ORIGINAL ARTICLE
UV-C radiation for control of gray mold disease in postharvest cut roses
Katherine Vega 1, A-D,   Samuel Ochoa 1, A-D,   Luis F. Patiño 1, A,C-F,   Jorge A. Herrera-Ramirez 2, C-E,   Jorge A. Gómez 3, C,E,   Jairo C. Quijano 3, A,C-F  
 
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1
Agricultural Sciences Faculty, Politécnico Colombiano Jaime Isaza Cadavid, Medellín, Colombia
2
Engineering Faculty, Instituto Tecnológico Metropolitano, Medellín, Colombia
3
Basic Sciences Faculty, Politécnico Colombiano Jaime Isaza Cadavid, Medellín, Colombia
A - Research concept and design; B - Collection and/or assembly of data; C - Data analysis and interpretation; D - Writing the article; E - Critical revision of the article; F - Final approval of article
CORRESPONDING AUTHOR
Jairo C. Quijano   

Basic Sciences Faculty, Politécnico Colombiano JIC, Carrera 48 No. 7 – 151, 050022, Medellín, Colombia
Submission date: 2020-05-16
Acceptance date: 2020-07-10
Online publication date: 2020-10-22
 
Journal of Plant Protection Research 2020;60(4):351–361
 
KEYWORDS
TOPICS
ABSTRACT
The shipment of cut flowers from Colombia and Ecuador to the United States, the biggest importer of this product in the world, has doubled in the last 20 years. One of the main constraints in cut roses production is the gray mold disease caused by the fungus Botrytis cinerea, which can destroy the flowers, in the crop, during storage and/or shipping. Since the resistance of the fungus to conventional fungicides has been increasing, as well as the health effects in rose growers, alternative approaches for controlling the disease are needed. The effect of UV-C light on the gray mold development in cut roses was studied. Irradiation with 2,160; 1,080 and 540 J ⋅ m–2 UV-C, every 24 h for 5 days in a humid chamber, did not harm the roses. Instead, as seen by image analysis, a highly significant reduction of the area of the lesions by the disease and of the fungus germination was obtained at 1,080 J ⋅ m–2. The addition of a 4-h dark period to the irradiation did not improve the effect of UV-C on the disease. The results of this work potentiate the use of UV-C light in the agro-industry as a low-cost and non-invasive alternative method to control diseases. They also reflect the application of optical approaches as image analysis in the evaluation of important agricultural features.
CONFLICT OF INTEREST
The authors have declared that no conflict of interests exist.
FUNDING
The authors are grateful to the company Inversiones Coquette S.A for supplying the roses for the experiments and with the Politécnico Colombiano Jaime Isaza Cadavid for funding [grant number 2061080336].
 
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