Citrus canker which infects lime is a major economical disease. A survey was conducted to determine the spread of disease during 91, 96, 98 and 1999 in same location Abyan and Lahej Governorates. There was variation in disease severity between governorates and between locations within each Governorate. The highest incidence of disease was reported in Zugeina and Khyala in Abyan Governorate, and Alareis in Lahej Governorate, low incidence of disease was reported in other locations. Lime is infected in all stages of growth. The laboratory and microscopic tests (including electronic microscop) revealed that bacteria Xanthomonas c.p.v (Hasse) Dye is the pathogen causing this disease in both Abyan and Lahej Governotates .
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