Seedling stems shrink and collapse after rotting at ground level. The infection can spread rapidly causing patches of seedlings to die off. An entire tray of seedlings can easily be killed within afew days. Fluffy white growth can be seen on the surface of the dead or dying seedlings. Cultural measures: Sow plants thinly and ensure good ventilation. Use clean, sterile compost and equipment. Never over water.
Product solution: Water compost with Fruit and Vegetable Disease Control - Spray well to cover seedlings and compost after sowing, pricking out and potting up.