Abstract
The sterile insect technique is used around the world to suppress or eradicate populations of Ceratitis capitata (Wiedemann) with successful results. It consists of inundative releases of sterile insects into a wide area to reduce reproduction in a field population of the same species. It is necessary to know the dispersion of the sterile males in the field in order to define the maximum distance between the release points that ensures the distribution of the sterile flies in the entire target area. The release methods may vary depending on the area to be covered and the resources available. Manual ground release requires less technology. The aim of this research was to estimate the ability of sterile males to survive and disperse in the field, in the two main areas of citrus production in Uruguay. A release of 20,000 sterile males of C. capitata TslV8 (−inv D53) was performed at the central point of each area defined for the trials. Around these points, a network of 54 Jackson traps baited with trimedlure was installed forming five concentric rings, which were placed on days 1, 3, 5, and 7 after the release and were removed at 24 h in all cases. The emergence rate, flight ability, dispersion, and longevity were estimated. The standard distances obtained by the regression models were 127 m and 131 m for Salto and San José respectively. In Salto, the traps had catches until the eighth day, and in San José, there were no catches after the sixth day.
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Acknowledgments
The authors want to thank Angelo Turra from the Universidad de la República of Uruguay, Elina Zefferino, and all the staff of the Dirección General de Servicios Agrícolas of Salto, who collaborated in the samplings, and to the citrus companies San Miguel and Citrícola Salteña S.A. for allowing us to do this research in their establishments.
Funding
This research was funded by CSIC I+D, UdelaR.
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Felicia Duarte, Iris Scatoni, Victoria Calvo, Andrea Bartolucci and Alejandro Asfennato made substantial contributions to the conception and design of the work; F. Duarte, V. Calvo, Soledad Delgado, A. Bartolucci and A. Asfennato contributed to the acquisition of data, F. Duarte, I. Scatoni, A. Borges and F. García contributed to the analysis and interpretation of data.
All authors whose names appear on the submission drafted the work or revised it critically for important intellectual content; approved the version to be published; and agree to be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved.
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Duarte, F., Calvo, M.V., Delgado, S. et al. Release-Recapture Test of Dispersal and Survival of Sterile Males of Ceratitis capitata (Diptera: Tephritidae). Neotrop Entomol 49, 893–900 (2020). https://doi.org/10.1007/s13744-020-00801-x
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DOI: https://doi.org/10.1007/s13744-020-00801-x