Sunburn of Apple

Sunburn damage is a skin discoloration of the exposed side of the fruit. Three different types of sunburn can be distinguished based the conditions of their formation;

  1. Sunburn browning is the most common type caused by the concomitant action of radiant heating and UV-B exposure. The symptoms are yellowish, brownish patches on the sun-exposed side of the fruit. Symptoms occur on the surface of the fruit (epidermis and hypodermis) but do not penetrate into the core tissues.
  2. Sunburn necrosis is