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Articles

EFFECT OF ALTERNATIVE COATINGS AND WAXES ON POSTHARVEST QUALITY AND SHELF LIFE OF PINEAPPLES (ANANAS COMOSUS ‘MD-2’) GROWN IN COSTA RICA FOR EXPORT

Article number
906_31
Pages
245 – 251
Language
Spanish
Abstract
Antitranspirants or coatings are commercially used for export pineapples as this treatment can potentially extend the visual quality appearance.
However, few options are available that allow treatment for both conventional and organic pineapple fruits.
In this work we evaluated the effect of Natralife®, an olive oil/honeybee based coating-OMRI certified, Stafresh®, a broadly used conventional wax and two antitranspirants based on natural ingredients produced in Costa Rica (Ecofrut® and Biogreen®) that can potentially be considered organic.
Antitranspirant treatments of pineapples were applied with and without fungicide (Bayleton®). Treatments consisted of 24 pineapples per evaluation time.
Evaluations were conducted after fruit were cold stored (7-9°C) for 14, 21 and 23 days, including 1-3 days exposure at room temperature.
In general, on the first evaluation fruit showed similar quality characteristics.
Other results showed that pineapples treated with Natralife®, with or without fungicide, had the lowest weight loss.
On the second evaluation while Natralife® treated-fruit had 3.18% of weight loss, Stafresh®-treated fruits (with fungicide) had 3.72% weight loss.
In external color, Natralife® (second evaluation) and Natralife® with fungicide (second and third evaluation) showed the highest values.
The translucence (development of internal color) of Natralife®-treated fruits was lower than that of most treatments in the second evaluation, while Biogreen®, Stafresh® and the untreated control showed the highest values.
Both Stafresh® and Natralife® with fungicide showed lower values of mold development on the stem base, indicating a significant effect of the fungicide on this parameter.
Overall, in all evaluations Natralife® treatments significantly reduced the incidence and severity of fruit pitting, subsequently showing higher overall visual appearance.

Las ceras y coberturas son utilizadas en el manejo poscosecha de piña para exportación, ya que se considera que este tratamiento le puede extender la calidad visual.
En este estudio se evaluó el efecto de ceras aplicadas en tratamientos poscosecha para piña (Ananas comosus ‘MD-2’), las ceras fueron Natralife® que contiene aceite de oliva y cera de abeja con certificado OMRI (con y sin fungicida Bayleton®), Stafresh® (con y sin fungicida Bayleton®) y dos ceras naturales (Ecofrut® y Biogreen®) ambas sin fungicidas.
Las evaluaciones se realizarón luego de un almacenamiento a 7°C y 85% HR durante 14, 21 y 23 días.
Para pérdida de peso se presentó en la segunda evaluación (simulación de transporte a Europa) que Natralife® con y sin fungicida y el control tuvierón las menores pérdidas de peso (3,18, 3,12 y 3,41% respectivamente). En el desarrollo de color externo de la fruta se presentaron diferencias en la primera y tercera evaluación donde Natralife® con y sin fungicida están en el grupo de tratamientos que mayor color de fruta desarrollaron, mientras que en traslucidez interna en la primera y segunda evaluación Natralife® sin fungicida se presenta en el grupo de tratamientos que menor valor obtuvieron.
En cuanto al efecto patogénico de los tratamientos la cera comercial Stafresh® con fungicida y Natralife® con fungicida mostrarón los valores más bajos en desarrollo de moho en la base del pedúnculo para la primera y segunda evaluación, lo que indica un efecto significativo del fungicida y un comportamiento similar de Natralife® con respecto al testigo.
Para la primera y segunda evaluación los tratamientos con Natralife® (con y sin fungicida) redujerón significativamente la incidencia y la severidad de pitting en los frutículos.

Publication
Authors
D.A. Saborío, J.M. Fonseca
Keywords
color, pitting, shelf life, visual appearance
Full text
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