When seedlings or cuttings decay at the base of the growth caused by fungus. day-neutral plant:

A fungus that affects seedlings causing the stem to rot and the plant to die. Using a sterilized seed starting mix, providing good air circulation and not over-watering can help prevent this.

When seedlings are weakened are killed by fungi from overly humid conditions

The collapse of seedlings and young plants due a fungal disease which rots the base of the stem.

Decay of young seedlings at ground level following fungal attack. Often the result of soil borne diseases and over watering.

A fungus that affects seedling, causing the stems to rot at the soil level. This can happen as the result of soil borne diseases, and over watering. Sterilized potting soil can prevent this.

disease the wilting and early death of young seedlings caused by a variety of pathogens

A fungal disease that attacks the stem of a plant in excessively damp conditions.

The death of seedlings by fungal disease, either before or after they emerge from the pod. See Seed Starting: Damping Off

Any of a number of fungal diseases which attack seedlings, causing the stem to wither at the soil line, collapsing the plant. There is no good cure for affected plants, but any remaining plants can be [..]

 When seedlings or cuttings decay at the base of the growth caused by fungus.

a common fungal disease that wilts seedlings and rots stems. It can often be avoided by holding off on mulching until the seeds have sprouted.

A disease of seeds or young seedlings caused by fungi.