3.5. Decay incidence
Gray mold is a common and serious disease which can cause significant amount of loss during storage, transportation and marketing of strawberries ( Zhang et al., 2007). Fig. 2 shows that there has been a marked increase in the number of infected strawberries during storage. No significant differences found between ultrasound treatments. However, there was a significant
difference between control and ultrasound treatments. It is possible that ultrasound treatments punctured cell walls and damaged membrane functions of molds ( Guerrero, Tognon, & Alzamora, 2005). Our results are in good agreement with Cao et al. (2010) who found that ultrasonic treatment reduced the fruit decay in strawberry.