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Kyle M. VandenLangenberg and Todd C. Wehner

and processing cucumber market was valued at $29 million ( USDA, 2012 ). Downy mildew, caused by the oomycete pathogen P. cubensis Rostov, is a major foliar disease of cucumber ( Palti and Cohen, 1980 ). The disease symptoms on cucumber are

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Daniel P. Gillespie, Chieri Kubota, and Sally A. Miller

diseases, pathogens can still be introduced into production facilities through air, sand, soil, peat, source water, seeds, or insects ( Stanghellini, 1996 ; Stanghellini and Rasmussen, 1994 ). Once a pathogen, especially a fast-spreading oomycete species

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Stephen R. King, Angela R. Davis, Wenge Liu, and Amnon Levi

Grafting vegetable crops is a common practice in Asia and parts of Europe. It was initially introduced to control fusarium wilt in watermelon ( Murata and Ohara, 1936 ), but its use has expanded to include a variety of diseases on cucurbit and

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Monica L. Elliott

For many years, the palm disease spectrum in the Florida landscape had been relatively stable, with lethal yellowing (a phytoplasma disease caused by ‘ Candidatus Phytoplasma palmae’ subgroup 16SrIV-A) and ganoderma butt rot (a fungal disease

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H. Brent Pemberton, Kevin Ong, Mark Windham, Jennifer Olson, and David H. Byrne

Rose rosette disease is incited by a negative-sense RNA virus (genus Emaravirus ), which is vectored by a wind-dispersed eriophyid mite ( P. fructiphilus ) ( Di Bello et al., 2015a ; Laney et al., 2011 ). Symptoms on roses include witches broom

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Adam D. Call, Todd C. Wehner, Gerald J. Holmes, and Peter S. Ojiambo

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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Karen R. Harris, Brian M. Schwartz, Andrew H. Paterson, and Jeff A. Brady

diseases of bermudagrass include spring dead spot caused by Ophiosphaerella herpotricha , O. korrae , and O. narmari , brown patch caused by Rhizoctonia spp., and dollar spot caused by Sclerotinia homoeocarpa ( Baird et al., 1998 ; Taliaferro, 2003

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Adam D. Call, Adam D. Criswell, Todd C. Wehner, Kaori Ando, and Rebecca Grumet

( Lebeda, 1992 ; Lebeda and Widrlechner, 2003 ; Palti and Cohen, 1980 ). The downy mildew present in the United States has the ability to cause disease on formerly resistant (pre-2004) cucumber cultivars. Several races of P. cubensis have been reported

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Kent M. Eskridge

55 COLLOQUIUM 2 (Abstr. 995-999) Classical and Molecular Approaches to Breeding Horticultural Plants for Disease Resistance

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Alireza Pourreza, Won Suk Lee, Mark A. Ritenour, and Pamela Roberts

Florida citrus industry has been threatened by several, previously exotic citrus diseases during the past few years. Citrus canker (caused by Xanthomonas axonopodis pv. citri ), a bacterial disease, was discovered in 1995 near the Miami