| LEAF ROT DISEASE: Colletotrichum gloeosporioides, Exserohilum rostratum and Fusarium spp. |
Symptom:
- The first symptom is the appearance of water-soaked brown lesions in the spear leaves of root-wilt affected palms.
- Gradually these spots enlarge and coalesce resulting in extensive rotting.
- As the leaf unfurls the rotten portions of the lamina dry and get blown off in wind, giving a "fan" shape to the leaves.
- Sometimes, the symptom becomes very acute and the spear fails to unfurl.
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| Water soaked brown leisons |
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Extensive rotting of leaves |
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Fan shaped appearence |
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Management:
Physical method
- Remove the rotten portions from the spear and the two adjacent leaves.
Chemical method
- Pour fungicide solution of Hexaconazole - 2ml or Mancozeb - 3g in 300ml water per palm to the base of spindle leaf. 2-3 rounds of spraying are sufficient in case of mild infection.
- Spray the crowns and leaves with 1% Bordeaux mixture or 0.5% copper oxychloride formulations or 0.4% mancozeb in January, April-May and September. While spraying, care has to be taken to spray the spindle leaf.
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