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Pomegranate diseases - Kisan Suvidha
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Pomegranate diseases

pomegranate diseases

Pomegranate diseases

Major Pomegranate diseases are:-

1.Pomegranate Cercospora Fruit Spot: Cercospora sp.

Pomegranate Cercospora fruit spot      cercospora on leaf

Symptom:
  • The affected fruits showed small irregular black spots, which later on coalesce, into big spots.
Management:
  • The diseased fruits should be collected and destroyed.
  • Two to three spray at 15 days interval with Mancozeb 0.25%.

 

2.Pomegranate Leaf Spot or BlightColletotrichum gloesporioides; Pseudocercospora punicae; Curvularia lunata and Cercospora punicae)

Pomegranate leaf spot

Symptom:
  • The disease is characterised by the appearance of small, irregular and water-soaked spots on leaves.Affected leaves fall off.
Management:
  • Spraying Mancozeb 0.25 % at 15 days interval gives good control of the disease.

 

3.Pomegranate Alternaria fruit spotAlternaria alternata

pomegranate fruit spot

Symptom:
  • Small reddish brown circular spots appear on the fruits.
  • As the disease advances these spots, coalesce to form larger patches and the fruits start rotting.
  • The rails get affected which become pale and become unfit for consumption.
Management:
  • All the affected fruits should be collected and destroyed. Spraying Mancozeb 0.25 % effectively controls the disease.

 

4. Bacterial blight: Xanthomonas axonopodis pv. punicae

Pomegranate bacterial blightSymptoms:
  • The appearance of one to several small water soaked, dark coloured irregular spots on leaves resulting in premature defoliation under severe cases.
  • The pathogen also infects stem and branches causing girdling and cracking symptoms.
  • Spots on fruits were dark brown irregular slightly raised with an oily appearance, which split open with L-shaped cracks under severe cases.

The primary source of inoculum is infected cuttings. A secondary source of inoculum has Wind splashed rains.

Continuous/intermittent rainfall for a longer period, congenial maximum (29.4 to 35.60C) and minimum temperature (19.5 to 27.30C) and relative humidity (63 to 87 %) were found favourable for the development and spread of the disease.

Management:
Cultural:
  • Wide row spacing
  •  Selection of disease free seedlings for fresh planting
  • Pruning affected branches, fruits regularly and burning
  • Bahar should be done in Hasta or Ambe Bahar
  • Give minimum four-month rest after harvesting the fruits
Chemical:

Spray:

  • Before pruning it should be sprayed with 1% Bordeaux mixture
  • After Ethrel spraying or defoliation, Paste or smear with 0.5g Streptomycin Sulphate + 2.5g Copper oxy chloride  + 200g red oxide per lit of water.
  • Spray 0.5 g Streptomycin Sulphate or Bacterinashak +2.5 g Copper oxy chloride per litre of water.

Next day or another day spray with 1 g ZnSo4 +1 g MgSo4 +1 g Boron +1g CaSo4 per lit of water.

 

Source-

  • TamilNadu Agritech Portal
  • Krishisewa.com

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