Fluoroglycofen, a post-emergence herbicide used in vineyards to eradicate weeds, has previously been shown to turn grape leaves dark green following its use. It belongs to diphenyl ether herbicide, it is a protoporphyrin oxidase inhibitor. Once it is absorbed by plants, it can only work under light conditions. The compound reacts with molecular chlorine to form tetrapyrrole, which is toxic to plant cells, and accumulates to act. In the process of accumulation, the plant cell membrane completely disappeared, and then caused the leakage of cell contents.