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Leandro F Prezotto, André L P Perondini, Vicente Hernández-Ortiz, Celso L Marino, Denise Selivon
Infection by Wolbachia was described previously in eleven species of Anastrepha fruit flies some of which are important pests of fruticulture. One such species is the nominal Anastrepha fraterculus, the South American fruit fly, which actually comprises a complex of cryptic species. The suggestions of using Wolbachia for the control of these pest species, make imperative a more precise characterization of the existing strains of the bacteria. In this study, population samples of the A. fraterculus complex from Brazil, Argentina, Peru, Ecuador, Colombia, Guatemala and Mexico were analyzed for Wolbachia infection...
November 24, 2016: Systematic and Applied Microbiology
Z Shi, H Liang, Y Hou
Although some novel antimicrobial peptides (AMP) have been successfully isolated from Bactrocera dorsalis Hendel, the mechanisms underlying the induction of these peptides are still elusive. The homolog of NF-κB transcription factor Relish, designated as BdRelish, was cloned from B. dorsalis. The full length cDNA of BdRelish is 3954 bp with an open reading frame that encodes 1013 amino acids. Similar to Drosophila Relish and the mammalian p100, it is a compound protein containing a conserved Rel homology domain, an IPT (Ig-like, plexins, transcription factors) domain and an IκB-like domain (four ankyrin repeats), the nuclear localization signal RKRRR is also detected at the residues 449-453, suggesting that it has homology to Relish and it is a member of the Rel family of transcription activator proteins...
November 22, 2016: Bulletin of Entomological Research
Jiang-Ning Wang, Xiao-Lin Chen, Xin-Wen Hou, Li-Bing Zhou, Chao-Dong Zhu, Li-Qiang Ji
BACKGROUND: Many species of Tephritidae are damaging to fruit that might negatively impact international fruit trade. Automatic or semi-automatic identification of fruit flies are highly needed for diagnosing causes of damage and quarantine protocols for economically relevant insects. RESULTS: A fruit fly image identification system named AFIS1.0 has been developed using 74 species belonging to 6 genera, which include majority pests in Tephritidae. The system combines automated image identification and manual verification, balancing operability and accuracy...
November 17, 2016: Pest Management Science
Julia V A Figueiredo, André L P Perondini, Denise Selivon
The chorion internal structure of the Anastrepha eggs from 16 species of different infrageneric taxonomic groups is described by scanning and transmission electron microscopy analyses. The chorion has structural similarities of layers, and is cavernous along the entire length of the eggs. Despite these similarities, an additional trabecular layer (ATL) exists in some species that, together with other characteristics, allow the recognition of four patterns of chorion structuring. Pattern I, in which the ATL layer is absent, was found in A...
November 12, 2016: Arthropod Structure & Development
Welma Pieterse, John S Terblanche, Pia Addison
Bactrocera dorsalis (Hendel) (Diptera: Tephritidae) has shown remarkable range expansion over the past 10years and invaded several new continents including Africa. Here we report results of a detailed assessment of acute high and low temperature survival ability and the plasticity thereof, to test the hypothesis that traits of the thermal niche have contributed to the species' invasion ability. We also assess life-stage-related variation of thermal tolerances to determine potential stage-related environmental sensitivity...
November 12, 2016: Journal of Insect Physiology
Fan Jiang, Xubin Pan, Xuankun Li, Yanxue Yu, Junhua Zhang, Hongshan Jiang, Liduo Dou, Shuifang Zhu
The genus Dacus is one of the most economically important tephritid fruit flies. The first complete mitochondrial genome (mitogenome) of Dacus species - D. longicornis was sequenced by next-generation sequencing in order to develop the mitogenome data for this genus. The circular 16,253 bp mitogenome is the typical set and arrangement of 37 genes present in the ancestral insect. The mitogenome data of D. longicornis was compared to all the published homologous sequences of other tephritid species. We discovered the subgenera Bactrocera, Daculus and Tetradacus differed from the subgenus Zeugodacus, the genera Dacus, Ceratitis and Procecidochares in the possession of TA instead of TAA stop codon for COI gene...
November 4, 2016: Scientific Reports
Paolo Gabrieli, Francesca Scolari
The Mediterranean fruit fly (medfly) Ceratitis capitata (Wiedemann) (Diptera: Tephritidae) is a pest species with extremely high agricultural relevance. This is due to its reproductive behavior: females damage the external surface of fruits and vegetables when they lay eggs and the hatched larvae feed on their pulp. Wild C. capitata populations are traditionally controlled through insecticide spraying and/or eco-friendly approaches, the most successful being the Sterile Insect Technique (SIT). The SIT relies on mass-rearing, radiation-based sterilization and field release of males that retain their capacity to mate but are not able to generate fertile progeny...
October 1, 2016: Journal of Visualized Experiments: JoVE
Zhongzhen Wu, Jintian Lin, He Zhang, Xinnian Zeng
The oriental fruit fly, Bactrocera dorsalis (Diptera: Tephritidae), is one of the most destructive pests throughout tropical and subtropical regions in Asia. This insect displays remarkable changes during different developmental phases in olfactory behavior between sexually immature and mated adults. The olfactory behavioral changes provide clues to examine physiological and molecular bases of olfactory perception in this insect. We comparatively analyzed behavioral and neuronal responses of B. dorsalis adults to attractant semiochemicals, and the expression profiles of antenna chemosensory genes...
2016: Frontiers in Physiology
Hannes Schuler, Peter Kern, Wolfgang Arthofer, Heidrun Vogt, Maximilian Fischer, Christian Stauffer, Markus Riegler
The eastern cherry fruit fly, Rhagoletis cingulata Loew (Diptera: Tephritidae), is an economically important pest of cherries in North America. In 1983 it was first reported in Europe where it shares its ecological niche with the native European cherry fruit fly, Rhagoletis cerasi L. (Diptera: Tephritidae). Their coexistence in Europe led to the recent horizontal transmission of the Wolbachia strain wCer1 from R. cerasi to R. cingulata Horizontal Wolbachia transmission is mediated by either sharing of ecological niches or by interacting species such as parasitoids...
October 15, 2016: Environmental Entomology
M Constanza Mannino, Máximo Rivarola, Alejandra C Scannapieco, Sergio González, Marisa Farber, Jorge L Cladera, Silvia B Lanzavecchia
BACKGROUND: Diachasmimorpha longicaudata (Hymenoptera: Braconidae) is a solitary parasitoid of Tephritidae (Diptera) fruit flies of economic importance currently being mass-reared in bio-factories and successfully used worldwide. A peculiar biological aspect of Hymenoptera is its haplo-diploid life cycle, where females (diploid) develop from fertilized eggs and males (haploid) from unfertilized eggs. Diploid males were described in many species and recently evidenced in D. longicaudata by mean of inbreeding studies...
October 12, 2016: BMC Genomics
Paolo Gabrieli, Francesca Scolari, Alessandro Di Cosimo, Grazia Savini, Marco Fumagalli, Ludvik M Gomulski, Anna R Malacrida, Giuliano Gasperi
In the Mediterranean fruit fly, Ceratitis capitata (Wiedemann)(Diptera: Tephritidae), mating has a strong impact on female biology, leading to a decrease in sexual receptivity and increased oviposition and fecundity. Previous studies suggest that sperm transfer may play a role in inducing these behavioural changes. Here we report the identification of a medfly innexin gene, Cc-inx5, whose expression is limited to the germ-line of both sexes. Through RNA interference of this gene, we generated males without testes and, consequently, sperm, but apparently retaining all the other reproductive organs intact...
October 6, 2016: Insect Biochemistry and Molecular Biology
William K Heve, Fahiem E El-Borai, Daniel Carrillo, Larry W Duncan
BACKGROUND: Caribbean fruit fly (Caribfly) is a serious economic insect pest because of development of larvae that hatch from eggs oviposited into fruits by female adults. This study assessed virulence of at least 10 entomopathogenic nematodes (EPNs) to Caribfly in laboratory bioassays as a starting point toward evaluation of management strategies for the fruit-to-soil-dwelling stages of A. suspensa in fields infested by Caribfly. RESULTS: Inoculation of A. suspensa with 1 ml of ca...
September 22, 2016: Pest Management Science
Francisco Díaz-Fleischer, Diana Pérez-Staples, Javier Valle-Mora, José Antonio García-Pérez
Toxic environmental effects of most insecticides have led to a search for bio-organic insecticides. In this study, we tested the effects of lethal and sublethal exposure to two abamectin-based insecticides (VOLIAM TARGO and LUQ-THOR) on survival, mating, and oviposition of the tephritid Anastrepha ludens (Loew). Different doses of insecticides (0.001-2.00% of the commercial products) were offered mixed with the phagostimulant bait Captor commonly used in spraying and in trapping activities for the control of flies...
October 5, 2016: Journal of Economic Entomology
Keiko Uramoto, Allen L Norrbom, Roberto A Zucchi
The previously poorly known species Anastrepha luederwaldti Lima, 1934 is redescribed based on a reexamination of the syntypes from São Paulo and additional specimens from Santa Catarina and Rio Grande do Sul, Brazil. A lectotype is designated.
September 15, 2016: Zootaxa
Neal L Evenhuis, Thomas Pape, Adrian C Pont
The Diptera genus-group names of Pierre-Justin-Marie Macquart are reviewed and annotated. A total of 399 available genus-group names in 69 families of Diptera are listed alphabetically, for each name giving author, year and page of original publication, originally included species, type species and method of fixation, current status of the name, family placement, and a list of any emendations of it that have been found in the literature. Remarks are given to clarify nomenclatural or taxonomic information. In addition, an index to all the species-group names of Diptera proposed by Macquart (3,611, of which 3,543 are available) is given with bibliographic reference (year and page) to each original citation...
September 30, 2016: Zootaxa
Jaipal S Choudhary, Naiyar Naaz, Chandra S Prabhakar, Moanaro Lemtur
The study examined the genetic diversity and demographic history of Bactrocera dorsalis, a destructive and polyphagous insect pest of fruit crops in diverse geographic regions of India. 19 widely dispersed populations of the fly from India and other Asian countries were analysed using partial sequences of mitochondrial cytochrome oxidase I (cox1) and NADH dehydrogenase 1 (nad1) genes to investigate genetic diversity, genetic structure, and demographic history in the region. Genetic diversity indices [number of haplotypes (H), haloptype diversity (Hd), nucleotide diversity (π) and average number of nucleotide difference (k)] of populations revealed that B...
October 2016: Genetica
Kevin Yu-Bing Huang, Remzi Atlihan, Ayhan Gökçe, Joyce Yu-Bing Huang, Hsin Chi
The life table data for the oriental fruit fly, Bactrocera dorsalis (Hendel), at different adult sex ratios (1♀: 1♂, 1♀: 50♂, 50♀: 1♂ free-choice mating, and 50♀: 1♂ no-choice mating) were collected to determine the effects of sex-ratio manipulation on current pest control procedures. At 1♀: 1♂, females mated, on average, 2.3 times during their lifetime with a mean fecundity (F) of 1,122 eggs. The net reproductive rate (R0), intrinsic rate of increase (r), finite rate (λ), and mean generation time (T) were 561...
September 30, 2016: Journal of Economic Entomology
Chonticha Kunprom, Pairot Pramual
The objectives of this study were to examine the genetic variation in fruit flies (Diptera: Tephritidae) in Thailand and to test the efficiency of the mitochondrial cytochrome c oxidase subunit I (COI) barcoding region for species-level identification. Twelve fruit fly species were collected from 24 host plant species of 13 families. The number of host plant species for each fruit fly species ranged between 1 and 11, with Bactrocera correcta found in the most diverse host plants. A total of 123 COI sequences were obtained from these fruit fly species...
October 2016: Genome Génome / Conseil National de Recherches Canada
Scott W Myers, Elena Cancio-Martinez, Guy J Hallman, Emily A Fontenot, Marc J B Vreysen
To compare relative cold treatment tolerance across the economically important tephritid fruit flies (Diptera: Tephritidae), Bactrocera carambolae Drew & Hancock, Bactrocera correcta (Bezzi), Bactrocera cucurbitae (Coquillett), four populations of Bactrocera dorsalis (Hendel), Bactrocera zonata (Saunders), and Bactrocera tryoni (Froggatt), eggs (in vitro), and larvae (in infested fruit or on carrot diet) were cold treated at 2.0 ± 0.2 °C for selected durations. The study was performed to assess whether a single (i...
September 21, 2016: Journal of Economic Entomology
Abir Hafsi, Benoit Facon, Virginie Ravigné, Frédéric Chiroleu, Serge Quilici, Brahim Chermiti, Pierre-François Duyck
BACKGROUND: Phytophagous insects differ in their degree of specialisation on host plants, and range from strictly monophagous species that can develop on only one host plant to extremely polyphagous species that can develop on hundreds of plant species in many families. Nutritional compounds in host fruits affect several larval traits that may be related to adult fitness. In this study, we determined the relationship between fruit nutrient composition and the degree of host specialisation of seven of the eight tephritid species present in La Réunion; these species are known to have very different host ranges in natura...
2016: BMC Ecology
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