Agricultural crops :: Cereals :: Rice
Bakanae disease / foot rot:Gibberella fujikuroi
|
Symptoms:
- Infected plants several inches taller than normal plants in seedbed and field
- Thin plants with yellowish green leaves and pale green flag leaves
- Drying of seedlings at early tillering
- Reduced tillering and drying leaves at late infection
- Partially filled grains, sterile or empty grains for surviving plant at maturity
- In the seedbed, infected seedlings with lesions on roots will die, which may die before or after transplanting
|
 |
|
 |
| Infected and healthy plant |
|
Longer internodes |
|
Identification of pathogen:
- Fungus produces both macro and microconidia. Microconidia are hyaline, single celled and oval.
- Macroconidia are slightly sickle shaped, and two to five celled.
- The fungus produces the phytotoxin, fusaric acid, which is non-host specific.
Mode of Spread and Survival :
- The fungus is externally seed-borne.
|
Management:
- Treat the seeds with Thiram or Captan or Carbendazim at 2 g/kg.
Source of information:
- AICRIP rice, TNAU Coimbatore; Rice diseases- online resource, IRRI, Phillippines.
Acknowledgements:
|
|
