title: Preharvest bagging with wavelength-selective materials enhances development and quality of mango (Mangifera indica L.) cv. Nam Dok Mai #4.
abstract: BACKGROUND
  Preharvest bagging has been shown to improve development and quality of fruits. Different light transmittance bags showed different effects on fruit quality. This study presents the benefits of using newly developed plastic bagging materials with different wavelength-selective characteristics for mangoes (cv. Nam Dok Mai #4). Mangoes were bagged at 45 days after full bloom (DAFB) and randomly harvested at 65, 75, 85, 95, and 105 DAFB. The bags were removed on the harvest days. The wavelength-selective bags (no pigment, yellow, red, blue/violet, blue) were compared with the Kraft paper bag with black paper liner, which is currently used commercially for several fruits, and with non-bagging as a control.
  
  
  RESULTS
  Bagging significantly (p⩽0.05) reduced diseases and blemishes. Mango weight at 95 DAFB was increased approximately 15% by VM and V plastic bagging, as compared to paper bagging and control. Plastic bagging accelerated mango ripening as well as growth. Plastic-bagged mangoes reached maturity stage at 95 DAFB, while non-bagged mangoes reached maturity stage at 105 DAFB. Paper bagging resulted in a pale-yellow peel beginning at 65 DAFB, while plastic bagging improved peel glossiness.
  
  
  CONCLUSIONS
  Preharvest bagging with different wavelength-selective materials affected mango development and quality. Bagging mangoes with VM and V materials could reduce peel defects and diseases, increase weight, size, and sphericity, improve peel appearance, and shorten the development periods of mangoes. The results suggest a favorable practice using the newly developed VM and V plastic bags in the production of mangoes, and possibly other fruits as well.
authors.affiliation: Department of Packaging and Materials Technology, Faculty of Agro-Industry, Kasetsart University, Bangkok 10900, Thailand. vanee.c@ku.ac.th
authors.forename: Vanee
authors.initials: V
authors.lastname: Chonhenchob
authors.forename: Damrongpol
authors.initials: D
authors.lastname: Kamhangwong
authors.forename: Jittiporn
authors.initials: J
authors.lastname: Kruenate
authors.forename: Krittaphat
authors.initials: K
authors.lastname: Khongrat
authors.forename: Nantavat
authors.initials: N
authors.lastname: Tangchantra
authors.forename: Uthai
authors.initials: U
authors.lastname: Wichai
authors.forename: S Paul
authors.initials: SP
authors.lastname: Singh
mesh_terms: D000383:Agriculture / Q000379:methods*; D003116:Color; D003624:Darkness; D005638:Fruit / Q000254:growth & development / Q000528:radiation effects* / Q000592:standards; D008027:Light; D031022:Mangifera / Q000254:growth & development / Q000528:radiation effects*; D010935:Plant Diseases / Q000517:prevention & control*; D010969:Plastics
chemical_list: D010969:Plastics