Release-Recapture Test of Dispersal and Survival of Sterile Males of Ceratitis capitata (Diptera: Tephritidae)
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Release-Recapture Test of Dispersal and Survival of Sterile Males of Ceratitis capitata (Diptera: Tephritidae) F DUARTE1,2 , MV CALVO1 , S DELGADO1 , A BARTOLUCCI3, A ASFENNATO3, A BORGES4 , I SCATONI1 , FM GARCÍA5 1
Depto de Protección Vegetal, Facultad de Agronomía, UDELAR, Montevideo, Uruguay División Protección Agrícola, Dirección General de Servicios Agrícolas, Ministerio de Ganadería Agricultura y Pesca, Montevideo, Uruguay 3 Instituto de Sanidad y Calidad Agropecuaria de Mendoza, Mendoza, Argentina 4 Depto de Biometría, Estadística y Cómputos, Facultad de Agronomía, UDELAR, Montevideo, Uruguay 5 Lab de Ecologia de Insetos, Instituto de Biologia, Depto de Zoologia e Genética, Universidade Federal de Pelotas, Pelotas, Brazil 2
Keywords SIT, fruit fly, medfly, pest management Correspondence F Duarte, División Protección Agrícola, Dirección General de Servicios Agrícolas, Ministerio de Ganadería Agricultura y Pesca, Montevideo, Uruguay; [email protected] Edited by Diego F Segura – IGEOF-INTA, Argentina Received 14 February 2020 and accepted 9 July 2020 * Sociedade Entomológica do Brasil 2020
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.
Introduction Ceratitis capitata (Wiedemann) is a major pest of worldwide fruit and vegetable production with a host range that exceeds 350 species (Liquido et al 1991). In addition to the direct injury it causes to fruits, the quarantine pest status of this species in several export destination markets imposes serious economic losses to fruit growers. The sterile insect technique (SIT) is widely used around the world to suppress or eradicate
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