![]() ![]() However, leaf spots may, in advanced stages, expand to kill entire areas of leaf tissue and thus exhibit blight symptoms.īlights are often named after their causative agent. On leaf tissue, symptoms of blight are the initial appearance of lesions which rapidly engulf surrounding tissue. South American leaf blight, caused by the ascomycete Pseudocercospora ulei, also called Microcyclus ulei, ended the cultivation of the rubber tree ( Hevea brasiliensis) in South America.Bur oak blight, caused by the fungal pathogen Tubakia iowensis.Ascochyta species and Alternaria triticina that causes blight in wheat Early blight of potato and tomato, caused by species of the ubiquitous fungal genus Alternaria.Bacterial seedling blight of rice ( Oryza sativa), caused by pathogen Burkholderia plantarii.Bacterial leaf blight of rice, caused by the bacterium Xanthomonas oryzae (Uyeda & Ishiyama) Dowson.Fire blight of pome fruits, caused by the bacterium Erwinia amylovora (Burrill) Winslow et al., is the most severe disease of pear and also is found in apple and raspberry, among others. ![]()
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