Effects of Irradiation on the Courtship Behavior of Medfly (Diptera, Tephritidae) Mass Reared for the Sterile Insect Technique

Lux, Sławomir A.; Vilardi, Juan C.; Liedo, Pablo; Gaggl, K.; Calcagno, G.; Munyiri, Florence N.; Vera, M. Teresa; Manso, F.

doi:10.1653/0015-4040(2002)085[0102:eoiotc]2.0.co;2

Cited by 108 publications

(131 citation statements)

References 19 publications

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“…Sterile males had reduced pheromone-calling activity compared with fertile males, which may explain why sterile males were less successful in attracting mates. This result is consistent with the observation that sterilization negatively affected male courtship (Papadopoulos et al 1998;Lux et al 2002;but see Liimatainen et al 1997) and pheromone composition (Heath et al 1994).…”

Section: Discussionsupporting

confidence: 92%

“…Third, the radiation dose used in SIT programmes varies between 10 and 15 krad (e.g. Lux et al 2002), and higher doses than used in our study could reduce the mating competitiveness of the sterile males even further. Therefore, the poor mating success of sterile males in real SIT programmes represents a more significant problem than shown in our model.…”

Section: Discussionmentioning

confidence: 83%

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Effects of male sterility on female remating in the Mediterranean fruitfly, Ceratitis capitata

Kraaijeveld

Chapman

2004

Proc. R. Soc. Lond. B

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Mating-induced reductions in female receptivity are common in insects. These responses are of interest because of their utility in insect pest control. In addition, the control of receptivity is likely to be the subject of sexual conflict over remating frequency. We investigated the specif ic effect of male sterility on female receptivity in an important pest species, the Mediterranean fruitfly (medfly), in which sterile males are often used for population suppression. Sterile males performed less courtship, obtained signif icantly fewer f irst and second matings than fertile males, and reduced female receptivity signif icantly less effectively than did fertile males. We modelled the likelihood of fertile matings and show that the low mating success of sterile males represents a signif icant problem for medfly sterile insect technique (SIT) programmes.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 83%

Effects of male sterility on female remating in the Mediterranean fruitfly, Ceratitis capitata

Kraaijeveld

Chapman

2004

Proc. R. Soc. Lond. B

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“…At a constant number of non-treated males in mating trials, egg hatch decreased significantly when a proportion of treated males increased. The observed values of egg hatch were greater than those of expected ones in all variants, however, significant difference (1 df; P < 0.05) was only observed for the 5:1:1 sex ratio Lux et al 2002). In the competitiveness test, we did not use a dose of 90 Gy, because at this dose total sterility was observed and SIT depends on releases of sub-sterilized, not completely sterile males.…”

Section: Flight Ability Testmentioning

confidence: 81%

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

Mahmoud¹,

Barta²

2011

Hort. Sci. (Prague)

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Mahmoud M.F., Barta M., 2011. Effect of gamma radiation on the male sterility and other quality parameters of peach fruit fly, Bactrocera zonata (Saunders) (Diptera: Tephritidae). Hort. Sci. (Prague), 38: 54-62.Bactrocera zonata, a serious pest of fruits in many parts of the world, has recently been recorded in Northern Africa. Even though it has not been introduced to the European continent yet, a strong emphasis is being placed on developing effective measures to suppress this pest and to prevent it from establishing in neighbouring European countries. The sterile insect technique is widely used in integrated programmes against tephritid fruit flies and, in this paper, quality parameters of irradiated B. zonata were evaluated for possible use of sterile insect technique within the management of this pest. Pupae were irradiated ( 60 Co) 48 h before adult emergence (in an air atmosphere) with doses of 10, 30, 50, 70 or 90 Gy. While adult emergence and egg hatch decreased with increasing dose, no significant differences in female fecundity were found among doses. Exposure of pupae to 90 Gy resulted in a total sterility of eggs laid by non-treated females crossed with treated males. Only insignificant difference in the radiation effect on female fecundity was found. Moderate effects on sex ratio and size were recorded, as they decreased gradually by increasing doses. No considerable effect on flying capability was observed, but generally, the percentage of fliers decreased with increasing radiation doses. Fried's competitiveness values of treated males (30 and 70 Gy) suggest that irradiated males compete successfully with non-irradiated ones.

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“…When a female mates with a sterile male, it has no offspring; thus, the next generation's population is reduced. Various studies have shown that although sterile mass-reared medflies do join mating aggregations ('leks'), they are clearly disadvantaged compared with wild males when competing for wild females (McInnis et al, 1996;Lance et al, 2000;Cayol, 2000;Lux et al, 2002). Consequently, there is a need to improve the competitive ability of the released sterile medfly males to enhance the effectiveness of SIT control programs.…”

Section: Introductionmentioning

confidence: 99%

Manipulation of the microbiota of mass-reared Mediterranean fruit flies Ceratitis capitata (Diptera: Tephritidae) improves sterile male sexual performance

2009

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The sterile insect technique (SIT) is a method of biological control whereby millions of factory reared sterile male insects are released into the field. This technique is commonly used to combat the Mediterranean fruit fly (Ceratitis capitata, Diptera: Tephritidae). Sterile medfly males are less competent in attracting and mating with wild females, a property commonly linked to the irradiation process responsible for the sterilization. As bacteria are important partners in the fly's life cycle, we used molecular analytical methods to study the community structure of the gut microbiota in irradiated male medflies. We find that the sterilizing irradiation procedure affects the gut bacterial community structure of the Mediterranean fruit fly. Although the Enterobacteriaceae family remains the dominant bacterial group present in the gut, the levels of Klebsiella species decreases significantly in the days after sterilization. In addition, we detected substantial differences in some bacterial species between the mass rearing strain Vienna 8 and the wild strain. Most notable among these are the increased levels of the potentially pathogenic species Pseudomonas in the industrial strain. Testing the hypothesis that regenerating the original microbiota community could result in enhanced competitiveness of the sterile flies, we found that the addition of the bacterial species Klebsiella oxytoca to the postirradiation diet enables colonization of these bacteria in the gut while resulting in decreased levels of the Pseudomonas sp. Feeding on diets containing bacteria significantly improved sterile male performance in copulatory tests. Further studies will determine the feasibility of bacterial amelioration in SIT operations.

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Effects of Irradiation on the Courtship Behavior of Medfly (Diptera, Tephritidae) Mass Reared for the Sterile Insect Technique

Abstract: BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.

Cited by 108 publications

References 19 publications

Effects of male sterility on female remating in the Mediterranean fruitfly, Ceratitis capitata

Effects of male sterility on female remating in the Mediterranean fruitfly, Ceratitis capitata

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

Manipulation of the microbiota of mass-reared Mediterranean fruit flies Ceratitis capitata (Diptera: Tephritidae) improves sterile male sexual performance

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