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Black shank, caused by the hemibiotrophic oomycete Phytophthora parasitica var. nicotianae, is a major disease of tobacco (Nicotiana tabacum) in southwest China. Mefenoxam is one of the most commonly used fungicides for its management. A survey was conducted to determine the level of mefenoxam sensitivity in the pathogen population in Guizhou province and to determine the race distribution of selected...
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