Citrus Canker
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Citrus canker presently occurs in over thirty countries in asia the pacific and indian ocean islands south america and the us.
As a canker lesion ages it may lose it palpable roughness but the concentric circles will still be visible with a hand lens on the underside of the leaf.
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Citrus canker. While not harmful to humans canker significantly affects the vitality of citrus trees causing leaves and fruit to drop prematurely. There is no cure for citrus canker. During past eradication attempts thousands of trees were destroyed. Citrus canker is a disease affecting citrus species caused by the bacterium xanthomonas axonopodisinfection causes lesions on the leaves stems and fruit of citrus trees including lime oranges and grapefruit.
In the gulf states in 1915. Leaf typical citrus canker lesions on leaves will range from 2 10 mm in size and will have raised concentric circles on the underside of the leaf. Frequently lesions will be surrounded by a water soaked margin and a yellow halo. While not harmful to humans canker significantly affects the vitality of citrus trees causing leaves and fruit to drop prematurely.
Citrus canker a contagious plant disease caused by the bacterium xanthomonas citri subsp. However canker lesions were noted on herbarium specimens collected in india as early as 1827. The disease is not a risk to human or animal health but makes fruit unsightly and unmarketable. While not harmful to humans the disease affects the health of infected citrus trees and the marketability of infected fruit.
Citrus canker was first described after it was discovered in the us. A fruit infected with canker is safe to eat but has reduced marketability as fresh fruit. Citrus canker is a bacterial disease that causes lesions on the leaves stems and fruit of plants including citrus and other plants in the citrus family. Citrus canker is a financially devastating disease that has been eradicated from the citrus market a couple of times only to return again.