“…To increase the productivity of crops and profit, plant growth regulators (PGR) were applied, such as promoting growth, rooting, falling flowers, fruits, ripening or shedding. Forchlorfenuron (1‐(2‐chloro‐4‐pyridyl)‐3‐phenylurea), one of the most widely used PGR of kiwifruit cultivation and protection, with low toxicity to human and livestock, extensive use can cause acute and chronic poisoning and irritation to the eyes and skin (Chen, Jiao et al, ; Zhang et al, ). Up to now, CPPU has been registered in many countries, the allowed residual levels for it were range from 10 to 100 µg/kg (Valverde, Aguilera, & Ferrer, ).…”