Identification

• All citrus is susceptible to the green mold disease caused by Penicillium digitatum. The airborne fungal spores contaminate the tree through wounds, as well as harvested and stored fruit. Fungal growth is favored by cool fall and spring weather.
  
  

Damage

• Disease starts with the appearance of soft, watery spots on fruit. The surface of spots becomes white with the growth of white mycelium. When spots are about 1 inch in diameter, green fungal spores appear in the center. The outer edges of lesions start to decay. Green spores cover entire fruit surface. Similar mold is seen on infected tree trunk.
  
  

Management

• Maintaining good sanitation around citrus is among the preventative measures for green mold. Harvest and handle fruit carefully with minimal injury to rind as any damaged areas become entry points for fungus.