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Powdery mildew of vegetable pea

Powdery mildew of vegetable pea

 

Causal Organism: Erysiphe cichoracearum DC.

  • Outbreak of this disease is associated with dry weather.
  • The disease affects the crop between February to April.
  • The disease develops late in season and reaches to maximum intensity at the time of pod formation.
  • The early cultivars escape the disease.

Symptoms:

  • It attacks leaves first producing faint, slightly discolourd specks from which grayish white powdery growth of mycelium and spores spread over leaf, stem and pod.
  • The leaves turn yellow and die.
  • The fruits do not either set or remain very small.
  • It causes defoliation.
  • Later stages, powdery growth also covers the pod making them unsuitable for marketing.


powdery mildew-vegetable pea

Control:

  • Avoid late planting.
  • After harvest, collect the plants left in the field and burn them.
  • By formulation of wettable Sulphur such as Sulfex and Thiovit at 3 kg/ha
  • Elosal 8 WP three time at 10 days interval
  • Karathane (Dinocap- 0.05%), Dikar (Manocap), Mososide (Binapacryl) and Morestan (Quinomethionate)
  • 0.03 % Calixin followed by Karathane (0.2%) and Bavistin (100 ppm)
  • Grow resistant varieties like JP-83, PSM-5, JP-4, JRS-14 and Arka Ajit.
  • There is need to develop cultivars resistant to powdery mildew because the disease is of common occurance. Some of them are P 185, and 6578 (immune to E. polygony), EC33866 as moderately resistant with 25% leaves infecting.

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