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States, Israel, and Europe, commercial sweet basil is readily identified by a distinct phenotype and chemotype used in the fresh, dried, and culinary industries ( De Masi et al., 2006 ; Simon et al., 1990 ). Downy mildew has become a devastating disease

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their morphology relative to growth habit; size, shape, texture, and orientation of leaves; and color of leaf, stem, and flower, resulting in a wide variety of ornamental cultivars ( Simon et al., 1999 ). Basil downy mildew, caused by Peronospora

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Sweet basil is the most commonly grown and economically important species of basil in the world ( Vieira and Simon, 2006 ). Basil downy mildew is a significant pathogen of sweet basil. Infection causes yellowing of the leaf tissue in bands delimited

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moisture content for the fresh market and volatile oil content for the processing market. Downy mildew of basil, caused by the oomycete Peronospora belbahrii Thines (Peronosporales: Peronosporaceae) ( Thines et al., 2009 ), has become the most devastating

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). Global production of sweet basil is being threatened by a newly emerging disease, basil downy mildew caused by the obligate oomycete Peronospora belbahrii ( Belbahri et al., 2005 ; Thines et al., 2009 ). Ten years after being reported in Europe

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Cucurbit downy mildew is one of the most devastating and widespread diseases of cultivated cucurbits in the United States and worldwide ( Call et al., 2013 ; Lebeda et al., 2011 ; Ma and Cui, 1995 ; Neykov and Dobrev, 1982 ; Thomas, 1996 ). The

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Downy mildew, caused by the oomycete pathogen Pseudoperonospora cubensis (Berk. & cucumber ( Cucumis sativus L.) ( Palti and Cohen, 1980 ). Other economically important hosts of P. cubensis are melon ( Cucumis melo L.), watermelon [ Citrullus

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Cucurbit downy mildew caused by the oomycete Pseudoperonospora cubensis is economically the most important disease of cucumber ( Cucumis sativus L.) ( Palti and Cohen, 1980 ). Studies on the host range of P. cubensis indicate that ≈20 genera

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manufacturing perfumes, food flavors, and aromatherapy products ( Simon et al., 1990 ). Basil downy mildew, caused by Peronospora belbahrii , is an economically important disease of basil species in the United States ( Roberts et al., 2009 ; Wyenandt et al

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Niche hop ( Humulus lupulus L. var. lupulus ) production occurs throughout the eastern United States ( George, 2020 ). However, the wet and humid environment of these regions incite annual epidemics of downy mildew (DM) [ Pseudoperonospora

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