HORDI Crop – Knol khol

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Knol khol

Brassica oleraceae var.caulorape

Released Varieties

Climate requirements/ Areas suitable for cultivation

Soil

Seed requirement

Land preparation

Field establishment

Spacing

Fertilizer

Water supply/ Irrigation

Weed Control

Pest Management

Disease Management

Causal Organism:  plasmodiophora brassicae

Symptoms

  • Swelling or malformation on the main lateral roots those are called club roots and those galls appear like clubs or spindles on the roots.
  • The crop can be completely destroyed due to damage

Management

  • Keeping the soil at a slightly basic pH of 7.1 – 7.2 by the addition of agricultural lime and apply 2-4 t/ha of lime to raise soil pH.
  • Use of disease free planting materials
  • As well as the integration of crop rotation

Causal Organism : Erysiphe cruciferarum

Symptoms

  • Small white patched on upper and lower surface which may also show purple blotching , later powdery layer can be seen which coats the leaves
  • leaves become chlorotic and drop from plant

Management

  • Plant resistant varieties
  • rotate crops
  • Remove all crop debris after harvest
  • Remove weeds
  • Application of surface sprays, dusts or vapors

Causal Organism: Peranospora parasitica

Symptoms

  • Infections of downy mildew begin as irregular yellow patches on leaves
  • These chlorotic lesions later turn brown
  • If conditions are favorable white fluffy growth of the fungus develops on the undersides of leaves

Management

  • Covering the nursery to protect it from rain
  • In the morning , remove the cover and allow get the sunlight
  • Apply of a fungicide containing tebuconazole (5 ml for 10 liters of water) for once is recommended.

Harvesting and Processing

Yield

 

 

 

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