Tomato Diseases
Septoria Leaf Spot
Symptoms
- Small, round to irregular spots with grey centre and dark margin on leaves.
- Spots coalesce and leaves are blighted.
- Complete defoliation.
- Stems and flowers are affected.
Identification
- Causal Organism: Septoria lycopersici Speg.
- Mycelium: Hyaline and septate
- Fruiting body: Pycnidium - globose, without distinct ostiole
- Pathogen: Pycnidiospore - filiform, septate, hyaline
- Survival and Mode of Spread
> Survival: Infected plant debris
> Primary spread: Mycelium or conidia
> Secondary spread: Conidia through rain splash or wind
- Favourable conditions: High humidity.
Management
- Cultural: Removal and destruction of affected plant parts.
- Biological: Seed treatment - Trichoderma asperellum @ 4g/kg seeds.
|
Fungicide |
Dosage |
|---|---|
|
200-250 ml/ha |
