Phyllosticta citricarpa
Previously known as: Guignardia citricarpa
Abbreviation: CBS
Citrus black spot is present in: Argentina, Australia, Brazil, China, United States (Florida), Indonesia, Japan, Kenya, Mozambique, Nigeria, Philippines, South Africa Taiwan, Uruguay, Venezuela, and Zimbabwe. No reports have been made from Mediterranean countries.
Citrus black spot is a pest of the following plants: Citrus spp. Commodities of particular concern include grapefruit, lemons, limes, mandarins, oranges, and pummelos.
Evidence of citrus black spot damage include:
Fruit - lesions on fruit are so diverse that lesions are grouped into several types: 1.) hard spot; 2.) false melanose/speckled blotch; 3.) freckle spot (early virulent spot); 4.) virulent spot; 5.) lacy spot; 6.) cracked spot.
Leaf - older lesions are small, round, sunken necrotic (dead) spots with gray centers. The lesions are bordered with a dark brown ring. Young lesions are small, reddish, and slightly raised. A yellow halo can be associated with the lesions. Foliar lesions are most commonly seen on lemons. Similar lesions can be seen on twigs and pedicles.
CBP Agriculture Specialists, please refer to manuals for general inspection guidelines.
Inspect citrus shipments for necrotic lesions with red borders and black spots on the peel of citrus fruits.
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