Postharvest decay caused primarily by fungal pathogens results in significant losses of fresh fruits during storage and transit and in the market. Controlling postharvest decay and maintaining fruit quality is important to consumers’ acceptance and the profitability of the fresh fruit industry. In this presentation, the use of antimicrobial packaging with or without modified atmosphere (MA) to control postharvest fruit decay and maintain fruit quality of fresh fruits is presented. In our research on blueberries, sulfur dioxide-emitting packaging pads, liners, sheets, or bags with MA capability were evaluated for the effectiveness in controlling decay, reducing water loss, and maintaining fruit quality. In one study, Dual SO2-emitting pad (SO2 was initially released up to 10 ppm and then declined and stabilized at a low concentration), Slow SO2-emitting pad (SO2 was released at a low and constant concentration), or MA bag alone significantly reduced fruit rots during cold storage compared to nontreated control. Dual SO2 pad in combination with MA bag or Slow SO2 pad in combination with MA bag provided even better control, but Dual SO2 pad can cause bleaching on blueberry fruit due to SO2 injuries. In another study, SO2-emitting liners with modified atmosphere capability was effective in reducing fruit rots, reducing water loss and maintaining fruit quality. Our results showed that the combination of Slow SO2-emitting pad and MAP bag is a promising method for control of postharvest fruit rots while maintaining blueberry fruit quality and that SO2-emitting liners are also an effective means of preserving blueberry quality during extended storage, particularly when combined with MA. The simplicity of assembling a package with a single liner versus using a conventional liner followed by a SO2-emitting sheet or pad could be of benefit to blueberry packers. Challenges and prospects of antimicrobial packaging for fresh fruits will also be discussed.

Antimicrobial packaging to control postharvest decay and retain fruit quality of fresh fruits

ACS Spring Meeting 2021

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.