A new disease, arboricola leaf spot of bell pepper, caused by Xanthomonas arboricola.
In June 2007, a leaf spot disease was observed on seedlings of bell pepper (Capsicum annuum var. angulosum) in a commercial greenhouse in Iksan City, Korea. Symptoms on leaves included small, irregularly shaped, brown lesions with yellow halos and marginal necrosis. Four bacterial isolates, BC2526, BC2527, BC2528, and BC2529, were obtained from the diseased plants. Based on biochemical and molecular data, as well as pathogenicity tests, the isolates were identified as X. arboricola. This is thought to be the first report of a leaf disease on bell pepper caused by X. arboricola. The name arboricola leaf spot is proposed for the disease. Further studies are required for determining pathovar status of the strain. Nucleotide sequence data reported are available under Accession Nos. GQ502678, GQ502679, GQ502680, and GQ50268I for gyrB of BC2626, BC2527, BC2528, and BC2923, respectively. The disease is expected to have a significant economic impact on tomato and pepper production in Korea.