Ethephon Treatment Enhanced Postharvest Litchi Fruit Resistance to Peronophythora litchii by Strengthening Antioxidant Capacity and Defense Systems

Litchi downy blight, caused by Peronophythora litchii, is a major postharvest disease that leads to severe pericarp browning and fruit decay, significantly reducing market quality. Strengthening the fruit’s innate defense systems represents a promising strategy for mini- mizing these losses. This study investigated the efficacy and underlying mechanisms of ethephon treatment in controlling postharvest litchi downy blight. The results showed that treatment with 400 mg·L−1 ethephon solution via...