Effects of gamma radiation on the sterility and behavioral quality of the caribbean fruit fly, Anastrepha suspensa (Loew) (Diptera:Tephritidae)

Abstract

Pupae of Anastrepha suspensa (Loew) were irradiated 2 days before adult eclosión in an air atmosphere with 15, 20, 25, 30, 50 and 70 Gy of gamma radiation (Co-60). The radiation effects on sterility and other parameters of quality and behavior of males and females of caribfly were established. Males became fully sterile with a dose of 50 Gy and females laid no eggs when exposed to 25 Gy. Radiation had no significant effect on adult eclosion, sex ratio, flight ability and irritability, but female mortality was affected significantly by radiation, showing higher survival rates in low dosage treatments. The mating behavior of the males was reduced significantly by increasing the radiation doses.

Effect of gamma radiation on the male sterility and other quality parameters of peach fruit fly, Bactrocera zonata (Saunders) (Diptera: Tephritidae)

“…Results comparable to ours were presented for Bactrocera philippinensis Drew and Hancock with the most effective irradiation range 67-74 Gy (Resilva et al 2007), Anastrepha fraterculus (Wiedemann) (90-100 Gy) (Allinghi et al 2007), or Bactrocera cucurbitae (Coquillett), and B. zonata (70-90 Gy) (Huque, Ahmad 1966). In other studies, however, a dose to induce total sterility of fruit fly males was a little lower ranging from 40-60 Gy, for example 40 Gy was recorded for B. cucurbitae (Nahar et al 2006), 50 Gy for Anastrepha suspense Loew (Walder, Calkins 1993) and B. zonata (Draz et al 2008), or 60 Gy for Anastrepha obliqua (Macquart) (Toledo 1993). In general, the sterility dose of males seems to differ from laboratory to laboratory.…”

Optimizing Irradiation Dose for Sterility Induction and Quality of <I>Bactrocera tryoni</I>

“…Negative effects of irradiation on ßy quality have been documented for numerous tephritid species (Hooper 1975, Walder and Calkins 1993, Lux et al 2002, Barry et al 2003, Toledo et al 2004, Rull et al 2007). Furthermore, the overdosing of ßies to eliminate a minimal amount of fertility (Ͻ1%) often results in poorer sterility induction in wild populations than is achieved by ßies irradiated at a reduced dose to increase quality and competitiveness (Hooper 1972, Toledo et al 2004, Bakri et al 2005, Calkins and Parker 2005.…”

“…But such practices can diminish ultimate SIT efÞcacy if higher irradiation doses diminish ßy performance. Deleterious effects of gamma irradiation on ßy quality and competitiveness have been reported for numerous tephritid species, including C. capitata (Lux et al 2002, Barry et al 2003, Anastrepha obliqua (Macquart) (Toledo et al 2004), Anastrepha ludens (Loew) (Rull et al 2007), Anastrepha suspensa (Loew) (Walder and Calkins 1993), and Bactrocera cucumis (French) (Hooper 1975). For effective SIT, it is essential that irradiation procedures be Þne-tuned to ensure an adequate level of sterility while minimizing the deleterious effects on ßy quality and competitiveness.…”

Evaluation of Changes in Genetic Characteristics of Male Peach Fruit Fly, Bactrocera zonata Irradiated with Gamma Radiation using RAPD-PCR Technique

“…In the present study, the same findings were also occurred for fertility, where hatchability of the pest eggs was decreased with an increase in irradiation dose. This is a normal radiobiological reaction because radiation interferes with cell division in the reproductive system of the females during its initial stage of development, causing complete atrophy of the ovaries (Walder and Calkines, 1993).…”