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Yuan Li, Arend-Jan Both, Christian A. Wyenandt, Edward F. Durner and Joseph R. Heckman

mildew. Weekly applications of a fungicide can result in significant increases in cost, equipment, time, and labor. Most conventional fungicides currently used for cucurbit powdery mildew control have a high risk for resistance development ( Wyenandt et

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José M. López-Aranda, Luis Miranda, Juan J. Medina, Carmen Soria, Berta de los Santos, Fernando Romero, Rosa M. Pérez-Jiménez, Miguel Talavera, Steve A. Fennimore and Bielinski M. Santos

( Phytophthora cactorum ), verticillium wilt ( Verticillium spp.), and black root rot ( Fusarium spp., Rhizoctonia spp., Pythium spp., and Cylindrocarpon spp.) ( De Los Santos et al., 2003 ). Root-knot nematode ( Meloidogyne spp.) and lesion nematode

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Les D. Padley Jr, Eileen A. Kabelka and Pamela D. Roberts

line as a dark brown, water-soaked lesion that quickly collapses the stem causing plant death. Foliar blight appears as rapidly expanding, water-soaked lesions on the leaves that eventually causes dieback of shoot tips, wilting, shoot rot, and plant

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David Obenland, Dennis Margosan, Joseph L. Smilanick and Bruce Mackey

advantage of the fact that incipient decay lesions caused by the green mold or blue mold pathogens ( Penicillium digitatum or Penicillium italicum , respectively), and other severely damaged areas on the fruit display a bright yellow fluorescence in the

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165 pre-symptomatic trees; 155 were treated and 151 (97%) remained healthy and productive. In addition, they found that infected trees could be detected as early as 40-46 days prior to visual symptom development and potentially save growers $300 to

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Gabriele Gusmini, Luis A. Rivera-Burgos and Todd C. Wehner

, no symptoms on stem; 6–8 = symptoms on leaves and stems; 9 = plant dead. Plants with a disease rating of 6 or greater had lesions on the stem, thus being prone to death from subsequent development of the disease. Plants with a disease rating of 5 or

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Neel Kamal, Ashish Saxena, Robert L. Steiner and Christopher S. Cramer

disease in the southwestern United States ( Wall and Corgan, 1994 ). Every year, this disease causes yield and quality losses in the field and during storage ( Wall and Corgan, 1994 ). Bulbs with black mold exhibit shallow lesions on dry outer scales and

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Joseph N. Wolukau, Xiao-Hui Zhou, Ying Li, Yong-Bin Zhang and Jin-Feng Chen

pesticides in the environment. Moreover, development of resistance to some systemic benzimidazole fungicides in D. bryoniae from several cucurbit production areas has been reported ( Kato et al., 1984 ; Keinath and Zitter, 1998 ; Malathrokis and

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Patrick D. O'Boyle, James D. Kelly and William W. Kirk

disease-free seed, bactericide treatment, crop rotation, and deep-plowing, have reduced CBB epidemics, these control measures are generally inadequate ( Anderson et al., 1970 ; Zaumeyer and Thomas, 1957 ). Development of resistant cultivars is needed to

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Jennifer R. DeEll and Behrouz Ehsani-Moghaddam

., 2004 ). Soft scald, also known as ribbon scald or deep scald, is a low-temperature disorder that is characterized by sharply defined, irregularly shaped brown lesions on the apple skin ( Meheriuk et al., 1994 ; Snowdon, 1990 ). Damage can extend