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Horticultural crops :: Plantation :: Coffee

Rust: Hemileia vastatrix

Symptoms

  • It mostly affects leaves or some time leaves and tender shoots. In earlier stage, 2- 3m.m size yellow spots develop on the lower surface of leaves.
  • Rust lesions develop as orange yellow spots on lower surface of leaves. Thousasnds of small rust appear on the leaf. The upper surface of the leaves become yellow to brown.
  • At later stages, yellow rusty appearances are found on the entire undersurface of the leaf. The orange yellow spots are followed by black spots followed by necrosis.
  • Infected leaves defoliate and branch remains without any leaves. The plants remain stunted with reduced yield. Reduced yileds and reduced profit are obtained in these kind of infected crops.

Management

  • Collection and destruction of diseased leaves. Grow S 238, S 395 resistant varieties.
  • Spraying of Bordeaux mixture 0.5% before flowering, during rainy and after rainy seasons in the month of may, august- september and october respectively will prevent from the diseases.


Orange yellow spots Rust pustules

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