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Ramón A. Arancibia, Jeffrey L. Main and Christopher A. Clark

isolations have been inconsistent with this disorder: different pathogens and nonpathogens were isolated while in some cases nothing was isolated from lesions ( da Silva and Clark, 2012 ; Stokes et al., 2012 ). Therefore, a relationship with stress has been

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Jacqueline Joshua and Margaret T. Mmbaga

used clean media disks. Each isolate was tested on four plants arranged in a randomized complete block design. Development of root rot lesions was monitored and evaluated 14 d after inoculation when some roots were completely girdled with necrotic

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Teresa E. Seijo, Natalia A. Peres and Zhanao Deng

). Symptoms of BB begin as small, angular, water-soaked lesions visible on the lower leaf surface. The lesion can either expand in between major veins causing a large V-shaped necrotic area or veins can be infected and cause necrosis of the vein and adjacent

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Richard L. Bell and Tom van der Zwet

program initiated by Merton Waite in 1908 ( Magness, 1937 ). It was tested as OHUS 66170-047 and was selected in 1977 from the seedling orchard at the Ohio Agricultural Research and Development Center in Wooster, OH by R.C. Blake and T. van der Zwet

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Kyle M. VandenLangenberg and Todd C. Wehner

characterized by the appearance of small, water-soaked lesions on the underside of leaves. Lesions are often angular and bound by leaf veins, eventually turning chlorotic and necrotic. Heavy sporulation can be observed within the lesions on the abaxial leaf

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Lisa Keith, Tracie Matsumoto, Kate Nishijima, Marisa Wall and Mike Nagao

in the field. ( A ) Discrete dark brown lesions on the fruit surface and dark brown to black, coalescing lesions giving rise to dried and cracked appearance (cultivar Jitlee). ( B ) Mature cultivar Binjai fruit with dark brown lesions on rind and

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Xiaoyuan Feng, Baogang Wang, Wensheng Li, Lei Shi, Jiankang Cao and Weibo Jiang

plastic trays and stored at 25 °C, 95% to 100% relative humidity. Disease incidence (the percentage of fruit with visible disease development) and lesion diameter were measured daily after inoculation for 4 d. Each treatment was applied to three replicates

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Marcos R. Sachet, Idemir Citadin, Silvia Scariotto, Idalmir dos Santos, Pedro H. Zydek and Maria do Carmo B. Raseira

is established, the rate of lesion development increases with temperature. Table 4. Correlations between healthy leaf area index (HLAI) and number of days grouped into four classes of daily mean relative humidity (RH) × daily mean temperature (DMT) on

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Akihiro Itai, Takaaki Igori, Naoko Fujita, Mayumi Egusa, Motoichiro Kodama and Hideki Murayama

, no report has yet documented the correlation between ethylene production and black spot disease. We report the effects of propylene, an analog of ethylene, and 1-MCP, an inhibitor of ethylene action, on the development of black spot disease

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Martin M. Williams II, Carl A. Bradley, Stephen O. Duke, Jude E. Maul and Krishna N. Reddy

they spread, limiting water movement. Symptoms of leaf blight can appear as large lesions with wavy margins and irregular, dark spots within the lesions (typically referred to as “freckles”). Yield of sweet corn (both ear weight and number of ears) can