Postharvest Incidence of Stem End Rot in 'Hayward' Kiwifruit Is Related to Preharvest Colonization of Floral Parts and Latent Infection.

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ID: 80085
2019
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Abstract
Stem end rot (SER) caused by is the primary postharvest disease in the Chilean kiwifruit industry. Relationships between the postharvest occurrence of SER in 'Hayward' kiwifruit and the temporal dynamics of earlier colonization of the floral parts (petals, sepals, receptacles, styles) was studied in five orchards over two consecutive seasons in Chile. Weather conditions in the first season favored . infection with roughly constant colonization of floral parts up to about 120 days after full bloom, but colonization then increased up until harvest. In the second season, colonization was roughly constant throughout. Latent infections of the fruit occurred in both seasons but were high in the first season and low in the second. Incidence of latent infections at harvest were the best predictors (r > 0.8) of postharvest SER. The number of preharvest infection periods calculated using temperature, leaf wetness, and relative humidity satisfactorily predicted SER incidence by an exponential model, R = 0.90, < 0.001. Results indicated environmental variables play key roles in the temporal dynamics of . colonization. Quantification of latent . infections in asymptomatic fruit close to harvest, is a practicable way to predict later incidence of SER during storage.
Reference Key
riquelmetoledo2019postharvestplant Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Riquelme-Toledo, Danae;Valdés-Gómez, Héctor;Fermaud, Marc;Zoffoli, Juan Pablo;
Journal Plant disease
Year 2019
DOI
10.1094/PDIS-06-19-1315-RE
URL
Keywords
Epidemiology fungi disease development and spread abiotic climate/weather effects pathogen survival

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