Influence of different hosts on biological parameters of the fruit fly Ceratitis capitata  (Diptera: Tephritidae) in Tunisia

Ghabbari, Mabrouka; Jemâa, Jouda Médiouni Ben

doi:10.56027/joasd.052022

Cited by 2 publications

(17 citation statements)

References 29 publications

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“…We estimated ν A and μ A from the data provided on peach development [44] as follows. Since [44][Table 2], and, the proportion of hatched eggs that become adults is 66.09% [44][Table 3], this means that , that is and μ A = 0.0187. Similarly, we deduce that b W = 13.19 × 0.92 = 12.135 [44][Tables 1 and 3].…”

Section: Resultsmentioning

confidence: 99%

“…Little literature exists on development parameters from fruit host rather than artificial diet. Big variations can occur according to the host, citrus or clementine having lower developmental rate and longer duration but a higher adult lifespan, as compared to peach hosts [44].…”

Section: Resultsmentioning

confidence: 99%

“…We estimated ν A and μ A from the data provided on peach development [20] as follows. Since such that ν A + μ A ≈ 0.0497 such that since ν A = 0.027, we deduce that μ A = 0.0227.…”

Section: Application and Discussionmentioning

confidence: 99%

“…Since such that ν A + μ A ≈ 0.0497 such that since ν A = 0.027, we deduce that μ A = 0.0227. Then, the proportion of non-adult individuals that become adults is given by 0.6609 [20][Table 3]. Thus only 66.03% of the hatched eggs become adults, that is, that is ν A = 0.0328 and μ A = 0.0169.…”

Section: Application and Discussionmentioning

confidence: 99%

“…We estimated ν A and µ A from the data provided on peach development [44] as follows. Since 1 and 3].…”

Section: Parameterization and Simulationsmentioning

confidence: 99%

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On the impact of re-mating and residual fertility on the Sterile Insect Technique efficacy: case study with the medfly, Ceratitis capitata

DUMONT,

OLIVA

2023

Preprint

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Sterile insect techniques can be an efficient solution for reducing or eliminating certain insect pest populations. It is widely and efficiently used in agriculture against fruit flies, including the Mediterranean fly, Ceratitis capitata. The re-mating tendency of medfly females and the fact that sterile males are often released with slight residual fertility can at first sight appear to be detrimental for the successful implementation of SIT. Obtaining the right balance between sterility level and male quality is the key to a cost-efficient program. Since field experimental approaches can be impacted by many environmental variables, it is difficult to get a clear understanding on how some specific parameters can affect, alone or in combination, the efficacy of sterile males release. The use of models not only helps to gather knowledge, but it also helps simulating different situations scenarii and can be easily adapted to local values from the field population and sterile male production. In this study, we consider how the minimal release ratio is affected by female re-mating rate (with an equal or higher tendency to re-mating after an insemination by a sterile male) and male residual fertility. Different scenarios were explored: continuous versus periodic releases, with and without ginger aromatherapy, which is known to enhance sterile male competitiveness. Parameters values were chosen from the literature on peach host fruit when available to reflect what could be expected in the Corsican context, for which SIT against the medfly is under consideration. Our results clearly show that low residual fertility is not necessarily detrimental to SIT performance. In contrast, re-mating of wild females provides contrasting results: when re-mating occurs without a change in the refractory period, it is beneficial because it requires the releases of less sterile males. On the other hand, if females mated with a sterile male have a faster re-mating, it is detrimental for the SIT program as the amount of sterile males to release can become too large. We also confirmed that the use of ginger aromatherapy is more than an essential step for SIT success against medfly. Our model can be easily adapted to different context and species, in order to help understanding release strategies and guiding decision making.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…We estimated ν A and μ A from the data provided on peach development [20] as follows. Since such that ν A + μ A ≈ 0.0497 such that since ν A = 0.027, we deduce that μ A = 0.0227.…”

Section: Application and Discussionmentioning

confidence: 99%

Section: Application and Discussionmentioning

confidence: 99%

“…We estimated ν A and µ A from the data provided on peach development [44] as follows. Since 1 and 3].…”

Section: Parameterization and Simulationsmentioning

confidence: 99%

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On the impact of re-mating and residual fertility on the Sterile Insect Technique efficacy: case study with the medfly, Ceratitis capitata

DUMONT,

OLIVA

2023

Preprint

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On the impact of re-mating and residual fertility on the Sterile Insect Technique efficacy: Case study with the medfly, Ceratitis capitata

Dumont,

Oliva

2024

PLoS Comput Biol

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The sterile insect technique (SIT) can be an efficient solution for reducing or eliminating certain insect pest populations. It is widely used in agriculture against fruit flies, including the Mediterranean fruit fly (medfly), Ceratitis capitata. The re-mating tendency of medfly females and the fact that the released sterile males may have some residual fertility could be a challenge for the successful implementation of the SIT. Obtaining the right balance between sterility level and sterile male quality (competitiveness, longevity, etc) is the key to a cost-efficient program. Since field experimental approaches can be impacted by many environmental variables, it is difficult to get a clear understanding on how specific parameters, alone or in combination, may affect the SIT efficiency. The use of models not only helps to gather knowledge, but it allows the simulation of a wide range of scenarios and can be easily adapted to local populations and sterile male production. In this study, we consider single- and double-mated females. We first show that SIT can be successful only if the residual fertility is less than a threshold value that depends on the basic offspring number of the targeted pest population, the re-mating rates, and the parameters of double-mated females. Then, we show how the sterile male release rate is affected by the parameters of double-mated females and the male residual fertility. Different scenarios are explored with continuous and periodic sterile male releases, with and without ginger aromatherapy, which is known to enhance sterile male competitiveness, and also taking into account some biological parameters related to females that have been mated twice, either first by a wild (sterile) male and then a sterile (wild) male, or by two wild males only. Parameter values were chosen for peach as host fruit to reflect what could be expected in the Corsican context, where SIT against the medfly is under consideration. Our results suggest that ginger aromatherapy can be a decisive factor determining the success of SIT against medfly. We also emphasize the importance of estimating the duration of the refractory period between matings depending on whether a wild female has mated with a wild or sterile male. Further, we show the importance of parameters, like the (hatched) eggs deposit rate and the death-rate related to all fertile double-mated females. In general, re-mating is considered to be detrimental to SIT programs. However, our results show that, depending on the parameter values of double-mated females, re-mating may also be beneficial for SIT. Our model can be easily adapted to different contexts and species, for a broader understanding of release strategies and management options.

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Influence of different hosts on biological parameters of the fruit fly Ceratitis capitata (Diptera: Tephritidae) in Tunisia

Cited by 2 publications

References 29 publications

On the impact of re-mating and residual fertility on the Sterile Insect Technique efficacy: case study with the medfly, Ceratitis capitata

On the impact of re-mating and residual fertility on the Sterile Insect Technique efficacy: case study with the medfly, Ceratitis capitata

On the impact of re-mating and residual fertility on the Sterile Insect Technique efficacy: Case study with the medfly, Ceratitis capitata

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