The study aimed to evaluate the host preference and success of parasitoids from different host or... more 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 Braco-nidae) (DA), native to the Neotropical region, were evaluated. Experiments were performed under laboratory conditions, in dual-choice 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 pu-pae, 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. areo-latus was higher in parasitoids that originated in A. fraterculus, in the same host species. For A. pelleranoi with origin in A. frater-culus, 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 (DA-CC) 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.
This work aimed to check if Phyllocnistis citrella attacks spontaneous growth plants present in a... more This work aimed to check if Phyllocnistis citrella attacks spontaneous growth plants present in an organic citrus orchard, to identify in these plants other leafmining Lepidoptera and its parasitoids, and to verify if the parasitoids species are the same ones reported for P. citrella. The work was conducted in Montenegro, RS, in an organic orchard of the hybrid 'Murcott' (Citrus
... 2002). Nonetheless, the ac-tion of native parasitoids on the leafminer has been veri fied in ... more ... 2002). Nonetheless, the ac-tion of native parasitoids on the leafminer has been veri fied in diverse citrus growing regions (LaSalle and Peña 1997; Penteado-Dias et al. ... Revista Laranja 18 (1): 79-84. PERALES-GUTIéRREZ, MA; ARREDONDO-B., HC; GAR-ZA-G., E. 1996. ...
The structure and composition of the assemblage of pupal parasitoids of Phyllocnistis citrella St... more The structure and composition of the assemblage of pupal parasitoids of Phyllocnistis citrella Stainton, the citrus leafminer, were studied in two citrus orchards (Citrus deliciosa Tenore cv. Montenegrina and Citrus sinensis (L.) Osbeck x Citrus reticulata Blanco hybrid Murcott), in Montenegro County (29 degrees 68'S and 51 degrees 46'W), southern Brazil. At fortnightly samplings, from July 2001 to June 2003, all the new shoots from 24 randomly selected trees were inspected. The species richness reached five native species in the Murcott orchard, and six in Montenegrina. In Murcott, the presence of Ageniaspis citricola (Hymenoptera: Encyrtidae), an exotic species, was detected in the first year of sampling, probably migrating from the nearby areas where it had been released for the miner control. In Montenegrina, its presence was only registered in the second year. A. citricola in both areas was dominant and changed the community structure of parasitoid complex of P. citrella in both orchards.
The study aimed to evaluate the host preference and success of parasitoids from different host or... more 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 Braco-nidae) (DA), native to the Neotropical region, were evaluated. Experiments were performed under laboratory conditions, in dual-choice 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 pu-pae, 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. areo-latus was higher in parasitoids that originated in A. fraterculus, in the same host species. For A. pelleranoi with origin in A. frater-culus, 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 (DA-CC) 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.
This work aimed to check if Phyllocnistis citrella attacks spontaneous growth plants present in a... more This work aimed to check if Phyllocnistis citrella attacks spontaneous growth plants present in an organic citrus orchard, to identify in these plants other leafmining Lepidoptera and its parasitoids, and to verify if the parasitoids species are the same ones reported for P. citrella. The work was conducted in Montenegro, RS, in an organic orchard of the hybrid 'Murcott' (Citrus
... 2002). Nonetheless, the ac-tion of native parasitoids on the leafminer has been veri fied in ... more ... 2002). Nonetheless, the ac-tion of native parasitoids on the leafminer has been veri fied in diverse citrus growing regions (LaSalle and Peña 1997; Penteado-Dias et al. ... Revista Laranja 18 (1): 79-84. PERALES-GUTIéRREZ, MA; ARREDONDO-B., HC; GAR-ZA-G., E. 1996. ...
The structure and composition of the assemblage of pupal parasitoids of Phyllocnistis citrella St... more The structure and composition of the assemblage of pupal parasitoids of Phyllocnistis citrella Stainton, the citrus leafminer, were studied in two citrus orchards (Citrus deliciosa Tenore cv. Montenegrina and Citrus sinensis (L.) Osbeck x Citrus reticulata Blanco hybrid Murcott), in Montenegro County (29 degrees 68'S and 51 degrees 46'W), southern Brazil. At fortnightly samplings, from July 2001 to June 2003, all the new shoots from 24 randomly selected trees were inspected. The species richness reached five native species in the Murcott orchard, and six in Montenegrina. In Murcott, the presence of Ageniaspis citricola (Hymenoptera: Encyrtidae), an exotic species, was detected in the first year of sampling, probably migrating from the nearby areas where it had been released for the miner control. In Montenegrina, its presence was only registered in the second year. A. citricola in both areas was dominant and changed the community structure of parasitoid complex of P. citrella in both orchards.
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