Abstract: The objective of this research was to study the ultrasonic wave characteristic at arumanis mangoes damage caused by fruit ﬂy. The ultrasonic characteristics that was used to sort the damaged mangoes from the normal mangoes were attenuation, velocity and moment zero power (Mo) number. Results showed that mean attenuation coeffcient of normal arumanis mangoes was 36.45 Np/m, mean velocity of ultrasonic wave was 518.19 m/s and Mo number was 4.58. The mean attenuation coeffcient arumanis mangoes which damaged by fruit ﬂy was 30.67 Np/m, mean velocity of ultrasonic wave was 731.72 m/s and Mo number was 6.40. Relation between the ultrasonic wave characteristic with arumanis mangoes damage caused by fruit ﬂy showed that attenuation coeffcient of arumanis mangoes was increase but damage arumanis mangoes level was decrease, while Mo number was increase in parallel with increase of damage arumanis mangoes level. The ultrasonic wave velocities of arumanis mangoes didn’t show clear correlation with damage arumanis mangoes level, as shown by from value of r2=0.01. Larva weight of inversely to value of attenuation coeffcient, correlation of logarithm value r2=0.94. Correlation value of larva weight Mo with number was r2=0.38.
Author: Warji dan Rokhani Hasbullah
Journal Code: jppertaniandd090111