Host Suitability and Fitness-Related Parameters in Coptera haywardi (Hymenoptera: Diapriidae) Reared on Irradiated Ceratitis capitata (Diptera: Tephritidae) Pupae Stemming From the tsl Vienna-8 Genetic Sexing Strain

Author:

Núñez-Campero Segundo R1ORCID,Suárez Lorena23,Buonocore Biancheri María Josefina4,Cancino Jorge5,Murúa Fernando236,Molina Diego3,Laría Osvaldo23,Aluja Martín7,Ovruski Sergio M4ORCID

Affiliation:

1. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja (CRILAR), Provincia de La Rioja, UNLAR, SEGEMAR, UNCa, CONICET, Entre Ríos y Mendoza, Anillaco, La Rioja, Argentina

2. Programa de Control y Erradicación de Mosca de los Frutos de San Juan (ProCEM-San Juan), Nazario Benavides 8000 Oeste (CPA J5413ZAD), Chimbas, San Juan, Argentina

3. Dirección de Sanidad Vegetal, Animal y Alimentos (DSVAA), Nazario Benavides 8000 Oeste (CPA J5413ZAD), Chimbas, San Juan, Argentina

4. LIEMEN, División Control Biológico de Plagas, PROIMI Biotecnología, Avda. Belgrano y Pje. Caseros, (T4001MVB) San Miguel de Tucumán, Argentina

5. Programa Moscafrut SADER-IICA, camino a los Cacahoatales s/n, Metapa de Dominguez, Chiapas, México

6. IMCN-Diversidad de Invertebrados, Departamento de Biología, UNSJ, Av. Ignacio de la Rosa 590 Oeste; Rivadavia, San Juan, Argentina

7. Clúster Científico y Tecnológico BioMimic®, Red de Manejo Biorracional de Plagas y Vectores, Instituto de Ecología, A.C. -INECOL, Carretera Antigua a Coatepec 351, El Haya, Xalapa, Veracruz, México

Abstract

Abstract Coptera haywardi (Ogloblin) is a pupal endoparasitoid of tephritid flies with great potential as a biological control agent worldwide as it does not attack other Diptera. To reach its full potential, its mass rearing needs to be enhanced lowering costs. Here, we focused on the use of irradiated pupae of Ceratitis capitata (Wiedemann) stemming from the temperature-sensitive lethal (tsl) Vienna-8 genetic sexing strain (= CcVienna-8), which is mass-produced in the San Juan Medfly and Parasitoid Mass Rearing Facility in Argentina. Exposure of 1- to 2-d-old CcVienna-8 pupae irradiated at 90 Gy to 6- to 8-d-old C. haywardi females at a 10:1 host/parasitoid ratio for 24 h turned out to be highly successful for the rearing of this parasitoid. High radiation doses (90–100 Gy) did not adversely influence fitness parameters of C. haywardi offspring F1, namely lifetime reproductive rates, adult life expectancy, and survival time. Demographic parameters in C. haywardi F1 from irradiated CcVienna-8 young pupae were improved compared to those values recorded from parasitoid originated from nonirradiated CcVienna-8 pupae. These findings will help to enhance parasitoid mass rearing for augmentative releases against medfly in Argentinean fruit-producing regions.

Funder

International Atomic Energy Agency

CONICET

FONCyT

Publisher

Oxford University Press (OUP)

Subject

Insect Science,Ecology,General Medicine

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