Tomato Diseases
Fasarium Wilt
Symptoms
- Clearing of the veinlets and yellowing of the lower leaves.
- Younger leaves die in succession.
- Petiole and leaves droop and wilt.
- Browning of vascular system.
- Entire plant wilt and die.
Identification
- Causal Organism: Fusarium oxysporum f.sp. lycopersii (Sacc.) W.C. Snyder and H.N. Hansen
- Asexual spores: Microconidia, Macroconidia and Chlamydospore
- Macroconidia: Three to five cells with pointed or curved edges
- Chlamydospores: Single or in pairs
- Survival and Mode of Spread
> Survival: In soil as mycelium and chlamydospores
> Primary spread: Infected debris
> Secondary spread: Water and planting equipment
- Favourable conditions: Dry weather (high soil temperature) and low soil moisture.
Management
- Soil solarization.
- Crop rotation.
- Removal of infected plant.
- Seed treatment with Trichoderma asperellum (viride) @ 4g/kg seeds.
|
Fungicide |
Dosage |
|---|---|
|
Bacillus Thuringiensis Var. Kurstaki Serotype 3a, 3b, Sa II WG |
1.0 kg with 50 kg of FYM/acre at 30 days of transplanting |
