Control of anthracnose caused by Colletotrichum species in guava, mango and papaya using synergistic combinations of chitosan and Cymbopogon citratus (D.C. ex Nees) Stapf. essential oil

An Analysis of the Published Literature on the Effects of Edible Coatings Formed by Polysaccharides and Essential Oils on Postharvest Microbial Control and Overall Quality of Fruit

“…CH used in most of these studies had similar deacetylation degree (that is, ≥75%). Seven studies used medium molecular weight (MW) CH (Aloui et al., ; Athayde et al., ; Barreto et al., ; de Oliveira, Berger, de Araújo, Câmara, & de Souza, ; dos Santos et al., ; Oliveira, de Oliveira, Vieira, Câmara, & de Souza, ; Sun et al., ) and two studies used high MW CH (Cháfer, Sánchez‐González, González‐Martínez, & Chiralt, ; Perdones, Sánchez‐González, Chiralt, & Vargas, ). Eight studies did not cite the MW of tested CH (Azevedo et al., ; de Aquino et al., ; Sánchez‐González et al., ; Shao et al., ; Vu, Hollingsworth, Leroux, Salmieri, & Lacroix, ; Xing et al., ; Xing et al., , ).…”

“…Twenty‐four out of the 30 selected studies used EOs for the formulation of edible coatings, such as the EO from cinnamon (Etemadipoor et al., ; Maqbool et al., ; Xing, Li et al., ; Xing et al., , ), lemongrass (Athayde et al., ; Maqbool et al., ; Oliveira et al., ; Vu et al., ; Yousuf & Srivastava, ), peppermint (de Oliveira et al., ; Guerra et al., , ; Vu et al., ), bergamot (Aloui et al., ; Cháfer et al., ; Sánchez‐González et al., ), oregano (Andrade et al., ; Barreto et al., ; dos Santos et al., ; Rodriguez‐Garcia et al., ; Vu et al., ), rosemary (Andrade et al., ), clove (Shao et al., ), thyme (Bosquez‐Molina et al., ; Cháfer et al., ), tea tree (Cháfer et al., ), Mexican lime (Bosquez‐Molina et al., ), and Lippia gracilis (Azevedo et al., ; de Aquino et al., ). Only five studies used ICs to formulate edible coatings, to cite: carvacrol (de Souza et al., ; Sun et al., ), cinnamaldehyde and trans ‐cinnamaldehyde (Sun et al., ), thymol (Gniewosz & Synowiec, ), citral and eugenol (Guerreiro et al., ), and limonene (Vu et al., ).…”

“…The studies have ordinarily used sub‐MICs of these substances/compounds to formulate the coatings (de Oliveira et al., ; de Souza et al., ; Guerra et al., , ; Oliveira et al., ). Only five studies did not perform in vitro assays to select the concentrations of EOs or ICs used to formulate the coatings (Cháfer et al., ; Etemadipoor et al., ; Perdones et al., ; Xing et al., 2011; Xing et al., ) and two studies used the same concentration in both in vitro and in situ assays (Maqbool et al., ; Rodriguez‐Garcia et al., ), which were selected considering data of previous published studies.…”

“…CH‐coating forming dispersions were usually prepared by dissolving this polymer in an aqueous 0.1 M acetic acid solution under stirring (mostly 150 rpm) for a variable time period, to cite: 1 hr (Xing et al., 2011; Xing et al., , ), 6 hr (Guerra et al., ), 12 hr (Aloui et al., ; Sánchez‐González et al., ), or 24 hr (Athayde et al., ; de Oliveira et al., ; de Souza et al., ; dos Santos et al., ; Oliveira et al., ). Some studies have used an overnight stirring (Cháfer et al., ; Sun et al., ; Vu et al., ) or have not reported the stirring time (Azevedo et al., ; de Aquino et al., ; Perdones et al., ; Shao et al., ).…”

“…The stirring of CH‐coating forming dispersions has been mostly performed at room temperature (Athayde et al., ; Cháfer et al., ; de Oliveira et al., ; de Souza et al., ; dos Santos et al., ; Guerra et al., ; Oliveira et al., ; Sun et al., ; Vu et al., ; Xing et al., 2011; Xing et al., , ), although two studies have performed this operation at 40 °C (Aloui et al., ; Sánchez‐González et al., ). Four studies have not reported the stirring temperature (Azevedo et al., ; de Aquino et al., ; Perdones et al., ; Shao et al., ).…”