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Clove diseases – Kisan Suvidha
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Clove diseases

clove diseases

Clove diseases

Major Clove diseases are:-

1.Cardamom Seedling WiltCylindrocladium sp., Fusarium sp., Colletotrichum sp., Rhizoctonia sp., and Trichoderma sp

Symptom:
  • Seedling wilt is found mainly in nurseries and causes five to 40% death of seedlings. Leaves of affected seedlings loose natural lustre, tend to droop and ultimately die.
  • The root system and collar region of the seedling show varying degrees of, discolouration and decay.
Management:
  • Since the infected seedlings promote spread of the disease they are to be removed and destroyed and the nursery is drenched with Copper oxychloride 0.25 %.

 

2. Cardamom Leaf rot: Cylindrocladium quinquiseptatum

Symptom:
  • It is noticed in the nurseries as well as in the main field both at young and mature stages.
  • The infection starts as dark spots at the leaf margin and spreads sometimes with no definite pattern.
  • Rotting may be in the whole leaf or at the tip resulting in defoliation.
Management:
  • Seedling and young plants can be sprayed with systemic fungicides Carbendazim 0.1%.

 

3.Last Spot, Twig Blight and Flower Bud shedding:  Gloeosporium gleosporioides

Symptom:
  • Necrotic spots of variable size and shapes are noticed on the leaves.
  • Severely affected leaves wither, droop down and dry up.
  • In the nursery, seedlings die back symptoms are seen. Twigs are infected as the symptoms extend from the leaves through petioles.
  • The affected branches stand without leaves or only with young leaves at tips. Flower buds are attacked by spreading infection from the twigs.
  • Shedding of flower buds occurs during periods of heavy and continuous rainfall.
Management:
  • Spraying 0.25% Copper oxychloride at monthly interval reduces disease intensity, defoliation and flower bud shedding.
  • Initial spray is given just prior to flower bud formation and continued till the harvest of buds.

 

 

Source-

  • TamilNadu Agritech Portal

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