Damping-off is a disease of germinating seeds and
seedlings caused primarily by Pythium, Phytophthora, Rhizoctonia
and Alternaria fungi. It can spread within the days
and an entire planting can be destroyed. Prevention is most important and includes
the use of sterile potting mix, clean sterile pots, proper watering, ventilation,
ensuring an optimal heat and light environment so seedlings germinate and grow
quickly.
Leek transplants affected by damping off