Abstract
AbstractMimosa caesalpiniifolia: Fabaceae (sansão‐do‐campo or sabiá, in Brazil) is a small tree or shrub native to the Brazilian semi‐arid forest and widely used as a hedge plant in Brazil. Although of economic relevance, little is known of fungal pathogens infecting this plant. Recently, plants growing in an urban situation at Ouro Preto, and also on the roadside in Viçosa (state of Minas Gerais, Brazil), were found to be severely attacked by a powdery mildew which led to progressive leaf blight and serious defoliation. Based on morphology and molecular phylogenetic analysis of nuclear rDNA sequences, the fungus was identified as Erysiphe diffusa—a pathogen best known attacking soya bean, particularly in highland plantings.
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