Abstract: In order to evaluate the safety of paclobutrazol applied in peach orchards，the terminal residues in mature fruits of 3 peach varieties with different dosage by soil application（0.0375–0.225g · m^-2）or different consentration by foliar spraying of paclobutrazol were investigated by GC–MS–MS in 2010 and 2011. The results showed that only one treatment with higher foliar spraying concentration（1 250 mg · L^-1 sprayed 2 times）in green-house peach experiment led to the residue amount in mature peach fruits over 0.5 mg · kg^-1，the residue amount of another treatment was less than 0.5 mg · kg^-1，most treatments of soil application was even below 0.05 mg · kg^-1. If according to MRL ≤ 0.5 mg · kg^-1 of paclobutrazol in peach（current MRL of EU），based on canopy projection area，different dosage by soil application（0.0375–0.225 g · m^-2），the residues in mature fruits do not exceed the allowed figure；Paclobutrazol applied by canopy spraying with no higher than 1 500 mg · L^-1 in open orchard or 1 000mg · L^-1 in green-house peach，and no more than 2 times，the residues in mature fruits do not exceed the standard，either.

Key words: peach, paclobutrazol, residue