Determining the Functional Response and Mutual Interference of Utetes anastrephae (Hymenoptera: Braconidae) on Anastrepha obliqua (Diptera: Tephritidae) Larvae for Mass Rearing Purposes

作者：Poncio Sonia; Montoya Pablo; Cancino Jorge; Nava Dori Edson

来源：Annals of the Entomological Society of America, 2016, 109(4): 518-525.

DOI：10.1093/aesa/saw031

• mass rearing
• Braconidae
• augmentative biological control
• fruit fly
• superparasitism

Although functional response and mutual interference studies may be of great importance to augmentative biological control projects focussed on pests of economic importance, such studies have traditionally been overlooked in mass rearing projects of natural enemies. In this study, we aimed to explore both interactions in Utetes anastrephae (Viereck), a native parasitoid commonly associated with Anastrepha obliqua (Macquart), a major fruit fly pest of Spondias spp. and Mangifera indica L. in the Americas, for mass rearing purposes. The functional response of U. anastrephae on A. obliqua larvae fit a type II model according to Holling's disc equation, with an instantaneous rate of discovery (a') of 0.470 and a handling time (Th) of 0.099. The effects of mutual interference were more severe at high parasitoid densities due to the higher frequency of interactions. An increasing number of foraging females resulted in an increasing number of oviposition scars and immature parasitoids per pupa without significant differences in the total number of attacked larvae. Superparasitism at high densities of foraging females had a negative effect on adult emergence, was associated with a female-biased sex ratio, and had no effect on survival or flight ability parameters. Strategies for optimizing the mass rearing of this parasitoid species are outlined.

• 出版日期2016-7