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Mary Ruth McDonald and Sean M. Westerveld

, followed the same pattern as disease incidence in both years. Incidence and severity of clubroot were higher on pak choy than on flowering cabbage throughout the trial ( P < 0.0001). Table 2. Effect of seeding date on the incidence and severity of

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Mark K. Ehlenfeldt, James J. Polashock, Allan W. Stretch, and Matthew Kramer

humidity were useful predictors of disease incidence. The year × cultivar interaction is typically considered to be an “unpredictable” part of the cultivar × environment interaction ( Lin and Binns, 1988 ). However, we found that weather variables from

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Lina M. Rodríguez-Salamanca and Mary K. Hausbeck

tomato, severe disease incidence incited by C. coccodes is most often associated with high rainfall during the growing season ( Dillard, 1989 ). Disease incidence may also be increased by the use of overhead irrigation ( Raniere and Crossan, 1959 ). C

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Beiquan Mou, Steven T. Koike, and Lindsey J. du Toit

completely resistant (immune) to the disease. However, there were significant differences in both incidence and severity of the disease among the genotypes tested. Of the 360 genotypes evaluated in 2004 (Test 1), disease incidence ranged from 10% to 100% and

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Rachel P. Naegele

the laboratory on 1/2 strength PDA under constant light at 25 °C on 100-mm petri dishes (Thermo Fisher Scientific Inc., Waltham, MA). Table 1. Mean berry and leaf disease incidence for Vitis lines inoculated with one of two isolates of Botrytis

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Jiaqi Yan, Megan M. Dewdney, Pamela D. Roberts, and Mark A. Ritenour

experiment. The disease incidence in this grove was 100%, with every tree having at least one fruit with CBS lesions, and no preharvest fungicide was used on these trees. The fruit were washed for 1 min on a rotating brush bed with water and then separated

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Theodore McAvoy, Joshua H. Freeman, Steven L. Rideout, Stephen M. Olson, and Mathews L. Paret

considerable economical losses under ideal conditions for disease incidence ( Ji et al., 2007 ). Once established, R. solanacearum can survive in the soil on the roots of asymptomatic plants, weeds, and plant debris ( Elphinstone et al., 1998 ; Granada and

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Neel Kamal and Christopher S. Cramer

the same time of the day on the day of counts and ratings to mitigate the influence of daytime on leaf wax, color, and thrips number. Disease incidence in each plot was calculated as the ratio of plants that showed IYS symptoms to the total number of

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Yunwen Wang, Huangjun Lu, Richard N. Raid, Gregg S. Nuessly, and Georgy Faroutine

scored for disease incidence and severity. The disease incidence was calculated by the percent of infected plant among all plants in each row. The disease severity of a plant was evaluated using the 0–4 rating system as reported by Bull et al. (2007

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Beiquan Mou, Steven J. Klosterman, Amy Anchieta, Elisabeth Wood, and Krishna V. Subbarao

. Statistical analysis. The highest weekly disease severity ratings for each plant were used in the statistical analysis. Percentage data of diseased plants (incidence) and seed infection (determined by NP-10 test) were subjected to sin −1 · transformation