CassavaHigh field risk
Cassava bacterial blight
Xanthomonas phaseoli pv. manihotis
A bacterial disease that can move through infected planting material, rain splash and contaminated tools.
Pictorial field guide
Illustrative symptom pattern for physical comparison. Lighting, crop stage and cultivar can change appearance; never diagnose or treat from this picture alone.
Compare several physical signs
Use the diagram to orient a field inspection, then look across multiple plants and both sides of affected leaves before contacting an extension officer.
- Angular water-soaked leaf spots
- Leaf blight and wilting
- Stem cankers or gummy exudate in severe cases
Field checks before treatment
- 1Avoid moving tools from affected to healthy plots
- 2Sanitize equipment between fields
- 3Confirm suspected infection with an extension service
Reduce future risk
- Plant clean cuttings
- Rotate fields where locally practical
- Avoid handling plants while foliage is wet
Irrigation note
Prefer soil-level irrigation and allow foliage to dry. Do not increase watering simply because leaves are wilting.
Open irrigation guideAutomated decision support only. Confirm crop treatments with a qualified extension officer before applying a pesticide, fungicide, removing plants, or changing field treatment. Always follow the product label and local registration rules.