Pomegranate Bacterial Leaf Blight
Bacterial blight of pomegranate has assumed epidemic proportions (40-85% severity) in northern Karnataka (Bijapur, Bellary, Bagalkot) seriously threatening its cultivation.
- Appearance of one to several small water soaked, dark colored irregular spots on leaves resulting in premature defoliation under severe cases.
- The pathogen also infects stem and branches causing girdling and cracking symptoms.
- Spots on fruits were dark brown irregular slightly raised with oily appearance, which split open with L-shaped cracks under severe cases.
Initial symptoms on leaves
Defoliation due to Bacterial Blight
Symptoms on flower
Symptoms on branches
V and Y shaped cracks on the spots
Cracking of fruit due to BLB
Causal organism: Xanthomonas axonopodies pv.punicae
- Primary source of inoculum: Infected cuttings
- Secondary source of inoculum: Wind splashed rains
The increase in day temperature (38.6°C) and afternoon relative humidity of 30.4% along with cloudy weather and intermittent rainfall favored the disease initiation and further spread of the disease.
Submitted by naipagropediaraichur on Mon, 19/03/2012 - 10:33