discoloration of an artichoke plant caused by Verticillium wilt, Verticillium dahliae.

Vascular discoloration of an artichoke plant. Credit: Steven T. Koike, Director TriCal Diagnostics
Vascular discoloration of an artichoke plant caused by Verticillium wilt, Verticillium dahliae. Credit: Steven T. Koike, Director TriCal Diagnostics