Abstract
Fruit flies are regarded as one of the most devastating pest of fruits and vegetables on earth planet. Generally chemical control is implemented for their control but it poses lot of eco-environmental concerns so the emphasis is now turning towards eco-friendly management practices. Bio-control is an efficient and environmentally sound approach and augmentation is primarily focus on classical biological control program. In this study, eight sub-sterilizing doses of 0, 20, 30, 40, 50, 60, 70 and 80 were tested against Bactrocera zonata and Bactrocera cucurbitae pupae. The results showed that radiation prolong the duration of pupal stage and hatching is reduced by applying radiation. This also shows that when the quantity of the radiation increases, the adult emergence decreases. This study could be very useful in exploiting the potential host for longer period of time for culturing their pupal parasitoids. Key words: Sub sterilizing doses, radiation, fruit flies and emergence.  
Highlights
Fruit flies are of significant economic importance as pest in many of the important fruits
Adult emergence percentage of B. zonata and B. cucurbitae from the one day old pupae irradiated at different doses
Radiations were applied at different doses ranging from 20 to 80 Gy to one day old pupae to check the emergence of fruit flies adults
Summary
Fruit flies are of significant economic importance as pest in many of the important fruits These are controlled generally by applying pesticides but these pesticides cause lot of environmental concerns and on human health (Gill and Garg, 2014) the fruit flies have attain resistance against pesticides (Van Steenwyck et al, 1975) so the focus is diverting towards other control practices in which sterilization using radiation is an important tool. Nuclear techniques are already being practically applied convincingly in various areas of entomology (Bakri et al., 2005). These are used against the different insect pest for suppressing the activity of insects (Faruki et al, 2005). The objective of current is to evaluate the emergence of adult fruit flies by irradiating the pupae at different doses
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