ROOT (WILT)
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| Yellowing of leaves | Flaccidity |
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Marginal necrosis | Inflorescence necrosis |
Causal organism : Phytoplasma
Symptoms
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Yellowing of the outer whorl of leaves and marginal necrosis |
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Abnormal inward bending or ribbing of the leaf let’s (flaccidity) |
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Drying up of spathes and necrosis of spikelets from tip downward |
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Extensive rotting of roots, main roots and rootlets start drying from tip backwards. The capacity of the palms to regenerate fresh roots is drastically reduced. |
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In the advanced stage the crown gets very much reduced in size and ceases to produce flower bunches. |
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The nuts from diseased palms have thinner husk and fibers are definitely weaker and less firm. |
Disease Management
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Removal of all disease advanced and uneconomic palms and replanting with healthy elite seedlings. |
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Application of recommended dose of fertilizers and application of 50kg FYM/palm/year |
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Grow green manure crops in coconut basins, Sowing during April- May (After fertilizer appln.) and incorporation during Sept-Oct (at the time of fertilizer application). |
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Control of leaf rot disease. |
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Irrigating palms during summer months |
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Intercropping/mixed cropping |