Sunflower Wilt Diseases: Charcoal Rot, Phialophora Yellows, and Verticillium Wilt

This article describes three wilt diseases of sunflower (Helianthus annuus L.), charcoal rot, Phialophora yellows, and Verticillium wilt, caused by soilborne fungal pathogens that initiate infections through the roots. We provide information on methods and techniques for identifying and distinguishing these diseases with signs, symptoms, and biological characteristics described for each of the causal pathogens. Accurate diagnosis of diseases and knowledge of their causal agents on sunflower are critical steps for developing and recommending disease management strategies.