The Experts below are selected from a list of 12102 Experts worldwide ranked by ideXlab platform
Daniel Rubinoff - One of the best experts on this subject based on the ideXlab platform.
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highly variable coi haplotype diversity between three species of Invasive Pest fruit fly reflects remarkably incongruent demographic histories
Scientific Reports, 2020Co-Authors: Camiel Doorenweerd, Michael San Jose, Norman B Barr, Luc Leblanc, Daniel RubinoffAbstract:Distance decay principles predict that species with larger geographic ranges would have greater intraspecific genetic diversity than more restricted species. However, Invasive Pest species may not follow this prediction, with confounding implications for tracking phenomena including original ranges, invasion pathways and source populations. We sequenced an 815 base-pair section of the COI gene for 441 specimens of Bactrocera correcta, 214 B. zonata and 372 Zeugodacus cucurbitae; three Invasive Pest fruit fly species with overlapping hostplants. For each species, we explored how many individuals would need to be included in a study to sample the majority of their haplotype diversity. We also tested for phylogeographic signal and used demographic estimators as a proxy for invasion potency. We find contrasting patterns of haplotype diversity amongst the species, where B. zonata has the highest diversity but most haplotypes were represented by singletons; B. correcta has ~7 dominant haplotypes more evenly distributed; Z. cucurbitae has a single dominant haplotype with closely related singletons in a ‘star-shape’ surrounding it. We discuss how these differing patterns relate to their invasion histories. None of the species showed meaningful phylogeographic patterns, possibly due to gene-flow between areas across their distributions, obscuring or eliminating substructure.
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highly variable coi haplotype diversity between three species of Invasive Pest fruit fly reflects remarkably incongruent demographic histories
bioRxiv, 2019Co-Authors: Camiel Doorenweerd, Michael San Jose, Norman B Barr, Luc Leblanc, Daniel RubinoffAbstract:Abstract Distance decay principles predict that species with larger geographic ranges would have greater intraspecific genetic diversity than more restricted species. However, Invasive Pest species may not follow this prediction, with confounding implications for tracking phenomena including original ranges, invasion pathways and source populations. We sequenced an 815 base-pair section of the COI gene for 441 specimens of Bactrocera correcta, 214 B. zonata and 372 Zeugodacus cucurbitae; three Invasive Pest fruit fly species with overlapping hostplants. For each species, we explored how many individuals would need to be included in a study to sample the majority of their haplotype diversity. We also tested for phylogeographic signal and used demographic estimators as a proxy for invasion potency. We find contrasting patterns of haplotype diversity amongst the species, where B. zonata has the highest diversity but most haplotypes were represented by singletons; B. correcta has ∼7 dominant haplotypes more evenly distributed; Z. cucurbitae has a single dominant haplotype with closely related singletons in a ‘star-shape’ surrounding it. We discuss how these differing patterns relate to their invasion histories. None of the species showed meaningful phylogeographic patterns, possibly due to gene-flow between areas across their distributions, obscuring or eliminating substructuring.
Catherine M Little - One of the best experts on this subject based on the ideXlab platform.
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susceptibility of selected boreal fruits and berries to the Invasive Pest drosophila suzukii diptera drosophilidae
Pest Management Science, 2017Co-Authors: Catherine M Little, Thomas W Chapman, Debra L Moreau, Kirk N HillierAbstract:BACKGROUND Drosophila suzukii Matsumara has recently emerged as a major Invasive Pest species in soft-skinned fruits in berries throughout North America and Europe. Its distribution has spread so rapidly that little is known of the extent of fruit susceptibility, particularly in boreal regions. Populations of D. suzukii increase dramatically in late summer in boreal regions, concurrent with fruiting seasons for commercially and culturally significant fruits and berries. We tested fruit preference and susceptibility of lingonberry, blueberry, chokecherry, sea buckthorn and raspberry fruits to D. suzukii. RESULTS Female D. suzukii attempted to oviposit on all fruit types tested. Fruits with lower brix and lower pH levels were preferred in choice tests. Undamaged lingonberries were relatively safe from infestation; however, bruised or frost-damaged fruits were easily penetrated. Sea buckthorn and raspberry fruits were highly preferred. CONCLUSION Although blueberry growers have experienced severe economic crop losses due to D. suzukii, we have found that blueberries were the least preferred of the fruits tested. This suggests that D. suzukii are largely opportunistic and highlights the importance of fruit phenology in fruit susceptibility. © 2016 Society of Chemical Industry
Camiel Doorenweerd - One of the best experts on this subject based on the ideXlab platform.
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highly variable coi haplotype diversity between three species of Invasive Pest fruit fly reflects remarkably incongruent demographic histories
Scientific Reports, 2020Co-Authors: Camiel Doorenweerd, Michael San Jose, Norman B Barr, Luc Leblanc, Daniel RubinoffAbstract:Distance decay principles predict that species with larger geographic ranges would have greater intraspecific genetic diversity than more restricted species. However, Invasive Pest species may not follow this prediction, with confounding implications for tracking phenomena including original ranges, invasion pathways and source populations. We sequenced an 815 base-pair section of the COI gene for 441 specimens of Bactrocera correcta, 214 B. zonata and 372 Zeugodacus cucurbitae; three Invasive Pest fruit fly species with overlapping hostplants. For each species, we explored how many individuals would need to be included in a study to sample the majority of their haplotype diversity. We also tested for phylogeographic signal and used demographic estimators as a proxy for invasion potency. We find contrasting patterns of haplotype diversity amongst the species, where B. zonata has the highest diversity but most haplotypes were represented by singletons; B. correcta has ~7 dominant haplotypes more evenly distributed; Z. cucurbitae has a single dominant haplotype with closely related singletons in a ‘star-shape’ surrounding it. We discuss how these differing patterns relate to their invasion histories. None of the species showed meaningful phylogeographic patterns, possibly due to gene-flow between areas across their distributions, obscuring or eliminating substructure.
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highly variable coi haplotype diversity between three species of Invasive Pest fruit fly reflects remarkably incongruent demographic histories
bioRxiv, 2019Co-Authors: Camiel Doorenweerd, Michael San Jose, Norman B Barr, Luc Leblanc, Daniel RubinoffAbstract:Abstract Distance decay principles predict that species with larger geographic ranges would have greater intraspecific genetic diversity than more restricted species. However, Invasive Pest species may not follow this prediction, with confounding implications for tracking phenomena including original ranges, invasion pathways and source populations. We sequenced an 815 base-pair section of the COI gene for 441 specimens of Bactrocera correcta, 214 B. zonata and 372 Zeugodacus cucurbitae; three Invasive Pest fruit fly species with overlapping hostplants. For each species, we explored how many individuals would need to be included in a study to sample the majority of their haplotype diversity. We also tested for phylogeographic signal and used demographic estimators as a proxy for invasion potency. We find contrasting patterns of haplotype diversity amongst the species, where B. zonata has the highest diversity but most haplotypes were represented by singletons; B. correcta has ∼7 dominant haplotypes more evenly distributed; Z. cucurbitae has a single dominant haplotype with closely related singletons in a ‘star-shape’ surrounding it. We discuss how these differing patterns relate to their invasion histories. None of the species showed meaningful phylogeographic patterns, possibly due to gene-flow between areas across their distributions, obscuring or eliminating substructuring.
Karamoko Diarra - One of the best experts on this subject based on the ideXlab platform.
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rapid spread of the tomato leafminer tuta absoluta lepidoptera gelechiidae an Invasive Pest in sub saharan africa
Entomologia Generalis, 2017Co-Authors: Serigne Sylla, Thierry Brevault, Anais Chailleux, Mamadou Diatte, Nicolas Desneux, Karamoko DiarraAbstract:Abstract The Invasive tomato leafminer, Tuta absoluta (Meyrick) (Lepidoptera, Gelechiidae) has become a real threat for the continued production of tomatoes across Sub-Saharan Africa since its first detection in Senegal. However, little is known of its geographical expansion, seasonal population dynamics, and damage to crops. A trapping network was deployed in 2014 and 2015 in Senegal to monitor the dynamics of T. absoluta populations at a regional and nationwide scale. A field network was also implemented in the most infested area to get information on the Pest incidence during the 2013–2014 cropping season. In 2014, pheromone traps did not detect the presence of T. absoluta moths in remote areas of Eastern Senegal. In 2015, moths were detected in all the fifteen monitored areas deployed throughout the country. Abundance of trapped moths was greatest in 'Niayes', the main tomato-producing area. Unexpectedly, T. absoluta moths were trapped in some areas with few or no tomato crops, including off-season in the 'Vallee du fleuve', hot drylands ('Matam' and 'Kidira') and urban environments ('Dakar'). This suggests high mobility of moth populations and capacity to survive in harsh environments and to persist on alternative host plants. Field monitoring in the main tomato-producing area showed a very low incidence of T. absoluta over the early dry season (0–2% mined leaves), followed by severe outbreaks during the late dry season (up to 60% mined leaves). Results on the Invasive Pest occurrence will be helpful to decision-makers with a view to develop alternative strategies such as biological control by indigenous natural enemies or collective management strategies based on the temporal or spatial exclusion of host crops. (Resume d'auteur)
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Rapid spread of the tomato leafminer, Tuta absoluta (Lepidoptera: Gelechiidae), an Invasive Pest in Sub-Saharan Africa
Entomologia Generalis, 2017Co-Authors: Serigne Sylla, Thierry Brevault, Anais Chailleux, Mamadou Diatte, Nicolas Desneux, Amadou Bocar Bal, Karamoko DiarraAbstract:The Invasive tomato leafminer, Tuta absoluta (Meyrick) (Lepidoptera, Gelechiidae) has become a real threat for the continued production of tomatoes across Sub-Saharan Africa since its first detection in Senegal. However, little is known of its geographical expansion, seasonal population dynamics, and damage to crops. A trapping network was deployed in 2014 and 2015 in Senegal to monitor the dynamics of T. absoluta populations at a regional and nationwide scale. A field network was also implemented in the most infested area to get information on the Pest incidence during the 2013-2014 cropping season. In 2014, pheromone traps did not detect the presence of T absoluta moths in remote areas of Eastern Senegal. In 2015, moths were detected in all the fifteen monitored areas deployed throughout the country. Abundance of trapped moths was greatest in 'Mayes', the main tomato-producing area. Unexpectedly, T absoluta moths were trapped in some areas with few or no tomato crops, including off-season in the 'Vallee du fleuve', hot drylands ('Matam' and 'Kidira') and urban environments ('Dakar'). This suggests high mobility of moth populations and capacity to survive in harsh environments and to persist on alternative host plants. Field monitoring in the main tomato-producing area showed a very low incidence of T absoluta over the early dry season (0-2% mined leaves), followed by severe outbreaks during the late dry season (up to 60% mined leaves). Results on the Invasive Pest occurrence will be helpful to decision-makers with a view to develop alternative strategies such as biological control by indigenous natural enemies or collective management strategies based on the temporal or spatial exclusion of host crops.
Dominique Mazzi - One of the best experts on this subject based on the ideXlab platform.
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worldwide population genetic structure of the oriental fruit moth grapholita molesta a globally Invasive Pest
BMC Ecology, 2013Co-Authors: Heather Kirk, Silvia Dorn, Dominique MazziAbstract:Background Invasive Pest species have large impacts on agricultural crop yields, and understanding their population dynamics is important for ensuring food security. The oriental fruit moth Grapholita molesta is a cosmopolitan Pest of stone and pome fruit species including peach and apple, and historical records indicate that it has invaded North and South America, Europe, Australia and Africa from its putative native range in Asia over the past century.
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Worldwide population genetic structure of the oriental fruit moth (Grapholita molesta), a globally Invasive Pest
BMC ecology, 2013Co-Authors: Heather Kirk, Silvia Dorn, Dominique MazziAbstract:Background: Invasive Pest species have large impacts on agricultural crop yields, and understanding their population dynamics is important for ensuring food security. The oriental fruit moth Grapholita molesta is a cosmopolitan Pest of stone and pome fruit species including peach and apple, and historical records indicate that it has invaded North and South America, Europe, Australia and Africa from its putative native range in Asia over the past century. Results: We used 13 microsatellite loci, including nine newly developed markers, to characterize global population structure of G. molesta. Approximately 15 individuals from each of 26 globally distributed populations were genotyped. A weak but significant global pattern of isolation-by-distance was found, and G. molesta populations were geographically structured on a continental scale. Evidence does not support that G. molesta was introduced to North America from Japan as previously proposed. However, G. molesta was probably introduced from North America to The Azores, South Africa, and Brazil, and from East Asia to Australia. Shared ancestry was inferred between populations from Western Europe and from Brazil, although it remains unresolved whether an
