Anthracnose Disease Control and Postharvest Quality of Hass Avocado Stored in Biobased PLA/PBAT/Pine Essential Oil/Chitosan Active Packaging Nets

Abstract

For sale in the domestic market, Hass avocados are kept in non-biodegradable plastic nets and stored at an ambient temperature. The fungus Colletotrichum gloeosporioides 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 C. gloeosporioides and Rhizopus stolonifer on nutrient media and fruit and on the ripening behavior of Hass avocados at ambient temperature. The spore germination stage of C. gloeosporioides 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 CO2 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.

The Effect of Netting Bags on the Postharvest Quality, Bioactive and Nutritional Compounds, and the Spoilage Microorganisms Content of Bell Peppers

“…The methodology for fiber elaboration was proposed by Black-Solis et al [12] and Correa-Pacheco et al [13]. The fibers were extruded from a mixture of two biodegradable polymers: PLA (IngeoTM Biopolymer 7001D, NatureWorks, LLC, Blair, NE, USA) and PBAT (Ecoflex ® F Blend C1200, BASF, Mexico City, Mexico) in a 60/40 ratio (PLA/PBAT), and cactus stem flour at 3% using canola oil (Valley Foods ® , Michoacán, Mexico) at 4% as a plasticizer.…”

“…Their results showed that the antioxidant capacity was notably higher in tomatoes grown under greenhouse conditions, while the quality was maintained during storage. In addition, Correa-Pacheco et al [13] packed avocado 'Hass' fruit in similar polymeric matrix nets, but added chitosan and pine essential oils. They reported no side effects on the quality of the avocado at the end of the storage period and markedly less infection caused by the fungus Colletotrichum gloeosporioides.…”

Development of multilayer films based on PLA/PBAT and sodium alginate for active packaging

“…Ma et al used AgNPs loaded nanocrystal cellulose (NCC-Ag) to mixed with PLA/PBAT to prepare green antibacterial nanocomposites (Ma et al, 2016). Correa-Pacheco et al obtained biobased PLA/PBAT/pine essential oil/chitosan active packaging nets (Correa-Pacheco et al, 2022). Biodegradable polybutylene adipate (PBAT) containing copper oxide nanoparticles (CuONPs) was used as raw material to prepare bioactive packaging bioactive film by adding different concentrations of enzymic nanocellulose fibers (ENC).…”