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NounEdit · citrus black spot (uncountable). (phytopathology) A disease of citrus plants caused by the Guignardia citricarpa fungus. Please follow the below links for guidance on Citrus Black Spot: University of Florida: Citrus Black Spot · USDA APHIS: Citrus Black Spot. Translation. Citrus Black Spot on 'Valencia' Caused by Guignardia citricarpa in South Florida. P.D. RobeRts1, K.e.M. HenDRicKs1, c. bRooKs2, anD H. Yonce2.

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NounEdit · citrus black spot (uncountable). (phytopathology) A disease of citrus plants caused by the Guignardia citricarpa fungus. Black spot affects citrus foliage and fruits. There are several fruit symptoms that may overlap. Typical symptoms consist of hard spots that begin as small. Quiescent infections on fruit develop to produce the typical black spot symptom after the fruit attains full size or becomes mature. Such infection on leaves.

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citrus black spot. Guignardia citricarpa Leaf lesions are uncommon on most citrus but may be more frequent on lemons. Lesions are small, sunken necrotic. In high humidity, large numbers of pycnidia may develop. The lesions can turn brown to black with a leathery texture that eventually covers the entire fruit. Citrus black spot (CBS) is an important fungal disease with significant economic impact on the citrus industry throughout the world.