SUSCEPTIBLE HOST TO DROSOPHILA SUZUKII AMONG THE SIX HOST PLANTS EXAMINED

D. suzukii is one of the most dangerous quarantine insects in the world. In this research, some of the important biological and reproductive characteristics of this fly including the average daily egg in two selective and non-selective tests, the length of larval and pupal periods, the percentage of hatching eggs, the percentage of total insect excretion and sex ratio on six different plant hosts persimmons, Clementine mandarin, Valencia oranges, Golden apple smoothie, Red apples, and pears (Mashhad) were measured in laboratory conditions. Among the studied hosts, pear contributed to the highest average egg density of 4.74 eggs per individual fly/day and a hatching percentage of (62.79%). Moreover, it exhibited a short duration of larval stages (4. 10 days) and pupation (7.76 days), the most favorable host for Drosophila suzukii was determined. In contrast, Valencia oranges were identified as the most undesirable host because of the low average egg density and egg hatching percentage (zero and 67.49%), respectively. Due to the high sensitivity of pear fruits to this pest, it is recommended to exercise prudence in the construction of new pear orchards, especially mixed with citrus.