Anthracnose Disease Control and Postharvest Quality of Hass Avocado Stored in Biobased PLA/PBAT/Pine Essential Oil/Chitosan Active Packaging Nets
Zormy N. Correa-Pacheco | Rosa I. Ventura-Aguilar | Leonor Zavaleta-Avejar | Laura L. Barrera-Necha | Mónica Hernández-López | Silvia Bautista-Baños
For sale in the domestic market, Hass avocados are kept in non-biodegradable plastic nets and stored at an ambient temperature. The fungus <i>Colletotrichum gloeosporioides</i> can cause important losses at this stage. Consequently, formulations based on polylactic acid (PLA)/poly (butylene adipate-co-terephthalate) (PBAT) 60/40 biodegradable blends added with pine essential oil (PEO) at 10, 12, 14, and 20% and coated with 1% chitosan (CH) were used for the elaboration of nets, which were evaluated on <i>C. gloeosporioides</i> and <i>Rhizopus stolonifer</i> on nutrient media and fruit and on the ripening behavior of Hass avocados at ambient temperature. The spore germination stage of <i>C. gloeosporioides</i> was the most extensively damaged (78% inhibition). The incidence of anthracnose was notably reduced by almost 80% in the avocados stored in the 60/40 PLA/PBAT nets coated with 1% CH. The overall values regarding weight loss, °Brix, and dry matter were c.a. 23.5%, 7.5, and 24.5%, respectively. The changes in firmness, color, and CO<sub>2</sub> production were particularly associated with the initial harvest index and storage temperature rather than with the nets. In future research, essays on nets should include evaluations at the commercial levels.
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