Bhupendra Singh KharayatCollege of AgricultureG. B. Pant University of Agriculture and Technology Udham Singh Nagar, Uttarakhand, IndiaEmail: email@example.com
Host: Citrus aurantiifolia (Christm.) Swingle (lime)Disease name: CankerPathogen: Xanthomonas axonopodis pv. citri (Hasse) Vanterin et al.
Citrus canker first appears as tiny, dark, slightly raised spots or lesions, usually on the lower leaf surface. The lesions expand and become thick and spongy or corky, developing water-soaked margins and often surrounded by chlorotic halos. The water-soaked margin may disappear as the lesion ages, and it is not as prominent on resistant host cultivars. Cankers can occur on woody stems, bark may develop discolored areas, and dieback of stems coupled with internal reddening can occur. Infected fruit may develop scabs or pitting. On twigs and fruit, citrus canker symptoms are similar: raised corky lesions surrounded by oily or water-soaked margins. No chlorosis surrounds twig lesions, but it may be present on fruit lesions.
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