Publications

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a rapid diagnostic technique of bactrocera cucurbitae and bactrocera zonata (diptera: tephritidae) for quarantine application. 201323152149
the complete nucleotide sequence of the mitochondrial genome of bactrocera minax (diptera: tephritidae).the complete 16,043 bp mitochondrial genome (mitogenome) of bactrocera minax (diptera: tephritidae) has been sequenced. the genome encodes 37 genes usually found in insect mitogenomes. the mitogenome information for b. minax was compared to the homologous sequences of bactrocera oleae, bactrocera tryoni, bactrocera philippinensis, bactrocera carambolae, bactrocera papayae, bactrocera dorsalis, bactrocera correcta, bactrocera cucurbitae and ceratitis capitata. the analysis indicated the structure ...201424964138
a comparison of polyphenolic content, antioxidant activity and insecticidal properties of jatropha species and wild ricinus communis l. found in mauritius.to evaluate the phytochemical, antimicrobial and insecticidal properties of different jatropha species and ricinus communis (castor) (r. communis) growing in mauritius.201425312155
antimicrobial, phytochemical and larvicidal properties of jatropha multifida linn.to evaluate the phytochemical, antimicrobial and insecticidal properties of different extracts of jatropha multifida (j. multifida) in mauritius.201425312154
effect of metarhizium anisopliae on the fertility and fecundity of two species of fruit flies and horizontal transmission of mycotic infection.in mauritius, the peach fruit fly, bactrocera zonata saunders (diptera: tephritidae), and the melon fly, bactrocera cucurbitae (coquillett), are the major pest of fruits and vegetables, respectively. fruit growers make use of broad-spectrum insecticides to protect their crops from fruit fly attack. this method of fruit fly control is hazardous to the environment and is a threat to beneficial insects. the entomopathogenic fungus, metarhizium anisopliae (metchnikoff) sorokin (hypocreales: clavicip ...201425201230
competitive interactions between immature stages of bactrocera cucurbitae (coquillett) and bactrocera tau (walker) (diptera: tephritidae) under laboratory conditions.the melon fly, bactrocera cucurbitae (coquillett), and the pumpkin fly, bactrocera tau (walker), are economically important pests that attack mainly cucurbitacean fruits. the two fruit fly species have similar natural distributions, host ranges, and population growth capacities. this study was designed to assess the asymmetrical competitions through resource exploitation between the larvae of b. cucurbitae and b. tau at different density levels and temperatures, and on different hosts by compari ...201427193811
a novel polysaccharide in insects activates the innate immune system in mouse macrophage raw264 cells.a novel water-soluble polysaccharide was identified in the pupae of the melon fly (bactrocera cucurbitae) as a molecule that activates the mammalian innate immune response. we attempted to purify this innate immune activator using nitric oxide (no) production in mouse raw264 macrophages as an indicator of immunostimulatory activity. a novel acidic polysaccharide was identified, which we named "dipterose", with a molecular weight of 1.01 × 10(6) and comprising nine monosaccharides. dipterose was ...201425490773
methoprene application and diet protein supplementation to male melon fly, bactrocera cucurbitae, modifies female remating behavior.methoprene (an analogue of juvenile hormone) application and feeding on a protein diet is known to enhance male melon fly, bactrocera cucurbitae coquillett (diptera: tephritidae), mating success. in this study, we investigated the effect of these treatments on male b. cucurbitae's ability to inhibit female remating. while 14-d-old females were fed on protein diet, 6-d-old males were exposed to one of the following treatments: (i) topical application of methoprene and fed on a protein diet; (ii) ...201424376160
parasitism, emergence, and development of spalangia endius (hymenoptera: pteromalidae) in pupae of different ages of bactrocera cucurbitae (diptera: tephritidae).the wasp spalangia endius walker (hymenoptera: pteromalidae) is a major parasitoid of the pupae of fruit flies, which are a common agricultural pest. an understanding of this intricate host-parasitoid interaction could provide basic information necessary for the sustainable integrated biological control of fruit flies. in this study, we investigated the effect of s. endius on different-aged pupae of the melon fly bactrocera cucurbitae coquillett by using choice and nonchoice tests under laborato ...201525700538
implementing a spinosad-based local bait station to control bactrocera cucurbitae (diptera: tephritidae) in high rainfall areas of reunion island.three species of fruit flies cause serious damage to cucurbit crops on reunion island: bactrocera cucurbitae (diptera: tephritidae) (coquillett 1899), dacus ciliatus (loew 1901), and dacus demmerezi (bezzi 1917). to control them, a program of agroecological management of cucurbit flies has been implemented based on the application of synéis-appât, especially spot sprays on corn borders. however, the high rainfall on reunion island limits the long-term efficiency of the bait; in addition, this me ...201525688089
a review of the current knowledge on zeugodacus cucurbitae (coquillett) (diptera, tephritidae) in africa, with a list of species included in zeugodacus.this paper reviews all available information regarding the occurrence and biology of the melon fly, zeugodacus cucurbitae (coquillett), in the afrotropical region, including data on invasion history, distribution patterns, population genetics, host range, and interspecific competition. although limited intraspecific variability has been observed within the region regarding the above mentioned aspects, there seems to be no indication that zeugodacus cucurbitae represents a species complex. a chec ...201526798277
disruption of darna pallivitta (lepidoptera: limacodidae) by conventional and mobile pheromone deployment.identification of the darna pallivitta (moore) pheromone component n-butyl (e)-7,9-decadienoate (e7,9-10:coon-bu) has made it possible to investigate communication disruption to control this lepidopteran pest. conventional communication disruption trials showed marked decreases in the mean number of male moths captured in e7,9-10:coonbu-treated fields compared with control fields. for traps baited with e7,9-10:coonbu, percent disruptions were 94.4% and 92.1% for septa (1 g pheromone/ha, 1-wk tri ...201526078301
assessment of sauromatum guttatum lectin toxicity against bactrocera cucurbitae.lectins are proteins that bind specifically to foreign glycans. due to this binding property, these molecules have potential application as bioinsecticidal tools replacing conventional chemical insecticides. the present study involved purification of phytolectin from the tubers of sauromatum guttatum by affinity chromatography on asialofetuin-linked silica matrix. the purity of the sample was checked by sds-page at ph 8.3. purified lectin was incorporated in the artificial diet of a dipteran mod ...201526688959
field evaluation of melolure, a formate analogue of cuelure, and reassessment of fruit fly species trapped in sydney, new south wales, australia.in australia, tephritids are usually attracted to either cuelure or methyl eugenol. methyl eugenol is a very effective lure, but cuelure is less effective likely due to low volatility. a new formate analogue of cuelure, melolure, has increased volatility, resulting in improved efficacy with the melon fruit fly, bactrocera cucurbitae coquillett. we tested the efficacy of melolure with fruit fly species in sydney as part of the national exotic fruit fly monitoring programme. this monitoring progra ...201526470243
weathering and chemical degradation of methyl eugenol and raspberry ketone solid dispensers for detection, monitoring, and male annihilation of bactrocera dorsalis and bactrocera cucurbitae (diptera: tephritidae) in hawaii.solid male lure dispensers containing methyl eugenol (me) and raspberry ketone (rk), or mixtures of the lures (me + rk), and dimethyl dichloro-vinyl phosphate (ddvp) were evaluated in area-wide pest management bucket or jackson traps in commercial papaya (carica papaya l.) orchards where both oriental fruit fly, bactrocera dorsalis (hendel), and melon fly, bactrocera cucurbitae (coquillett), are pests. captures of b. dorsalis with fresh wafers in jackson and bucket traps were significantly highe ...201526470301
melon fly, bactrocera cucurbitae (diptera: tephritidae), infestation in host fruits in the southwestern islands of japan before the initiation of island-wide population suppression, as recorded in publications of japanese public institutions.bactrocera cucurbitae (coquillett) is a tephritid fruit fly native to the indo-malayan region. its distribution, though, has extended to include africa, temperate asia, and a number of pacific islands. it became established in japan in 1919 in the yaeyama islands and spread north in the southwestern islands of japan. it was subsequently eradicated from these islands by an eradication program that extended from 1972 to 1993. as part of an effort to develop a worldwide database on the status of fr ...201526816487
resolving cryptic species complexes of major tephritid pests.an fao/iaea co-ordinated research project (crp) on "resolution of cryptic species complexes of tephritid pests to overcome constraints to sit application and international trade" was conducted from 2010 to 2015. as captured in the crp title, the objective was to undertake targeted research into the systematics and diagnostics of taxonomically challenging fruit fly groups of economic importance. the scientific output was the accurate alignment of biological species with taxonomic names; which led ...201526798252
reconstructing a comprehensive transcriptome assembly of a white-pupal translocated strain of the pest fruit fly bactrocera cucurbitae.bactrocera cucurbitae is a serious global agricultural pest. basic genomic information is lacking for this species, and this would be useful to inform methods of control, damage mitigation, and eradication efforts. here, we have sequenced, assembled, and annotated a comprehensive transcriptome for a mass-rearing sexing strain of this species. this forms a foundational genomic and transcriptomic resource that can be used to better understand the physiology and biochemistry of this insect as well ...201525830018
developmental biology of zeugodacus cucurbitae (diptera: tephritidae) in three cucurbitaceous hosts at different temperature regimes.fruit flies are key pests of cucurbits in many parts of the world, including tanzania. developmental biology of zeugodacus cucurbitae (coquillett) has been determined across temperature regimes in some cucurbitaceous hosts, in limited geographies. this study was conducted to determine duration and survival rates of immature stages of z. cucurbitae in three cucurbitaceous hosts, at different temperature regimes. it was hypothesized that temperature and cucurbitaceous hosts influence duration and ...201526589874
assessing the risk of invasion by tephritid fruit flies: intraspecific divergence matters.widely distributed species often show strong phylogeographic structure, with lineages potentially adapted to different biotic and abiotic conditions. the success of an invasion process may thus depend on the intraspecific identity of the introduced propagules. however, pest risk analyses are usually performed without accounting for intraspecific diversity. in this study, we developed bioclimatic models using maxent and boosted regression trees approaches, to predict the potential distribution in ...201526274582
assessment of navel oranges, clementine tangerines, and rutaceous fruits as hosts of bactrocera cucurbitae and bactrocera latifrons (diptera: tephritidae).export of citrus spp. fruits may require risk mitigation measures if grown in areas with established tephritid fruit fly (diptera: tephritidae) populations capable of infesting the fruits. the host status of citrus spp. fruits is unclear for two tephritid fruit fly species whose geographic ranges have expanded in recent years: melon fly, bactrocera cucurbitae (cocquillett), and bactrocera latifrons (hendel). in no choice cage infestation studies, b. latifrons oviposited into intact and punctured ...201526816484
novel toxicity of bacillus thuringiensis strains against the melon fruit fly, bactrocera cucurbitae (diptera: tephritidae).bactrocera cucurbitae (melon fruit fly) is one of the most detrimental vegetable-damaging pests in bangladesh. the toxicity of bacillus thuringiensis (bt) has been reported against a few genera of bactrocera in addition to numerous other insect species. bt strains, harbouring cry1a-type genes were, therefore, assayed in vivo against the 3(rd) instar larvae of b. cucurbitae in this study. the biotype-based prevalence of cry1 and cry1a genes was calculated to be 30.8% and 11.16%, respectively, of ...201526133509
host plant range of a fruit fly community (diptera: tephritidae): does fruit composition influence larval performance?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 ei ...201627650549
relative tolerance of six bactrocera (diptera: tephritidae) species to phytosanitary cold treatment.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 ...201627660425
diversity of bacterial communities in the midgut of bactrocera cucurbitae (diptera: tephritidae) populations and their potential use as attractants.the microbiota plays an important role in insect development and fitness. understanding the gut microbiota composition is essential for the development of pest management strategies. midgut bacteria were isolated from nine wild b. cucurbitae populations collected from different agroecological zones of india. these isolates were further studied for attractant potential of fruit fly adults, and the chemical constituents in the supernatants of gut bacteria were analysed.201626299539
characterization of irritans mariner-like elements in the olive fruit fly bactrocera oleae (diptera: tephritidae): evolutionary implications.genomic variation among species is commonly driven by transposable element (te) invasion; thus, the pattern of tes in a genome allows drawing an evolutionary history of the studied species. this paper reports in vitro and in silico detection and characterization of irritans mariner-like elements (mles) in the genome and transcriptome of bactrocera oleae (rossi) (diptera: tephritidae). eleven irritans mle sequences have been isolated in vitro using terminal inverted repeats (tirs) as primers, and ...201627392643
captures of wild ceratitis capitata, bactrocera dorsalis, and bactrocera cucurbitae (diptera: tephritidae) in traps with improved multilure tmr dispensers weathered in california.during 2012–2013, solid mallet tmr (trimedlure [tml], methyl eugenol [me], raspberry ketone [rk]) wafers impregnated with ddvp (2, 2-dichlorovinyl dimethyl phosphate) insecticide were weathered during summer (8 wk) and winter (12 wk) in five california citrus-growing counties (kern, ventura, orange, tulare, and riverside). in addition, tmr wafers without ddvp and with a hercon vaportape ii insecticidal strip were compared with tmr dispensers with ddvp at exeter and riverside. weathered treatment ...201626582906
population susceptibility to insecticides and the development of resistance in bactrocera cucurbitae (diptera: tephritidae).excessive insecticide applications are commonly used to manage bactrocera cucurbitae coquillett in china. resistance status, resistance development trends, and patterns of cross-resistance to insecticides in b. cucurbitae were investigated. among 21 populations from hainan island, two populations expressed high resistance to beta-cypermethrin; seven, eight, and ten populations expressed intermediate resistance to spinosad, avermectin, and beta-cypermethrin, respectively; four, six, one, five, an ...201626668351
identification and preliminary characterization of chemosensory perception-associated proteins in the melon fly bactrocera cucurbitae using rna-seq.an investigation into proteins involved in chemosensory perception in the melon fly, bactrocera cucurbitae (diptera: tephritidae) is described here using a newly generated transcriptome dataset. the melon fly is a major agricultural pest, widely distributed in the asia-pacific region and some parts of africa. for this study, a transcriptome dataset was generated using rna extracted from 4-day-old adult specimens of the melon fly. the dataset was assembled and annotated via gene ontology (go) ana ...201626752702
a chromosome-scale assembly of the bactrocera cucurbitae genome provides insight to the genetic basis of white pupae.genetic sexing strains (gss) used in sterile insect technique (sit) programs are textbook examples of how classical mendelian genetics can be directly implemented in the management of agricultural insect pests. although the foundation of traditionally developed gss are single locus, autosomal recessive traits, their genetic basis are largely unknown. with the advent of modern genomic techniques, the genetic basis of sexing traits in gss can now be further investigated. this study is the first of ...201728450369
insecticidal activity of the leaf essential oil of peperomia borbonensis miq. (piperaceae) and its major components against the melon fly bactrocera cucurbitae (diptera: tephritidae).the essential oil from the leaves of peperomia borbonensis from réunion island was obtained by hydrodistillation and characterized using gc-fid, gc/ms and nmr. the main components were myristicin (39.5%) and elemicin (26.6%). the essential oil (eo) of peperomia borbonensis and its major compounds (myristicin and elemicin), pure or in a mixture, were evaluated for their insecticidal activity against bactrocera cucurbitae (diptera: tephritidae) using a filter paper impregnated bioassay. the concen ...201728273402
combining cue-lure and methyl eugenol in traps significantly decreases catches of most bactrocera, zeugodacus and dacus species (diptera: tephritidae: dacinae) in australia and papua new guinea.male fruit fly attractants, cue-lure (cl) and methyl eugenol (me), are important in the monitoring and control of pest fruit fly species. species respond to cl or me but not both, and there are conflicting reports on whether combining cl (or its hydroxy analogue raspberry ketone) and me decreases their attractiveness to different species. fruit fly monitoring programs expend significant effort using separate cl and me traps and avoiding lure cross-contamination, and combining the two lures in on ...201729272411
using two-sex life tables to determine fitness parameters of four bactrocera species (diptera: tephritidae) reared on a semi-artificial diet.fruit flies in the genus bactrocera are global, economically important pests of agricultural food crops. however, basic life history information about these pests, which is vital for designing more effective control methods, is currently lacking. artificial diets can be used as a suitable replacement for natural host plants for rearing fruit flies under laboratory conditions, and this study reports on the two-sex life-table parameters of four bactrocera species (bactrocera correcta, bactrocera d ...201728944746
identification of the ubiquitous antioxidant tripeptide glutathione as a fruit fly semiochemical.many insects mark their oviposition sites with a host marking pheromone (hmp) to deter other females from overexploiting these sites. previous studies have identified and used hmps to manage certain fruit fly species; however, few are known for african indigenous fruit flies. the hmp of the african fruit fly, ceratitis cosyra, was identified as the ubiquitous plant and animal antioxidant tripeptide, glutathione (gsh). gsh was isolated from the aqueous extract of adult female fecal matter and cha ...201728911226
chemical degradation of tmr multilure dispensers for fruit fly detection weathered under california climatic conditions.degradation models for multilure fruit fly trap dispensers were analyzed to determine their potential for use in large california detection programs. solid three-component male lure tmr (trimedlure [tml], methyl eugenol [me], raspberry ketone [rk]) dispensers impregnated with ddvp (2, 2-dichlorovinyl dimethyl phosphate) insecticide placed inside jackson traps were weathered during summer (8 wk) and winter (12 wk) in five citrus-growing areas. additionally, tmr wafers without ddvp, but with an in ...201728854647
incongruence between molecules and morphology: a seven-gene phylogeny of dacini fruit flies paves the way for reclassification (diptera: tephritidae).molecular and morphological research often suggest conflicting results. selective pressure on certain morphologies can confound understanding of evolutionary relationships. dacini is one of the most diverse tribes of tephritid flies and contains many economically important pest species. their black and yellow patterned body markings are presumed to act as wasp mimicry, and the characters separating species and groups are limited and in some cases phenotypically plastic. the traditional taxonomy ...201729224785
isolation and molecular characterization of the transformer gene from bactrocera cucurbitae (diptera: tephritidae).transformer (tra) is a switch gene of sex determination in many insects, particularly in dipterans. however, the sex determination pathway in bactrocera cucurbitae (coquillett), a very destructive pest on earth, remains largely uncharacterized. in this study, we have isolated and characterized one female-specific and two male-specific transcripts of the tra gene (bcutra) of b. cucurbitae. the genomic structure of bcutra has been determined and the presence of multiple conserved transformer (tra) ...201728931159
vision-mediated exploitation of a novel host plant by a tephritid fruit fly.shortly after its introduction into the hawaiian islands around 1895, the polyphagous, invasive fruit fly bactrocera (zeugodacus) cucurbitae (coquillett) (diptera: tephritidae) was provided the opportunity to expand its host range to include a novel host, papaya (carica papaya). it has been documented that female b. cucurbitae rely strongly on vision to locate host fruit. given that the papaya fruit is visually conspicuous in the papaya agro-ecosystem, we hypothesized that female b. cucurbitae u ...201728380069
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