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Crop Name:  Sunflower

Disease Image:  
Disease management in Agriculture
Disease Name:  Alternaria Blight
Symptoms:  
  • The disease is characterised by the development of dark brown to black, circular to oval spots varying from 0.2 to 5 in diameter.
  • The spots are surrounded by necrotic chlorotic zone withgrey white necrotic centre marked with concentric rings.
  • Spots first appear on lower leaves, later spread to middle and upper leaves and At later stages, spots may be formed on petioles, stem and ray florets.
Management:  
  • Mid-September planting of sunflower remains free from the disease.
  • Foliar spray with 0.3 percent Mancozeb four times at an interval of 10 days controls the disease.
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