Bulletin of Insectology (2019) 72, 13-20
Roberta Agostini Rohr, Simone Mundstock Jahnke and Luiza Rodrigues Redaelli (2019)
Influence of the original host in the preference of Aganaspis pelleranoi and Doryctobracon areolatus, parasitoids of Tephritidae larvae
Bulletin of Insectology 72 (1), 13-20
Abstract: The study aimed to evaluate the host preference and success of parasitoids from different host origins. The Tephritidae parasitoids Aganaspis pelleranoi (Brethes) (Hymenoptera Figitidae) (AP) and Doryctobracon areolatus (Szepligeti) (Hymenoptera Braconidae) (DA), native to the Neotropical region, were evaluated. Experiments were performed under laboratory conditions, in dualchoice tests, in which two oviposition units, each containing 25 larvae of either native host Anastrepha fraterculus (Wiedemann) (Diptera Tephritidae) (AF) or exotic host Ceratitis capitata (Wiedemann) (Diptera Tephritidae) (CC), were offered simultaneously to parasitoids that had emerged from pupae of both species. The average number of pupae, emerged parasitoids, parasitized pupae, and sex ratio of the offspring were evaluated. The average number of parasitoids emerged for A. pelleranoi that originated from A. fraterculus (AP-AF) was significantly higher in the host A. fraterculus compared with C. capitata. The same occurred for parasitoids originated from C. capitata (AP-CC), parasitizing larvae of the host specie C. capitata. The emergence rate of D. areolatus was higher in parasitoids that originated in A. fraterculus, in the same host species. For A. pelleranoi with origin in A. fraterculus, a higher average of parasitized pupae was observed for the host of the same species. D. areolatus regardless of the original host, parasitized a larger number of A. fraterculus pupae. A. pelleranoi had a male-biased sex ratio, ranging from 0.11 to 0.42 depending on the origin and the host. The sex ratio for D. areolatus was 50%, only in parasitoids originated from C. capitata (DACC) and having host larvae from the same species. The results for A. pelleranoi (AP-AF and AP-CC) and D. areolatus (DA-AF) indicate that original host origin of female might alter host preference. In addition, C. capitata was a less suitable host for rearing these species of parasitoids.
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Database assignments for author(s): Luiza R. Redaelli
Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution
