Phoma
(click image to enlarge) Symptoms:
• Dark brown to black necrosis on hypocotyls
• Wilting
• "damping-off"
Epidemiology:
• Seed born and only sporadically a problem
• Favored by wet conditions
• Temperatures between 40-68° F
• Pre-emergence damping-off 40-54° F
• Post-emergence damage 61-68° F
• Inactive above 77° F
Control:
• Seed treatments