Search results for "Tephritidae"
showing 10 items of 28 documents
The complete mitochondrial genome of Bactrocera biguttula (Bezzi) (Diptera: Tephritidae) and phylogenetic relationships with other Dacini
2018
Bactrocera biguttula is an African olive fruit fly that does not attack cultivated olives but rather develops in the fruits of wild species of Olea and Noronhia. The complete mitochondrial genome of an individual specimen was characterized in comparison to other Bactrocera. The phylogenetic relationships of B. biguttula with other Dacini were investigated, with special focus on B. oleae, an agricultural pest known to attack cultivated and wild olives. The sequence had a total length of 15,829 bp, and included the typical features of insect mitogenomes, similarly to the other Bactrocera analysed. Start codons included ATG, ATC, ATT, and TCG (in COI). The majority of stop codons (TAA) were fu…
First record of Pachycrepoideus vindemmiae (Rondani) (Hymenoptera: Pteromalidae) parasitizing pupae of Ceratitis capitata (Wiedemann) (Diptera: Tephr…
2015
The Mediterranean fruit fly (Medfly), Ceratitis capitata (Wiedemann) (Diptera : Tephritidae), isone of the most devastating pests of fruits and vegetables worldwide (Liquido et al. 1991; Chueca et al. 2007). It is the most invasive species of all members of the Tephritidae (Zucchi 2001) and a key pest of citrus and other fruits in the Mediterranean countries, including Tunisia (Enkerlin & Mumford 1997; Jerraya 2003). Serious economic damage is caused by this insect in Tunisia; in mixed fruit cultivation crop losses can be from 80 to 100% (Jerraya 2003). Citrus is the most affected host crop, with direct annual losses attributed to C. capitata of up to 38% of annual income from Tunisian citr…
Gel-electrophoretic description of European populations ofTerellia virens (Loew) (Diptera, Tephritidae); implications for its use as an agent for the…
1991
Allozyme frequencies of 15 enzyme loci, 14 of which were polymorphic, were used to characterize sevenTerellia virens populations originating from three allopatrically distributedCentaurea species. The two populations whose origins were geographically furthest apart, from Israel (onC. iberica) and from Switzerland (onC. vallesiaca), showed relatively high values of genetic distance from the 5 populations sampled in Austria and Hungary (onC. maculosa) (Nei's D>0.07). The latter five displayed a high degree of genetic similarity. No diagnostic (fixed) allelic differences were observed between these three groups ofT. virens populations, but they could be well characterized by significant differ…
Morphological adaptation in host races of Tephritis conura
2007
The present study investigates morphological differentiation among host races of the fruit fly Te phritis conura Loew (Diptera: Tephritidae) for two fitness-related traits and whether these traits are host induced or genetically determined. Flies were analyzed from independent sympatric regions, and from one syntopic site where parental host plants [ Cirsium heterophyllum (L.) Hill. and Cirsium oleraceum (L.) Scop. (Cardueae)] and hybrid plants ( C. heterophyllum × C. oleraceum ) co-occur. As both host races may oviposit on hybrid plants and hybrid plants provide an identical environment for larvae of both host races, flies emerging from C. heterophyllum × C. oleraceum hybrids were used to …
Genetic and morphological differentiation in Tephritis bardanae (Diptera: Tephritidae): evidence for host-race formation
2003
The fruit fly Tephritis bardanae infests flower heads of two burdock hosts, Arctium tomentosum and A. minus. Observations suggest host-associated mating and behavioural differences at oviposition indicating host-race status. Previously, flies from each host plant were found to differ slightly in allozyme allele frequencies, but these differences could as well be explained by geographical separation of host plants. In the present study, we explicitly test whether genetic and morphological variance among T. bardanae are explained best by host-plant association or by geographical location, and if this pattern is stable over a 10-year period. Populations of A. tomentosum flies differed signific…
Invasion genetics of American cherry fruit fly in Europe and signals of hybridization with the European cherry fruit fly
2013
The American cherry fruit fly is an invasive pest species in Europe, of serious concern in tart cherry productionaswellasforthepotentialtohybridizewiththeEuropeancherryfruitfly,Rhagoletiscerasi L. (Diptera: Tephritidae), which might induce new pest dynamics. In the first European reports, the question arose whether only the eastern American cherry fruit fly, Rhagoletis cingulata (Loew) (Diptera: Tephritidae), is present, or also the closely related western American cherry fruit fly, Rhagoletis indifferens Curran. In this study, we investigate the species status of European populations by comparing these with populations of both American species from their native ranges, the invasion dynamic…
EFFECTS OF NATURAL COMPOUNDS FROM Citrus limon (L.) Burm. f. ON THE BEHAVIOR OF Ceratitis capitata (Wiedemann) (Diptera: Tephritidae) AND Grapholita …
2012
Effetti di composti naturali da Citrus limon (L.) Burm. f. sul comportamento di Ceratitis capitata (Wiedemann) e Grapholita molesta (Busck). La ricerca ha riguardato gli effetti che le sostanze naturali provenienti da Citrus limon (L.) Burm. f. hanno sul comportamento di due importanti fitofagi dei fruttiferi, Ceratitis capitata (Wiedemann) (Diptera: Tephritidae) e Grapholita molesta (Busck) (Lepidoptera: Tortricidae). Inizialmente si è proceduto all’estrazione di differenti sostanze dal flavedo di quattro cultivar di limone coltivate in Sicilia; in particolare sono stati estratti gli oli essenziali e grazie a tre solventi organici (etere di petrolio, diclorometano e metanolo) sono stati ot…
Parassitizzazione di Bactrocera oleae su olivo coltivato e selvatico in Sicilia e nel Western Cape (Sud Africa)
2011
Nel 2009 e nel 2010 in Sicilia e nella regione del Western Cape (Sud Africa) sono stati condotti studi sulla parassitizzazione della mosca delle olive, Bactrocera oleae, raccogliendo i frutti su piante di olivo coltivato (Olea europaea ssp. europaea) e selvatico (O. europaea ssp. oleaster in Sicilia, O. europaea ssp. cuspidata in Sud Africa); le piante delle due sottospecie erano non trattate e distanti pochi metri. I campioni sono stati raccolti nell’arco di quattro mesi in Sicilia e di due mesi in Sud Africa. Per i campioni di olive sono stati registrati gli attacchi di B. oleae (punture di ovideposizione e fori d’uscita) e il diametro equatoriale. Le olive attaccate da B. oleae in Sicili…
First records of pollinators of two co-occurring Mediterranean Apocynaceae
2011
This article presents results of a field survey of pollinators of two Apocynaceae, Periploca laevigata subsp. angustifolia (Labill.)Markgraf (Periplocoideae) and Caralluma europaea (Guss.) N.E.Br. Asclepiadoideae) co-occurring on Lampedusa Island, Mediterranean sea. Fifteen species within nine families of Diptera have been identified as pollinators of the two plants. The families involved are Tephritidae, Milichiidae, Trixoscelididae, cathophagidae, Anthomyiidae, Muscidae, Calliphoridae, Sarcophagidae, Rhinophoridae. Families of Muscidae and Sarcophagidae are the more represented, respectively with four and three species. P. laevigata subsp. angustifolia seems to have a broader spectrum of …
Wing morphometrics as a possible tool for the diagnosis of the Ceratitis fasciventris, C. anonae, C. rosa complex (Diptera, Tephritidae)
2015
Abstract Previous attempts to resolve the Ceratitis FAR complex (Ceratitis fasciventris, Ceratitis anonae, Ceratitis rosa, Diptera, Tephritidae) showed contrasting results and revealed the occurrence of five microsatellite genotypic clusters (A, F1, F2, R1, R2). In this paper we explore the potential of wing morphometrics for the diagnosis of FAR morphospecies and genotypic clusters. We considered a set of 227 specimens previously morphologically identified and genotyped at 16 microsatellite loci. Seventeen wing landmarks and 6 wing band areas were used for morphometric analyses. Permutational multivariate analysis of variance detected significant differences both across morphospecies and g…