Academic literature on the topic 'Bactrocera tryoni'
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Journal articles on the topic "Bactrocera tryoni"
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Cruickshank, Leanne, Andrew J. Jessup, and David J. Cruickshank. "Interspecific crosses of Bactrocera tryoni (Froggatt) and Bactrocera jarvisi (Tryon) (Diptera: Tephritidae) in the laboratory." Australian Journal of Entomology 40, no. 3 (July 13, 2001): 278–80. http://dx.doi.org/10.1046/j.1440-6055.2001.00223.x.
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Pike, N., W. Y. S. Wang, and A. Meats. "The likely fate of hybrids of Bactrocera tryoni and Bactrocera neohumeralis." Heredity 90, no. 5 (April 25, 2003): 365–70. http://dx.doi.org/10.1038/sj.hdy.6800253.
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Wang, Y., H. Yu, K. Raphael, and A. S. Gilchrist. "Genetic delineation of sibling species of the pest fruit fly Bactocera (Diptera: Tephritidae) using microsatellites." Bulletin of Entomological Research 93, no. 4 (July 2003): 351–60. http://dx.doi.org/10.1079/ber2003249.
Full textAbstract:
AbstractUsing a large set of microsatellites, the genetic relationships between three closely related Australian fruit fly species, Bactrocera tryoni (Froggatt), B. neohumeralis (Hardy) and B. aquilonis(May) were investigated. Bactrocera tryoni and B. neohumeralis are sympatric, while B. aquilonis is allopatric to both. The sympatric species, B. tryoni and B. neohumeralis, were found to be genetically distinct. It is likely that despite differences in mating time between these two species, some gene flow still occurs. In contrast, the sibling species B. tryoni and B. aquilonis were found to be closely related, despite allopatry. The level of genetic divergence was similar to that found within eastern Australian populations of B. tryoni. Consideration of all available genetic data suggests that this similarity is not due to recent (i.e. within the last 30 years) displacement of B. aquilonis by B. tryoni from the B. aquilonis region (north-western Australia). Instead the data suggests that, at least in the areas sampled, asymmetrical hybridization may have occurred over a longer timescale.
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Zhao, J. T., M. Frommer, J. A. Sved, and A. Zacharopoulou. "Mitotic and polytene chromosome analyses in the Queensland fruit fly, Bactrocera tryoni (Diptera: Tephritidae)." Genome 41, no. 4 (August 1, 1998): 510–26. http://dx.doi.org/10.1139/g98-053.
Full textAbstract:
The Queensland fruit fly, Bactrocera tryoni, like the Mediterranean fruit fly, Ceratitis capitata, has a diploid complement of 12 chromosomes, including five pairs of autosomes and a XX/XY sex chromosome pair. Characteristic features of each chromosome are described. Chromosomal homology between B. tryoni and C. capitata has been determined by comparing chromosome banding pattern and in situ hybridisation of cloned genes to polytene chromosomes. Although the evidence indicates that a number of chromosomal inversions have occurred since the separation of the two species, synteny of the chromosomes appears to have been maintained.Key words: tephritid fruit fly, Bactrocera tryoni, polytene chromosomes, in situ hybridisation, chromosomal homology.
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Mas, Flore, Lee-Anne Manning, Maryam Alavi, Terry Osborne, Olivia Reynolds, and Andrew Kralicek. "Early detection of fruit infested with Bactrocera tryoni." Postharvest Biology and Technology 175 (May 2021): 111496. http://dx.doi.org/10.1016/j.postharvbio.2021.111496.
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Clarke, Anthony R., Katharina Merkel, Andrew D. Hulthen, and Florian Schwarzmueller. "Bactrocera tryoni (Froggatt) (Diptera: Tephritidae) overwintering: an overview." Austral Entomology 58, no. 1 (September 7, 2018): 3–8. http://dx.doi.org/10.1111/aen.12369.
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Booth, Yvonne K., William Kitching, and James J. De Voss. "Biosynthesis of the Spiroacetal Suite in Bactrocera tryoni." ChemBioChem 12, no. 1 (December 9, 2010): 155–72. http://dx.doi.org/10.1002/cbic.201000481.
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Valerio, Federica, Nicola Zadra, Omar Rota-Stabelli, and Lino Ometto. "The Impact of Fast Radiation on the Phylogeny of Bactrocera Fruit Flies as Revealed by Multiple Evolutionary Models and Mutation Rate-Calibrated Clock." Insects 13, no. 7 (June 30, 2022): 603. http://dx.doi.org/10.3390/insects13070603.
Full textAbstract:
Several true fruit flies (Tephritidae) cause major damage to agriculture worldwide. Among them, species of the genus Bactrocera are extensively studied to understand the traits associated with their invasiveness and ecology. Comparative approaches based on a reliable phylogenetic framework are particularly effective, but several nodes of the Bactrocera phylogeny are still controversial, especially concerning the reciprocal affinities of the two major pests B. dorsalis and B. tryoni. Here, we analyzed a newly assembled genomic-scaled dataset using different models of evolution to infer a phylogenomic backbone of ten representative Bactrocera species and two outgroups. We further provide the first genome-scaled inference of their divergence by calibrating the clock using fossil records and the spontaneous mutation rate. The results reveal a closer relationship of B. dorsalis with B. latifrons than to B. tryoni, contrary to what was previously supported by mitochondrial-based phylogenies. By employing coalescent-aware and heterogeneous evolutionary models, we show that this incongruence likely derives from a hitherto undetected systematic error, exacerbated by incomplete lineage sorting and possibly hybridization. This agrees with our clock analysis, which supports a rapid and recent radiation of the clade to which B. dorsalis, B. latifrons and B. tryoni belong. These results provide a new picture of Bactrocera phylogeny that can serve as the basis for future comparative analyses.
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Pike, Nathan, and Alan Meats. "Potential for mating between Bactrocera tryoni (Froggatt) and Bactrocera neohumeralis (Hardy) (Diptera: Tephritidae)." Australian Journal of Entomology 41, no. 1 (January 2002): 70–74. http://dx.doi.org/10.1046/j.1440-6055.2002.00256.x.
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Drew, R. A. I., and D. M. Lambert. "On the Specific Status of Dacus (Bactrocera) aquilonis and D. (Bactrocera) tryoni (Diptera: Tephritidae)." Annals of the Entomological Society of America 79, no. 6 (November 1, 1986): 870–78. http://dx.doi.org/10.1093/aesa/79.6.870.
Full textDissertations / Theses on the topic "Bactrocera tryoni"
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Howie, Lynita Joy. "The Influence of Physiological State on Feeding Behaviour of Bactrocera tryoni(Froggatt) (Diptera: Tephritidae)." Thesis, Griffith University, 2008. http://hdl.handle.net/10072/368102.
Full textAbstract:
This thesis examined the feeding behaviour of B. tryoni relative to the physiological
state (sex, maturity, mated state and nutritional condition) of the fly. I particularly
focused on the attraction of B. tryoni to proteinaceous food types with the intention of
explaining fly response as a function of physiological state.
All B. tryoni, irrespective of age, sex or mated state, preferentially feed in the first few
hours after sunrise, both in the laboratory and field cage environment. Sugar feeding
was greatest by mature mated females, followed closely by immature flies (both
sexes). Protein feeding was greatest in immature flies, while mature unmated females
spent very little time in protein feeding. Thus, proteinaceous baits used for B. tryoni
control would be least effective over mature unmated females.
Fly hunger is also relevant in determining how a fly will respond to food types. Some
results with A. ludens suggested that sugar hungry flies had a reduced attraction to
proteinaceous odours, a relevant consequence that significantly reduces the success of
proteinaceous baits. Indeed, gravid female B. tryoni had a much decreased attraction
to bacteria when sugar hungry, but the effect was not significant for immature flies
(both sexes). Therefore, I tested B. tryoni attraction to sugar food (open fruit) and
protein food (bacteria) combined, but the combined odours did not appear to be
significantly more attractive than one food source alone. Gravid females were
primarily attracted to fruit odour as an oviposition resource, independent of their
nutritional condition. Further, gravid females were only significantly attracted
bacterial odour when protein hungry and were repelled when fed. These results then
lead me to a further examination of fly attraction to bacterial odours. Common phyllosphere bacteria are a known protein source for B. tryoni. Anecdotal
evidence suggests that fly attraction to bacteria increases as the bacterial culture ages.
However this was only found true for immature flies. Gravid females that were
protein hungry initially had a strong response to bacterial odours in the exponential
growth phase, but had a much reduced response to stronger bacterial odours in the
stationary / death phase. This supports the theory that bacterial odours represent an
ovipositional deterrent to B. tryoni.
A common volatile released by phyllosphere bacteria, 2-butanone, is also thought to
be the attractive volatile in cue lure (a male B. tryoni sex attractant). However,
mature males had a relatively low response to bacteria, suggesting that bacterial
odours do not act as a sex attractant in the same way as cue lure.
My findings help explain why protein baits may or may not be effective in controlling
B. tryoni and will improve the decision making process when considering how best to
control B. tryoni.Thesis (Masters)
Master of Philosophy (MPhil)
Griffith School of Environment
Science, Environment, Engineering and Technology
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Wang, Yean. "Molecular polymorphisms for phylogeny, pedigree and population structure studies." University of Sydney, 2007. http://hdl.handle.net/2123/1541.
Full textAbstract:
Doctor of PhilosophyA number of types of molecular polymorphisms can be used for studying genetic relationship and evolutionary history. Microsatellites are hypervariable and can be very useful tools to determine population structure, distinguish sibling species, as well as verifying parental relationships and pedigrees. However, while microsatellite polymorphisms are useful for solving relationships between populations within a species, relations among species or genera will probably be obscured due to a high degree of homoplasy —identity arising from evolutionary convergence not by descent. For long range evolutionary history, such as phylogeny from old world monkey to human, mtDNA markers may be better candidates. The aim of this thesis is to assess molecular polymorphisms of different types and their optimal use in different situations. Two widely separated taxa were used for testing –the green monkey Chlorocebus sabaeus, and the sibling dipteran flies Bactrocera tryoni and B. neohumeralis, known collectively as the Queensland fruit fly. In the present study a complete 16,550 bp mtDNA sequence of the green monkey Chlorocebus sabaeus is reported for the fist time and has been annotated (Chapter 2). Knowledge of the mtDNA genome contributes not only to identification of large scale single nucleotide polymorphisms (SNPs) (Chapter 4) or other mtDNA polymorphisms development, but also to primate phylogenetic and evolutionary study (Chapter 3). Microsatellites used for the green monkey paternity and pedigree studies were developed by cross-amplification using human primers (Chapter 5). For studies of population structure and species discrimination in Queensland fruit fly (Chapter 7), microsatellites were isolated from a genomic library of Bactrocera tryoni (Chapter 6) The total length of 16550 bp of complete mtDNA of the green monkey C. sabaeus, which has been sequenced and annotated here, adds a new node to the primate phylogenetic tree, and creates great opportunity for SNP marker development. The heteroplasmic region was cloned and five different sequences from a single individual were obtained; the implication of this are discussed. The phylogenetic tree reconstructed using the complete mtDNA sequence of C. sabaeus and other primates was used to solve controversial taxonomic status of C. sabaeus. Phylogenies of primate evolution using different genes from mtDNA are discussed. Primate evolutionary trees using different substitution types are compared and the phylogenetic trees constructed using transversions for the complete mtDNA were found close to preconceived expectations than those with transversions + transitions. The sequence of C. sabaeus 12SrRNA reported here agrees with the one published by ven der Kuyl et al. (1996), but additional SNPs were identified. SNPs for other regions of mtDNA were explored using dHPLC. Twenty two PCR segments for 96 individuals were tested by dHPLC. Fifty five SNPs were found and 10 haplogroups were established. Microsatellite markers were used to construct a genealogy for a colony of green monkeys (C. sabaeus) in the UCLA Vervet Monkey Research Colony. Sixteen microsatellites cross-amplified from human primers were used to conduct paternity analysis and pedigree construction. Seventy-eight out of 417 offspring were assigned paternity successfully. The low success rate is attributed to a certain proportion of mismatches between mothers and offspring; the fact that not all candidate fathers were sampled, the limitations of microsatellite polymorphisms; and weakness of the exclusion method for paternity assessment. Due to the low success rate, the pedigree is split into a few small ones. In a complicated pedigree composed of 75 animals and up to four generations with multiple links a power male mated with 8 females and contributed 10 offspring to the pedigree. Close inbreeding was avoided. Population structure within two species of Queensland fruit fly Bactrocera tryoni and Bactrocera neohumeralis (Tephritidae: Diptera) is examined using microsatellite polymorphisms. Queensland fruit flies B. tryoni and B. neohumeralis are sympatric sibling species that have similar morphological and ecological features. They even share polymorphism at the molecular level. Mating time difference is the main mechanism by which they maintain separate species. In the present study, 22 polymorphic and scorable microsatellites were isolated from B. tryoni and tested in the two species sampled from sympatric distribution areas. Pairwise genetic distance analysis showed explicit differentiation in allele frequencies between the two species, but very weak differences between conspecific populations. Gene flow is higher within B. tryoni than within B. neohumeralis, and gene exchange between the two species exists. An averaging linkage clustering tree constructed by UPGMA showed two major clusters distinguishing the two species, and it appears that population structure is highly correlated with geographic distance. The relationship between molecular markers, evolution, and selection are discussed using comparative studies within two large taxa: primate and insect. The degree of conservation and polymorphism in microsatellites varies between taxa, over evolutionary time.
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Wang, Yean. "Molecular polymorphisms for phylogeny, pedigree and population structure studies." Thesis, The University of Sydney, 2006. http://hdl.handle.net/2123/1541.
Full textAbstract:
A number of types of molecular polymorphisms can be used for studying genetic relationship and evolutionary history. Microsatellites are hypervariable and can be very useful tools to determine population structure, distinguish sibling species, as well as verifying parental relationships and pedigrees. However, while microsatellite polymorphisms are useful for solving relationships between populations within a species, relations among species or genera will probably be obscured due to a high degree of homoplasy —identity arising from evolutionary convergence not by descent. For long range evolutionary history, such as phylogeny from old world monkey to human, mtDNA markers may be better candidates. The aim of this thesis is to assess molecular polymorphisms of different types and their optimal use in different situations. Two widely separated taxa were used for testing –the green monkey Chlorocebus sabaeus, and the sibling dipteran flies Bactrocera tryoni and B. neohumeralis, known collectively as the Queensland fruit fly. In the present study a complete 16,550 bp mtDNA sequence of the green monkey Chlorocebus sabaeus is reported for the fist time and has been annotated (Chapter 2). Knowledge of the mtDNA genome contributes not only to identification of large scale single nucleotide polymorphisms (SNPs) (Chapter 4) or other mtDNA polymorphisms development, but also to primate phylogenetic and evolutionary study (Chapter 3). Microsatellites used for the green monkey paternity and pedigree studies were developed by cross-amplification using human primers (Chapter 5). For studies of population structure and species discrimination in Queensland fruit fly (Chapter 7), microsatellites were isolated from a genomic library of Bactrocera tryoni (Chapter 6) The total length of 16550 bp of complete mtDNA of the green monkey C. sabaeus, which has been sequenced and annotated here, adds a new node to the primate phylogenetic tree, and creates great opportunity for SNP marker development. The heteroplasmic region was cloned and five different sequences from a single individual were obtained; the implication of this are discussed. The phylogenetic tree reconstructed using the complete mtDNA sequence of C. sabaeus and other primates was used to solve controversial taxonomic status of C. sabaeus. Phylogenies of primate evolution using different genes from mtDNA are discussed. Primate evolutionary trees using different substitution types are compared and the phylogenetic trees constructed using transversions for the complete mtDNA were found close to preconceived expectations than those with transversions + transitions. The sequence of C. sabaeus 12SrRNA reported here agrees with the one published by ven der Kuyl et al. (1996), but additional SNPs were identified. SNPs for other regions of mtDNA were explored using dHPLC. Twenty two PCR segments for 96 individuals were tested by dHPLC. Fifty five SNPs were found and 10 haplogroups were established. Microsatellite markers were used to construct a genealogy for a colony of green monkeys (C. sabaeus) in the UCLA Vervet Monkey Research Colony. Sixteen microsatellites cross-amplified from human primers were used to conduct paternity analysis and pedigree construction. Seventy-eight out of 417 offspring were assigned paternity successfully. The low success rate is attributed to a certain proportion of mismatches between mothers and offspring; the fact that not all candidate fathers were sampled, the limitations of microsatellite polymorphisms; and weakness of the exclusion method for paternity assessment. Due to the low success rate, the pedigree is split into a few small ones. In a complicated pedigree composed of 75 animals and up to four generations with multiple links a power male mated with 8 females and contributed 10 offspring to the pedigree. Close inbreeding was avoided. Population structure within two species of Queensland fruit fly Bactrocera tryoni and Bactrocera neohumeralis (Tephritidae: Diptera) is examined using microsatellite polymorphisms. Queensland fruit flies B. tryoni and B. neohumeralis are sympatric sibling species that have similar morphological and ecological features. They even share polymorphism at the molecular level. Mating time difference is the main mechanism by which they maintain separate species. In the present study, 22 polymorphic and scorable microsatellites were isolated from B. tryoni and tested in the two species sampled from sympatric distribution areas. Pairwise genetic distance analysis showed explicit differentiation in allele frequencies between the two species, but very weak differences between conspecific populations. Gene flow is higher within B. tryoni than within B. neohumeralis, and gene exchange between the two species exists. An averaging linkage clustering tree constructed by UPGMA showed two major clusters distinguishing the two species, and it appears that population structure is highly correlated with geographic distance. The relationship between molecular markers, evolution, and selection are discussed using comparative studies within two large taxa: primate and insect. The degree of conservation and polymorphism in microsatellites varies between taxa, over evolutionary time.
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Tasnin, Mst Shahrima. "Demographic structure and aging in Bactrocera tryoni (Diptera: Tephritidae) in subtropical Australia." Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/207465/1/Mst%20Shahrima_Tasnin_Thesis.pdf.
Full textAbstract:
Queensland fruit fly is a destructive horticultural insect pest. Knowing the age-structure of fly populations, that is the relative proportion of young, middle-age, and old-age flies within a population at a given time, is critical for effective management. The thesis combined behavioural ecology with a novel mathematical analysis to identify the seasonal changes in the age of a wild Queensland fruit fly population. The study showed that the abundance and age-structure of the fly changed predictably with the season, strongly suggestive of an endogenous mechanism that helps the fly cope with seasonal changes in resource availability.
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Nagalingham, Kumaran. "Functional significance of male attractants of Bactrocera tryoni (Diptera: Tephritidae) and underlying mechanisms." Thesis, Queensland University of Technology, 2014. https://eprints.qut.edu.au/67440/1/Kumaran_Nagalingam_Thesis.pdf.
Full textAbstract:
This project elucidated functional role of phytochemicals used in the management of pest fruit flies. Comparative behavioural, physiological and genomic approaches revealed that phytochemicals are mediating reproductive fitness by changing pheromonal compound males release and by making them physiologically more active. The possible mechanistic functions are that the phytochemicals act as a pheromone booster and as an energy supplement.
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Turney, Catherine Louise. "Transposable elements of the mariner family in the tephritid fruit fly, Bactrocera tryoni." Thesis, The University of Sydney, 1998. https://hdl.handle.net/2123/27649.
Full textAbstract:
The research outlined in this thesis primarily focused on the isolation and
characterization of representatives of the mariner family of transposable
elements in the genome of the tephritid, Bactrocera tryoni (Queensland
fruit fly). A preliminary investigation was also made of the mobility
properties of constructs based on the mariner element Mos], following
their transient introduction into the embryonic soma of B. tryoni. This
involved the use of plasmid-based excision and transposition assays. These
studies were partly undertaken to obtain an initial idea of the feasibility of
developing a germline transformation system based on particular mariner
elements for use with B. tryoni, and possibly other related tephritids.
To investigate whether the B. tryoni genome contained endogenous
mariner element copies, an initial PCR analysis was carried out using
degenerate oligonucleotide primers that had previously been designed to
stretches of conserved residues within transposases encoded by particular
mariner elements. Using this approach, examples of at least five distinct
types of mariner elements were detected in the genome of B. tryoni
following the cloning and DNA sequencing of 20 unique amplified
fragments. Phylogenetic analyses using the conceptual amino acid
translations of these partial transposase gene regions indicated that the B.
tryom‘ sequences represented three subfamilies of mariner elements. Using
the same PCR-based approach, diverse mariner sequences were also
isolated from Bactrocera neohumeralis, a sibling species of B. tryoni, and
an additional tephritid, Bactrocera jarvisi.
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Balagawi, Solomon. "Comparative Ecology of Bactrocera Cucumis (French) and Bactrocera Tryoni (Froggatt) (Diptera: Tephritidae) - Understanding the Life History Consequences of Host Selection and Oviposition Behaviour." Thesis, Griffith University, 2007. http://hdl.handle.net/10072/366527.
Full textAbstract:
The host use patterns of tephritids (fruit flies) range from those that are highly specific (monophagous, oligophagous) to those that use a wide range of hosts from different plant families (polyphagous). Knowledge of the mechanisms responsible for such host use patterns is critical in understanding the insect-plant relationship and developing successful population management strategies. Several studies have revealed that the behavioural and environmental factors play a significant role in host use. A key theory thought to explain host use patterns of phytophagous insects has been optimality theory (preference-performance hypothesis), however, this has seldom been investigated in fruit flies. In this thesis I compared the host use pattern of the specialist (oligophagous) cucumber fruit fly, Bactrocera cucumis (French), and the generalist (polyphagous) Queensland fruit fly, Bactrocera tryoni (Froggatt) (Diptera: Tephritidae: Dacinae), both serious agricultural pests in Queensland, Australia. I primarily focussed on investigating the role of the preference-performance hypothesis in explaining the host use pattern of these two species at different plant taxonomic levels. I also examined the life history consequences of host use patterns by investigating the demographies of these two dacines on different host plants. The preference-performance hypothesis postulates that the host preference executed by an insect should be positively correlated to its offspring performance. While there were some correlations between preference and performance parameters for both B. cucumis and B. tryoni, these were dependent on the parameter used and were more relevant in explaining host use patterns in B. cucumis than B. tryoni. Both species exhibited significant host discrimination among the different hosts presented to them. More significantly, they preferentially used certain host plants even when hosts of purportedly equivalent status were presented to them simultaneously. The efficiency with which they used their hosts differed even when offered different varieties of a host species from their primary host family. These patterns, observed in both these dacine species, indicated that host use is more plausibly explained by behavioural and physiological factors associated with host use. Key factors affecting host acceptance behaviour and subsequent host use of dacine fruit flies include pre-alighting factors (e.g., host plant structure, fruit colour, shape and size) and post-alighting factors (e.g., pericarp toughness, fruit volatiles and chemical composition of fruit). I investigated the role of fruit size and pericarp toughness in explaining host use patterns. Pericarp toughness appeared to strongly affect host acceptance and subsequent host use in both dacine species. Although some fruit species were readily accepted for oviposition by receiving a high proportion of oviposition attempts from both fly species, very few of these oviposition attempts resulted in pericarp penetration (oviposition event). This behaviour was primarily attributed to the differences in pericarp toughness; fruits with a tougher pericarp provided greater resistance to ovipositor penetration, thus resulting in less use than those with a softer pericarp. In addition to the behavioural aspects of fruit fly-host plant relationships, life history parameters of tephritid species play a significant role in host use. Investigations of the demography of these species on different hosts revealed that the polyphagous B. tryoni has higher fecundity and net reproductive rate, and shorter generation time while the oligophagous B. cucumis has a lower fecundity and net reproductive rate with a longer generation time. While the demographic patterns of the B. cucumis appeared to conform to preference-performance hypothesis, B. tryoni showed some interesting departures from the predictions of the preference-performance hypothesis. For B. tryoni, it was evident that some hosts that may yield lower survival in terms of larval survival (e.g., plum) may still be demographically suitable because of the enhanced reproductive performance of adults emerging from these fruits. This highlights the significance of the quality of adult feeding resource in the demography of this species. Organizing demographic data and analysing them using population projection models also enabled me to identify critical life stages that influence the demography of these two species across different host fruits. This study found that for both the specialist B. cucumis and the generalist B. tryoni, population growth rate is highly sensitive at the adult reproductive stage, indicating that manipulating probability of survival at this life stage would be critical to manage the population of these pest species. This may explain the success of protein bait sprays as a technique to manage these pest species. Predators or pathogens that target the adult reproductive stage may also provide successful biological control of these pest fruit fly populations. In addition to survival of reproductive individuals, pupal survival was also important to the demography of these species, suggesting that biological control targeting pupal stage may also yield population suppression across different fruit production systems. In summary, my studies showed that, while the preference-performance hypothesis may be a useful heuristic tool in explaining comparative host use patterns in the Dacinae, it may be more valuable in understanding primary adaptations of different species that enable them to use different host plants. This understanding combined with the life-history consequences of host use would not only shed light on their ecology, but also prove valuable in designing suitable management strategies for pest dacines.Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
Australian School of Environmental Studies
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Muthuthantri, Weerawickramage Sakuntala Nayanatara. "Population phenology of the tropical fruit fly, Bactrocera tryoni (Froggatt) (Diptera: Tephritidae), in Queensland, Australia." Thesis, Queensland University of Technology, 2008. https://eprints.qut.edu.au/16671/1/Weerawickramage_Muthuthantri_Thesis.pdf.
Full textAbstract:
Bactrocera tryoni, the Queensland fruit fly, is established along the entire Australian east coast. It is a major pest of horticulture and arguably the worst horticultural insect pest in Australia. Adult flies lay eggs into fruit and resultant larvae feed on the flesh of the fruit. The population biology of B. tryoni has been well studied in temperate regions, where it has been established that climatic factors, particularly temperature and rainfall, limit population growth. In contrast, in subtropical and tropical regions, the population dynamics of the fly have been little studied. This thesis investigates the fly's phenology and abundance changes across subtropical and tropical Queensland and asks what factors govern the population cycles of B. tryoni in this state. Winter breeding and abundance of the fly, a component of the seasonal cycle which in south-east Queensland is fundamentally different from that observed in temperate Australia, is also investigated.
A historical, extensive multi-year and multi-site trapping data set with from across Queensland was analysed to look at the effects of temperature, rainfall and relative humidity on B. tryoni trap catch. Trap data was further compared with the predicted phenology data generated by a DYMEX® based B. tryoni population phenology model. The phenology model used was based on a previously published model, but was also modified to more explicitly look at the effects of host plant availability and the presence or absence of non-reproductive over-wintering flies. Over-wintering field cage studies and a winter-spring field trapping study, both carried out in Brisbane, supplied additional data on B. tryoni's population abundance and capacity to breed during winter in the subtropics.
Results show significant variation of monthly fly abundance for nine sites across Queensland. Abundance changed across sites in non-predictable ways. Annual population phenology within a site was, for some sites, highly consistent from year to year, but inconsistent for other sites. All sites in the subtropics showed some form of population depression during the cooler months, but breeding was continuous, albeit reduced at nearly all sites. Some tropical sites, where the climate is regarded as highly favourable for B. tryoni, still showed dramatic peaks and troughs in annual population abundance. There were relatively few significant correlations observed between weather factors and fly populations for any site. Output from the DYMEX population model suggested that fruit availability is a major driver of population dynamics in the tropical north of the state, while weather is more important in the subtropical south. The population dynamics of B. tryoni at sites along the central Queensland coast, where it is assumed that a mix of both weather and host fruit availability drive local populations, were poorly captured by the population model. Field cage results showed that B. tryoni successfully bred during winter in Brisbane, with pupal emergence starting in mid-winter (1st week of August), peaking in early spring (2nd week of September). Trap catch at orchards in Brisbane increased with increasing temperature and fruit availability, but diminished with decreasing temperature and fruit availability.
The results suggest that B. tryoni has an optimal climate for population growth in the tropics, but fruit availability for offspring production limits population growth. In the subtropics however, both climate and fruit availability determine the population size. Winter temperatures are marginal for B. tryoni population growth in the subtropics.
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Muthuthantri, Weerawickramage Sakuntala Nayanatara. "Population phenology of the tropical fruit fly, Bactrocera tryoni (Froggatt) (Diptera: Tephritidae), in Queensland, Australia." Queensland University of Technology, 2008. http://eprints.qut.edu.au/16671/.
Full textAbstract:
Bactrocera tryoni, the Queensland fruit fly, is established along the entire Australian east coast. It is a major pest of horticulture and arguably the worst horticultural insect pest in Australia. Adult flies lay eggs into fruit and resultant larvae feed on the flesh of the fruit. The population biology of B. tryoni has been well studied in temperate regions, where it has been established that climatic factors, particularly temperature and rainfall, limit population growth. In contrast, in subtropical and tropical regions, the population dynamics of the fly have been little studied. This thesis investigates the fly's phenology and abundance changes across subtropical and tropical Queensland and asks what factors govern the population cycles of B. tryoni in this state. Winter breeding and abundance of the fly, a component of the seasonal cycle which in south-east Queensland is fundamentally different from that observed in temperate Australia, is also investigated. A historical, extensive multi-year and multi-site trapping data set with from across Queensland was analysed to look at the effects of temperature, rainfall and relative humidity on B. tryoni trap catch. Trap data was further compared with the predicted phenology data generated by a DYMEX® based B. tryoni population phenology model. The phenology model used was based on a previously published model, but was also modified to more explicitly look at the effects of host plant availability and the presence or absence of non-reproductive over-wintering flies. Over-wintering field cage studies and a winter-spring field trapping study, both carried out in Brisbane, supplied additional data on B. tryoni's population abundance and capacity to breed during winter in the subtropics. Results show significant variation of monthly fly abundance for nine sites across Queensland. Abundance changed across sites in non-predictable ways. Annual population phenology within a site was, for some sites, highly consistent from year to year, but inconsistent for other sites. All sites in the subtropics showed some form of population depression during the cooler months, but breeding was continuous, albeit reduced at nearly all sites. Some tropical sites, where the climate is regarded as highly favourable for B. tryoni, still showed dramatic peaks and troughs in annual population abundance. There were relatively few significant correlations observed between weather factors and fly populations for any site. Output from the DYMEX population model suggested that fruit availability is a major driver of population dynamics in the tropical north of the state, while weather is more important in the subtropical south. The population dynamics of B. tryoni at sites along the central Queensland coast, where it is assumed that a mix of both weather and host fruit availability drive local populations, were poorly captured by the population model. Field cage results showed that B. tryoni successfully bred during winter in Brisbane, with pupal emergence starting in mid-winter (1st week of August), peaking in early spring (2nd week of September). Trap catch at orchards in Brisbane increased with increasing temperature and fruit availability, but diminished with decreasing temperature and fruit availability. The results suggest that B. tryoni has an optimal climate for population growth in the tropics, but fruit availability for offspring production limits population growth. In the subtropics however, both climate and fruit availability determine the population size. Winter temperatures are marginal for B. tryoni population growth in the subtropics.
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Muhmed, Aead M. Abdelnabi. "The role of learning in the ecology of Diachasmimorpha kraussii (Fullaway) (Hymenoptera: Braconidae: Opiinae), and implications for tephritid pest management." Thesis, Queensland University of Technology, 2018. https://eprints.qut.edu.au/116351/1/Aead%20M%20Abdelnabi_Muhmed_Thesis.pdf.
Full textAbstract:
Fruit flies are serious pests of fruit around the world, as their maggots destroy fruit by feeding within them. An important non-pesticide control option for fruit flies is the use of natural enemies. This study investigated the role of memory and learning in the host searching behaviour of one such natural enemy, the small wasp, Diachasmimorpha kraussii. This wasp is native to Australia and attacks our most serious fruit fly pest, the Queensland Fruit Fly. This research studied fundamental insect behaviour, but produced specific recommendations for the more effective use of Diachasmimorpha kraussii for sustainable pest management.
Book chapters on the topic "Bactrocera tryoni"
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Choo, Amanda, Elisabeth Fung, Thu N. M. Nguyen, Anzu Okada, and Peter Crisp. "CRISPR/Cas9 Mutagenesis to Generate Novel Traits in Bactrocera tryoni for Sterile Insect Technique." In Methods in Molecular Biology, 151–71. New York, NY: Springer US, 2022. http://dx.doi.org/10.1007/978-1-0716-2301-5_9.
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Fisher, Kingsley. "Queensland Fruit Fly (Bactrocera tryoni): Eradication from Western Australia." In Fruit Fly Pests, 535–41. CRC Press, 2020. http://dx.doi.org/10.1201/9780367812430-89.
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Fisher, Kingsley. "The Eradication Of The Queensland Fruit Fly, Bactrocera Tryoni, From Western Australia." In Fruit Flies and the Sterile Insect Technique, 237–46. CRC Press, 2019. http://dx.doi.org/10.1201/9781351072168-17.
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Frommer, Marianne, Alfie Meats, Deirdre Sharkey, Deborah Shearman, John Sved, and Catherine Turney. "Sequence from Eye Colour Genes, Chorion Gene and Mariner-Like Transposable Elements in the Queensland Fruit Fly, Bactrocera tryoni." In Fruit Fly Pests, 209–20. CRC Press, 2020. http://dx.doi.org/10.1201/9780367812430-35.
Full textConference papers on the topic "Bactrocera tryoni"
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Voice, Dave. "Diagnostics response to the detection and eradication of Queensland fruit fly (Bactrocera tryoni) inAuckland, New Zealand." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.113088.
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Akter, Humayra. "Raspberry ketone as a promising pre-release supplement for Sterile Insect Technique programs of Queensland fruit fly,Bactrocera tryoni." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.108192.
Full textReports on the topic "Bactrocera tryoni"
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Aguilar, Glenn, Dan Blanchon, Hamish Foote, Christina Pollonais, and Asia Mosee. Queensland Fruit Fly Invasion of New Zealand: Predicting Area Suitability Under Future Climate Change Scenarios. Unitec ePress, October 2017. http://dx.doi.org/10.34074/pibs.rs22015.
Full textAbstract:
The Queensland fruit fly (Bactrocera tryoni) is a significant horticultural pest in Australia, and has also established in other parts of the Pacific. There is a significant risk to New Zealand of invasion by this species, and several recent incursions have occurred. The potential effects of climate change on the distribution and impacts of invasive species are well known. This paper uses species distribution modelling using Maxent to predict the suitability of New Zealand to the Queensland fruit fly based on known occurrences worldwide and Bioclim climatic layers. Under current climatic conditions the majority of the country was generally in the lower range, with some areas in the medium range. Suitability prediction maps under future climate change conditions in 2050 and 2070, at lower emission (RCP 2.6) and higher emission (RCP 8.5) scenarios generally show an increase in suitability in both the North and South Islands. Calculations of the shift of suitable areas show a general movement of the centroid towards the south-east, with the higher emission scenario showing a greater magnitude of movement.