Symptoms
- Water soaked spots appear at the collar region of the pseudostem and progresses upwards and downwards.
- The first conspicuous symptom is mild drooping and curling of leaf margins of the lower leaves which spreads upwards
- Yellowing starts from the lowermost leaves and gradually progresses to the upper leaves. In the advanced stage, the plants exhibit severe yellowing and wilting symptoms.
- The vascular tissues of the affected pseudostems show dark streaks. The affected pseudostem and rhizome when pressed gently extrudes milky ooze from the vascular strands.
Management
- The cultural practices adopted for managing soft rot are also to be adopted for bacterial wilt.
- The seed rhizomes may be treated with streptocycline 200ppm for 30 minutes and shade dried before planting.
- Once the disease is noticed in the field all beds should be drenched with Bordeaux mixture 1% or copper oxychloride 0.2%.
Image Source
| Yellowing of leaves | Infected field |