A Diagnostic Guide for Fusarium Wilt of Watermelon

Fig. 2. Symptoms of Fusarium wilt in seedlings. (B) Basal stem necrosis is often observed in seedlings infected with FON (photograph by S. Saha, Purdue University Department of Horticulture).



Image from Plant Health Progress article:
A Diagnostic Guide for Fusarium Wilt of Watermelon