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Juan Carlos Díaz-Pérez and James E. Hook

., 2008 ). Plant diseases. In 2001, TSW incidence was low (mean = 3%) and unaffected by irrigation rate and Ca rate. In 2003, incidence of phytophthora blight decreased from 20% (at 33% ETc) with increasing irrigation rate up to 100% ETc and stayed about

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

studies. The study identified Lasmenia , Colletotrichum , Pestalotiopsis , and Phomopsis as the predominant pathogens in the Waiakea fields. The disease incidence varied among the nine cultivars of rambutan (‘Sileng Keng’, ‘R167’, ‘R134’, ‘Daun Hijau

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Ed Stover and Greg McCollum

Methods Plant material. Our objective was to quantify the incidence and severity of HLB among citrus types growing in commercial groves with disease pressure typical of the region. Because Florida citrus production is dominated by sweet orange and

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Cary L. Rivard and Frank J. Louws

infested conditions to determine their efficacy for heirloom tomato growers. We hypothesize that grafting heirloom tomato scion with resistant rootstock genotypes will reduce soilborne disease incidence in the field. Therefore, the primary purpose of this

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Huangjun Lu and Richard Raid

for response to BLS. In the field, plants were maintained according to standard commercial practices, sprayed with bacterial inoculum at thinning and again 2 weeks later, and rated for disease incidence and severity before harvest ( Bull et al., 2007

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Na Liu, Baoli Zhou, Xin Zhao, Bo Lu, Yixiu Li and Jing Hao

, disease incidence and disease severity were evaluated every 5 d using the following calculations: Disease symptoms were classified into five categories based on the proportion of the yellow–bronze-wilted leaves in a plant ( Wang et al., 2006

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Michelle A. Grabowski and Dean K. Malvick

°C. Disease severity and incidence were recorded every 14 DAI until frost. Disease incidence was recorded as the number of plants per bed that were visibly infected with S. sclerotiorum based on signs and symptoms. Any plant with questionable

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Aaron Heinrich, Shinji Kawai and Jim Myers

susceptible cultivars ( Hwang et al., 2012 ). Thus, resistant cultivars have the potential to reduce future disease incidence and severity. Brassica vegetable crops have been developed with durable resistance to clubroot, and seed companies have released

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

. Therefore, curing sweetpotato immediately after harvest is recommended to reduce tip rot in addition to other postharvest diseases ( Clark, 1992 ; Clark et al., 2013 ; Edmunds et al., 2008 ; Thompson et al., 2002 ). Table 4. Percent incidence of tip rot

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Ying Li, Xiao-Li Hu, Robert N. Trigiano, Herbert Aldwinckle and Zong-Ming (Max) Cheng

alternata and fire blight at the same time. It could enable us to improve efficiency during apple breeding. Materials and Methods Field disease incidence evaluation. According to previous records about disease severity, a survey of disease incidence was