Damping-off and root rot (Rhizoctonia solani / Pythium spp. / Fusarium spp.
Seedlings fail to emerge (pre-emergence damping-off); small seedlings collapse (post-emergence damping-off); seedlings are stunted through root rot and / or collar rot. Nursery beds show irregular patches. The fungi causing seedling diseases are soil inhabitants. Pythium spp. are favoured by low temperatures while R. solani and Fusarium spp. thrive at higher temperatures.
- Plant certified disease-free seed.
- Nursery beds should be located on well drained sites not previously under vegetable production.
- Proper watering regime.