Mancozeb deposition on the fruit skin, and in particular the water-soluble metabolites like ETU(ethylene thiourea) transferred throughout the plants would be the main sources of contamination of tomato fruits.

• 代森锰锌在果皮上的沉积和在体内的转移特别是包括乙撑硫脲(ETU)的水溶性代谢物的转移是导致蕃茄果实污染的重要原因。