Browsing by Author "León Antonio"

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    Evaluación preliminar de la aplicación de rayos ultravioleta c (uvc) durante el proceso de poscosecha para disminuir los daños causados por botrytis (botrytis cinerea) en rosas.
    (Ecuador: Latacunga: Universidad Técnica de Cotopaxi (UTC), 2024-08) Loachamín Tipán, Tatiana Nataly; León Antonio
    Botrytis cinerea is a fungal disease that affects export roses. Currently, the common method to minimize the damage caused by Botrytis cinerea is the use of synthetic fungicides, however, continuous and uncontrolled application generates resistance by the pathogen. This study aims to provide other control alternatives through the use of Ultraviolet Rays (UVC), as an alternative to the use of chemical products that generate cross-resistance and environmental contamination. This study was carried out at the Floricultural Company Matiz Flowers Cía. Ltda. located in the Parish of Mulaló, Canton Latacunga. The research was carried out in two phases. The first was exploratory in nature. The damage caused by UVC irradiation was evaluated at different times (0, 5, 7.5, 10, 12.5, 15 min) of exposure to the flower buds of 7 rose varieties: Mondial, Pink Floyd, Fredoom, Hermosa, Atomic, Boulevar, Sweetness. In the second phase, the effect of 6 times (0, 5, 7.5, 10, 12.5, 15 min) of exposure of the buds to UVC rays was evaluated in order to evaluate the control of Botrytis cinerea in the buds of the Mondial and Pink Floyd varieties susceptible to Botrytis cinerea and of commercial interest to the company. Initially, prior to exposure to UVC rays, the flower buds received the washing treatments normally carried out by the Company, including the chemical alternative. In the second part, the buds were only washed with water. In general, in the exploratory phase, it was determined that the Mondial variety did not show damage due to exposure to UVC rays, while the Pink Floyd variety shows burning of the petals after 5 minutes of exposure to UVC rays, however, it is one of the varieties of greatest commercial interest and susceptible to attack by Botrytis cinerea. All the treatments under study were placed in a humid chamber for 3 days and the percentage of damage and the number of spots caused by Botrytis cinerea were recorded. In general, it was determined that the longer the exposure time to UVC rays on the flower buds, the lower the number of spots caused by Botrytis cinerea in the two varieties under study during the post-harvest process. They also showed significant differences between the two varieties.