Pythium spp. Rhizoctonia spp.
Failure of seedling to emerge; light brown,
seedlings with light brown to redwater-soaked roots and stems; collapse of
plants; plant dry up and die; stunted plant growth; rotting taproot with few
COMMENTS on disease
Disease favors warm weather and very wet soil
with poor drainage
Plant pathogen-free seed or transplants that
have been produced in sterilized soil; apply fungicide to seed to kill off any
fungi; shallow plant seeds or delay planting until soil warms
Non-chemical Pest Management in Eggplant
There are 3 causal agents of damping-off, namely:
Pythium spp., Rhizoctonia solani, Fusarium Pythium spp.
The symptoms include dark-brown to black watersoaked lesions that rapidly
spread over the entire seedling causing the seedling to wilt and die.
Rhizoctonia solani The symptoms include
reddish-brown lesions on stem and death of growing tips. The lesions are also
found on roots and stem near the soil line that cause the seedlings to wilt and
Fusarium species The symptoms include dark-brown lesions on the stem and
dark-brown lesions on roots and stems at or near the crown, killing the
seedlings. The root lesion is soft and water-soaked.
Conditions that favor development
1. High soil moisture and/or compaction
3. Poor ventilation
4. Cool, damp, cloudy weather.
5. Water-splashing moves infested soil from
diseased to healthy plants.
1. Improve the drainage and regulate soil moisture to prevent soil saturation.
2. Seed treatment.
3. Rotation to cereal crops .
4. Soil fumigation or solarization may reduce damping-off in the field.
5. Use pasteurized soil mixes in nurseries