2005
DOI: 10.1094/pd-89-0228
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Field Evaluation of a New Sequential Sampling Technique for Determining Apple Scab “Risk”

Abstract: Most fungicide sprays applied to apple orchards in the New England states are targeted at the management of apple scab. Researchers have developed action thresholds that aid in decision-making on whether early spring fungicide applications could be eliminated without a significant increase in the incidence of fruit scab at harvest. To facilitate grower adoption of these thresholds, a simplified, sequential sampling technique in autumn to determine the “scab risk” of an orchard for the following spring was prop… Show more

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Cited by 10 publications
(13 citation statements)
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“…O controle químico da sarna da macieira, a tática mais utilizada pelos produtores, inicia-se imediatamente após a brotação e pode chegar a um total de 9 a 15 aplicações de fungicidas durante o ciclo da cultura (Reardon et al, 2005). Entretanto, a demanda crescente dos consumidores por produtos com níveis adequados de resíduos, a cobrança social por sistemas de cultivo de menor impacto ambiental e a redução na eficiência dos fungicidas pela seleção de isolados de V. inaequalis resistentes geram a necessidade de buscar táticas alternativas e complementares para o manejo da doença (Jobin & Carisse, 2007).…”
Section: Abstract Partial Resistance Of Old Apple Cultivars To Venturunclassified
“…O controle químico da sarna da macieira, a tática mais utilizada pelos produtores, inicia-se imediatamente após a brotação e pode chegar a um total de 9 a 15 aplicações de fungicidas durante o ciclo da cultura (Reardon et al, 2005). Entretanto, a demanda crescente dos consumidores por produtos com níveis adequados de resíduos, a cobrança social por sistemas de cultivo de menor impacto ambiental e a redução na eficiência dos fungicidas pela seleção de isolados de V. inaequalis resistentes geram a necessidade de buscar táticas alternativas e complementares para o manejo da doença (Jobin & Carisse, 2007).…”
Section: Abstract Partial Resistance Of Old Apple Cultivars To Venturunclassified
“…As a result, a sequential sampling procedure was developed based on the analysis of 66 fall assessments of leaf scab (MacHardy et al, 1999;Reardon et al, 2005). This sampling procedure is use to classify orchards as "low risk" or "high risk" (Reardon et al, 2005). Fig.…”
Section: Inaequalis) This Interaction Is Constantly Influenced Bymentioning
confidence: 99%
“…Nevertheless, despite the large amount of research that has been done on apple scab, the disease is still one of the most destructive and economically important disease in several apple production areas. Scab management may require 6 to 16 sprays annually depending on disease pressure, cultivar susceptibility, weather conditions, and marketing objectives (Reardon et al, 2005, Van der Sheer, 1992, Holb et al, 2005. Intensive use of fungicide in apple production has led to unstable control as fungicide resistance arose.…”
Section: Models To Estimate Risk Of Primary Infectionsmentioning
confidence: 99%
“…In eastern North America, most current strategies for managing apple scab are based on controlling primary infections in order to avoid epidemic build-up caused by secondary infections and, thus, reduce or eliminate the need for subsequent fungicide applications during the summer months. To achieve this goal, fungicide applications generally begin in the spring at the green tip phenological stage and continue throughout spring in to early summer, resulting in approximately 8-10 fungicide applications (Reardon et al 2005). If this approach fails to control scab adequately, then fungicides must be applied during the summer and the annual number of fungicide sprays could rise to 14-16, depending on the prevailing weather conditions during the summer months (MacHardy 1996; Reardon et al 2005).…”
Section: Introductionmentioning
confidence: 99%
“…To achieve this goal, fungicide applications generally begin in the spring at the green tip phenological stage and continue throughout spring in to early summer, resulting in approximately 8-10 fungicide applications (Reardon et al 2005). If this approach fails to control scab adequately, then fungicides must be applied during the summer and the annual number of fungicide sprays could rise to 14-16, depending on the prevailing weather conditions during the summer months (MacHardy 1996; Reardon et al 2005). It is therefore important to develop tools to precisely estimate the level of control of primary infections.…”
Section: Introductionmentioning
confidence: 99%