Effect of Different Media on some Biological Aspects of the Immature Stages of the Peach Fruit Fly Bactrocera Zonata (Saunders) (Diptera: Tephritidae)
The results of this study showed that the effect of the development period of immature stages of peach fruit fly on some types of food medium. Three types of citrus fruits (mandarin, orange and bitter orange) were used as natural food media in addition to the use of an industrial media As for the least development period, it was 6.67 days in the treatment in which the artificial nutrient media was used, with significant differences from the rest of the treatments. The results also showed that the highest period of the parthenogenesis for B. zonata fly reached 12.67 days in the treatment in which the fruits of the mandarin were used, which differed significantly from the rest of the treatments. The minimum period of development of the parthenogenesis was 9.00 days for the treatment of local Citrus aurantium. It also became clear from the results that the highest life span, which is the period from egg to adult emergence, was 23 days in the treatment of mandarin fruits, which differed significantly from the rest of the treatments. This study recorded the effect of the media type on some of the life indicators represented in the number of pupae and the number of emerging adults. The highest rate of the emerging adults reached 154.3 adults for the treatment of the nutrient media, while the lowest rate for the adults was 9.00 adults in the treatment of the local Citrus aurantium fruits. The results indicate that the effect of the type of nutritional media on the sex ratio of B. zonata, and the sex ratio of the peach fruit fly was characterized by the superiority of the proportion of females over males in all treatments except for the treatment in which the fruits of the local bitter orange were used, which showed superiority for males.