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Post Harvest Diseases :: Fruits :: Apple
Alternaria rot: Alternaria alternate
Symptoms:
  • Typical rot symptoms of this disease are nearly round, brown to black lesions, often centred around a skin break or weakened tissue.
  • The spots are firm, dry and shallow.
  • The surface of spots becomes dark brown to black and in the advanced stages, the rotted tissues become spongy and the affected flesh turns black.
Rounded brown spot Enlarged brown spot Rotted tissues Internel rotten tissue

Management:

  • Practice orchard sanitation and “soft handling” of fruit.
  • Harvest fruit at proper maturity.
  • Careful handling during picking, washing, and packing
  • Store fruits at temperatures of 0° to 4 °C.

Image source: http://postharvest.tfrec.wsu.edu/marketdiseases/alternaria.html


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