Coffee Leaf Rust

• Other names: La roya (Spanish, means "the rust")
• Caused by: Hemileia vastatrix - a fungus
• Occurrence: This disease occurs in nearly all coffee-growing area in the world - except Hawaii. First recorded in Sri Lanka in 1861.
• 
  Coffee leaf rust disease.
  ©Kraft foods Germany
  and Gtz. Economic losses: Coffee leaf rust causes leaves to drop prematurely, thus reducing photosynthesis capacity, growth and yield. Losses due to this disease is usually about 15-20%, sometimes can reach 70%.
• Part(s) of the plant it affects: Leaves, young twigs, and sometimes green berries
• 
  
  Rust Map
  
  Created by Team 01639.
  Data gathered from CABI. Symptoms: Yellows spots, powdery yellow-orange lesions on the surface of the leaves. Infected leaves drop prematurely (premature defoliation)
• Treatment and management: Spraying with fungicides, pruning infected leaves, applying enough fertilizers to keep the plant healthy.

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