The coastal and saline-affected regions of the Mekong Delta—such as Cà Mau, Bạc Liêu, and Sóc Trăng—have hot, humid climates that accelerate post-harvest spoilage, especially of vegetables, which are prone to rot, mold, and wilting under normal conditions. In response, Vietnamese researchers have developed biodegradable films made from natural materials such as cassava starch, chitosan, and pangasius fish gelatin—a solution that is both effective and environmentally friendly.

These films form a thin coating around vegetables, limiting water loss and preventing microbial intrusion. When combined with essential oils like lemongrass, cinnamon, or garlic, they also exhibit natural antimicrobial properties. When applied to vegetables like mustard greens, okra, and water spinach, freshness can be extended by 5 to 7 days without refrigeration.

This solution is particularly suitable for areas lacking stable electricity or cold storage facilities. If mass-produced at low cost, these biodegradable films could replace plastic packaging entirely, helping reduce agricultural plastic waste.

This presents a golden opportunity for the Mekong Delta to develop a biopackaging industry that not only supports agriculture but also contributes to sustainable economic and ecological value.