Question: Bacterial blight of cotton is also known as ___________
Options:
Seedling blight
Angular leaf spot
Damping off
Both 1 and 2
✳ Brief Description:
Bacterial blight of cotton, also known as Angular Leaf Spot or Seedling Blight, is caused by Xanthomonas citri pv. malvacearum and affects leaves and bolls.
✧ Details of Bacterial Blight:
🌿 Causal Organism: Xanthomonas citri pv. malvacearum
🌱 Symptoms on Leaves:
→ Scattered small dark-green, water-soaked, areolate spots appear on the lower surface, measuring 1–2 mm.
→ Spots grow up to 5 mm in diameter, turning angular (due to leaf venation), brown, and eventually dark brown to blackish, becoming visible on the upper surface.
🌾 Symptoms on Bolls:
→ Dark green, water-soaked, greasy, circular lesions form across the bolls.
→ As bolls mature, lesions dry out, hindering normal boll opening.