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as yellow Sigatoka, caused by Pseudocercospora musae (Zimm.) Deighton, traditionally has been a problem in plantain production areas, especially in the mountains ( Gonzalez, 2009 ). However, the more recent incursion of Pseudocercospora fijiensis

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) concentrations were measured using a Kjeldahl nitrogen meter (Beijing, China), the vanadium molybdenum yellow colorimetric method, and flame photometry, respectively ( Bao, 2007 ). Samples were wet-digested in a mixture of nitric acid perchloric acid [HNO 3 :HClO

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