Cotton Diseases
➡️1. Bacterial blight/angular leaf spot/black arm: Xantomonas campestris ;pv. malvacearum
✅Most serious disease of cotton in India
✅Angular and water soaked lesion on leaf & stem.
✅On the stem develops peripheral cracks called black arm'.
‼️Management:
✏️Spray a mixer of Streptocyclin + Copper oxychloride @ 50 + 250 g/ha
✏️Seed treatment with Agrimycine
➡️2. Tirak/bad opening of bolls:
‼️Physiological disorder
✅Premature defective opening of bolls & shedding of leaves
‼️Management:
✏️Follow late sowing
✏️Apply extra water at flowering & fruiting in sandy soil. 3. Fusarium wilt: F. monilliforme f. sp. vasinfectum.
➡️4. Stenosis/small leaf: Viral
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