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Green Growth on Citrus Trees

Citrus are tropical to subtropical fruits that grow best in a warm, humid areas. The fruit thrives in well-drained, deep soil and is generally intolerant of very low temperatures and frost. A fungus infection leads to green growth on trees and fruit.

  1. 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.

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Bulbs
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  2. Mango Growth
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  6. Interior Fungus in Citrus Fruit
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  8. The Effect of Temperature on Citrus Fruit
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  10. Citrus Tree Growth
  11. Frozen Citrus Trees
  12. Green Fungus on Trees

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