From waste to health: Valorization of agri-food by-products for the control of fresh fruit fungal postharvest decay

What if the key to keeping your strawberries fresh lies not in synthetic chemicals, but in the very waste we throw away?

Fungal diseases ravage fresh fruits after harvest, causing massive economic losses. For decades, the answer has been synthetic fungicides—but they come with a heavy price: environmental harm and safety concerns. Meanwhile, mountains of agri-food waste pile up, begging for a better purpose. What if we could solve both problems at once?

This review dives into the antifungal potential of extracts from underutilized agri-food by-products. These humble leftovers are packed with bioactive compounds—phenolics, terpenes, alkaloids, and glucosinolates—that can fight off major fruit pathogens like Botrytis cinerea, Penicillium spp., Monilinia spp., and Colletotrichum spp. The paper also outlines how to optimize extraction, using both conventional and green methods, to recover these valuable compounds.

In lab tests, these extracts inhibit fungal growth and spore germination. In real-world applications, they show promise in reducing decay in citrus, apples, strawberries, and grapes. This positions them as a sustainable, non-polluting alternative within integrated pest management strategies.

But challenges remain: expanding the spectrum of activity, exploring synergies with other methods, and navigating regulatory approval and scale-up. Still, the path from waste to health is paved with possibility.

Key Points

• Extracts from agri-food by-products fight fruit rot fungi.
• Bioactive compounds: phenolics, terpenes, alkaloids, glucosinolates.
• Promising sustainable alternative to synthetic fungicides.