Evaluación in vitro del quitosano y aceites esenciales para el control de dos especies patógenas de Colletotrichum aisladas de aguacate (Persea americana Mill)

Abstract

La actividad antifúngica del quitosano, aceites esenciales (canela y eucalipto) y su combinación fueron evaluadas contra dos patógenos Colletotrichum acutatum y Colletotrichum gloeosporioides aislados de aguacate (Persea americana Mill). Se utilizó quitosano a diferentes concentraciones (0.1, 0.5 y 1.0%). Las concentraciones de aceites esenciales evaluadas fueron 0.1, 0.5 y 2.0% (eucalipto y canela). El efecto de la combinación del quitosano con los aceites esenciales se evaluó utilizando las concentraciones más eficaces del quitosano (0.1 y 0.5%) y el aceite esencial de eucalipto y canela con el mayor efecto inhibitorio (2%). Los tratamientos de quitosano y aceites esenciales cada uno por separado fueron parcialmente efectivos para evitar el desarrollo de las cepas evaluadas, inhibiendo el crecimiento micelial en un rango de 17 a 21% y 18 a 50% respectivamente. Por lo contrario, el crecimiento micelial de ambas cepas fue totalmente reducido mediante la aplicación combinada del quitosano (0.1%) con aceite esencial de canela (2%), sin embargo; la combinación del quitosano con aceite esencial de eucalipto no fue efectiva. Hasta donde sabemos, esta investigación es la primera que informa sobre cepas de Colletotrichum resistentes al quitosano aisladas de frutos de aguacate.

Improving the Shelf Life of Avocado Fruit against Clonostachys rosea with Chitosan Hybrid Films Containing Thyme Essential Oil

“…To the best of our knowledge, few investigations have been performed on the antifungal in situ effects of hybrid films containing essential oils in avocadoes. Nevertheless, Chávez-Magdaleno et al [ 32 ] performed similar in vitro experiments to those of our investigation. However, these authors measured the radial growth of wild strains of Colletotrichum sp.…”

Antifungal Activity of Rue Essential Oil and Commercial Chitosan on Native Corn Foliar Diseases

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Fungistatic Films Containing Cinnamon Essential Oil: New Coatings to Preserve the Nutraceutical Content of Avocado Fruit against Fusariosis

“…[3] The main nutraceuticals of avocadoes are those classified as unsaturated fatty acids. [4] The quality of avocadoes may decrease because of several biotic and abiotic factors during the postharvest period. [5] In this context, postharvest fungal diseases triggered by Sphaceloma Lasiodiplodia, Colletotrichum, Rhizopus, Pseudocercospora, and Fusarium genera are the main threat to the avocado market.…”

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