Tomatoe seedling troubles
I have multiple varieties of tomatoe seedlings I was starting and used new trays and starter soil but it looks like some type of disease is getting them. I am looking to identify it and measures to resolve it/ prevent it from spreading more.
It appears your seedlings have Botrytis grey mold. It is a fungus that can spread rapidly from plant to plant in close growing conditions. It can spread plant to plant through any watering splash into the leaves. It likely was present in the seed. I would recommend disposing of all plants showing any symptoms. Water carefully at the base of the plant and space plants out so the have good air flow.