Abstract:
The experiments of the present study were conducted under laboratory
condition were maintained at 29 ±1oC& 41 ± 5% relative humidity (RH) and
photoperiod of L12:D12 at the College of Agricultural Studies, Sudan University
of Science and Technology to study biology of the invasive fruit fly Bactrocera
invadens Drew Tsuruta and White (Diptera:Tephritidae),.
The results of the study showed that the Pre- oviposition period of B.
invadens was 2 days. Immature stages take about 20 days to reach the adult
stage. Through the study, it was found that egg hatching was found to be after
1- 2 days, larval duration for the first, second and third instars were 2, 3and 3
days respectively and the pupation period takes about 8-10 days. The sex ratio
was 4:1 female to male and adult longevity for B. invadens about 2 to 8 weeks.
The results of the study showed that B. invadens prefer certain fruits and
this was measured by examining and recording the mean of surviving larvae per
single fruit. The result was as follows 17.66 larvae in guava, 8 larvae in mango, 2
larvae in grapefruit and 1.33larvae in banana. No infestations were found in
Orange, lemon, Apple, Date palm, Grape and Sidir fruits.
