PROIMI   05436
PLANTA PILOTO DE PROCESOS INDUSTRIALES MICROBIOLOGICOS
Unidad Ejecutora - UE
artículos
Título:
Mortality by Parasitization in the Association between Diachasmimorpha tryoni (Hymenoptera: Braconidae) and Ceratitis capitata (Diptera: Tephritidae) under Field-Cage Conditions
Autor/es:
ALBORNOZ-MEDINA P.; VAN NIEUWENHOVE G. A.; BEZDJIAN, L. P.; SCHLISERMAN, P.; FIDELIS MARINHO, C.; OVRUSKI S.M.
Revista:
Natural Science
Editorial:
Scientific Research Publishing Inc.
Referencias:
Año: 2014 vol. 6 p. 1267 - 1274
ISSN:
2150-4091
Resumen:
Ceratitis capitata (Wiedemann) is one of the major pests currently affecting world fruit production.
In Argentina?s northern Citrus-producing regions, C. capitata is actively multiplying in large exotic
host fruits, such as Citrus paradisi Macfadyen (grapefruit), Citrus aurantium L. (sour orange) and
Citrus sinensis L. (Osbeck) (sweet orange). Faced with this situation, the use of parasitoids as biocontrol
agents is currently receiving renewed attention as a new biological tool for controlling
pestiferous fruit flies within the Argentinean National Fruit Fly Control and Eradication Program
(ProCEM). Consequently, a viable approach to controlling C. capitata involves the use of exotic parasitoids
such as Diachasmimorpha tryoni (Cameron). In this study, the effectiveness of D. tryoni
females to find and successfully parasitize C. capitata larvae infesting all Citrus species mentioned
earlier was assessed. Parasitoids were allowed to forage for 8 h on grapefruits and oranges artificially
infested with laboratory-reared C. capitata larvae under natural environmental conditions
(field cage). Parasitoid emergence, parasitism, overall effectiveness, and sex ratio of parasitoid
offspring were estimated as response variables. The higher effectiveness of D. tryoni females recorded
from C. sinensis would be mainly a result of both increased host density per unit of fruit
surface area and fruit physical features. The study provides evidence that D. tryoni contributed to C. capitata mortality in all Citrus species assessed. However, the mortality values recorded from C.
sinensis, C. aurantium, and C. paradisi did not exceed 10%, 1.5%, and 1.7%, respectively. Nonetheless,
D. tryoni might be selected to forage under both high and low host density conditions.