found that combined salicylic acid
(0.05 mM) and ultrasound treatment (40 kHz, 8.8 W/L, 10 min)
reduced the Penicillium expansum in peach and did not impair the
quality after six days of storage at 20 C. Zhou, Feng, and Luo (2009)
demonstrated that ultrasound (21.2 kHz, 200 W/L, 2 min) enhanced
the reduction of Escherichia coli on spinach from 0.7 to 1.1 log CFU/g
sample.