Tara D. Gariepy's research while affiliated with Agriculture and Agri-Food Canada and other places

Publications (64)

Preprint
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Many animals lay their eggs in clusters. Eggs on the periphery of clusters can be at higher risk of mortality. We asked whether the most commonly occurring clutch sizes in pentatomid bugs could result from geometrical arrangements that maximize the proportion of eggs in the cluster's interior. Although the most common clutch sizes do not correspond...
Preprint
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Predicting how much of a host or prey population may be attacked by their natural enemies is fundamental to several subfields of applied ecology, particularly biological control of pest organisms. Hosts or prey can occupy refuges from natural enemy attack, but habitat or ecological refuges are challenging or impossible to predict in a laboratory se...
Conference Paper
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The Sixth International Symposium on Biological Control of Arthropods, held virtually from British Columbia, Canada, continues the series of International Symposia on Biological Control of Arthropods, organized every four years. The history of the meetings is: • First ISBCA, Hawaii, USA – January 2002 • Second ISBCA, Davos, Switzerland – September...
Article
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Understanding competition between scelionid parasitoids that exploit the same host may provide insight into strategies that allow coexistence on a shared resource. Competition studies typically focus on interactions between native and exotic parasitoids that do not share an evolutionary history; however, coevolved parasitoids may be more likely to...
Article
The arrival, establishment and pest status of Halyomorpha halys in Europe and non-native countries in Asia have been well-documented, with thorough characterisation of the genetic diversity and occurrence of cytochrome oxidase I (COI) haplotypes in Switzerland, France, Hungary, Italy and Greece. However, a number of gaps exist in terms of the chara...
Article
In blueberry crops, there are multiple pest species, and some of those can be suppressed by natural enemies including parasitoid wasps and predators. Parasitoid wasps occur within the environment often tracking pest species for food resources to complete their lifecycle. These small wasps are also sensitive to agricultural environments including ag...
Article
Halyomorpha halys (Hemiptera: Pentatomidae) is an emerging pest which established in Ontario, Canada, in 2012. Halyomporpha halys overwinters in anthropogenic structures as an adult. We investigated seasonal variation in the cold tolerance, water balance, and energetics of H. halys in southwestern Ontario. We also induced diapause in laboratory-rea...
Article
Full-text available
The arrival, establishment and pest status of Halyomorpha halys in Europe and non-native countries in Asia have been well-documented, with thorough characterisation of the genetic diversity and occurrence of cytochrome oxidase I (COI) haplotypes in Switzerland, France, Hungary, Italy and Greece. However, a number of gaps exist in terms of the chara...
Article
Full-text available
Hidden trophic interactions are important in understanding food web ecology and evaluating the ecological risks and benefits associated with the introduction of exotic natural enemies in classical biological control programs. Although non-target risk is typically evaluated based on evidence of successful parasitism, parasitoid-induced host mortalit...
Article
The apple leaf midge, Dasineura mali (Kieffer) (Diptera: Cecidomyiidae), an invasive alien pest established for many years in Nova Scotia, Canada, has invaded Ontario and British Columbia, Canada apple ( Malus domestica Borkhausen; Rosaceae) orchards, damaging growing tips of trees. Molecular analysis indicated that Nova Scotia populations are gene...
Article
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A species of Idris Förster (Hymenoptera: Scelionidae) is found to parasitize the eggs of Bagrada hilaris (Hemiptera: Pentatomidae) and is described as new: Idris elba Talamas, sp. nov. This is the first association of an Idris species with a non-spider host, and the association is confirmed with molecular diagnostic tools that enable identification...
Article
Invasive species can destabilize ecological communities by becoming novel hosts, prey, predators or competitors for native species. They can have lasting effects on population dynamics when they reduce the fitness of native individuals. The establishment and spread of invasive Halyomorpha halys, in Europe and North America, have presented native na...
Article
We report the detection and adventive establishment of the samurai wasp, Trissolcus japonicus (Ashmead) (Hymenoptera: Scelionidae), a candidate classical biological control agent for the invasive Halyomorpha halys (Stål) (Hemiptera: Pentatomidae), in southwestern Ontario, Canada. Nine naturally laid, field-collected pentatomid egg masses were colle...
Article
Globally, Anastatus species (Hymenoptera: Eupelmidae) are associated with the invasive agricultural pest Halyomorpha halys (Stål) (Hemiptera: Pentatomidae). In Europe, the polyphagous Anastatus bifasciatus (Geoffroy) is the most prevalent native egg parasitoid on H. halys eggs and is currently being tested as a candidate for augmentative biological...
Article
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The bertha armyworm (BAW), Mamestra configurata, is a significant pest of canola (Brassica napus L. and B. rapa L.) in western North America that undergoes cyclical outbreaks every 6-8 years. During peak outbreaks millions of dollars are spent on insecticidal control and, even with control efforts, subsequent damage can result in losses worth milli...
Article
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An adventive aphid and novel host-parasitoid association from cultivated strawberry (Fragaria × ananessa Duch. cv. Chandler; Fragaria × ananessa Duch. cv. Camarosa) in Mississippi, USA are reported herein. The aphid, first detected in high tunnel cultivation, was found predominately on newly emerged, not fully developed leaflets of daughter plants...
Article
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Following introduction of Halyomorpha halys in Europe and North America, a concerted effort has been made to characterize host–parasitoid interactions involving H. halys. Yet, it is unclear whether the reported low parasitism in the field is due to the rejection of H. halys by native parasitoids, or the inability of larvae to develop. To determine...
Article
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We report the first detection of Trissolcus japonicus, an exotic Asian egg parasitoid and the primary candidate for classical biological control of the invasive brown marmorated stink bug, Halyomorpha halys, in Canada. Twenty-eight Trissolcus japonicus emerged from an H. halys egg mass from a site heavily infested by H. halys in Chilliwack, British...
Article
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Foraging parasitoid females should preferentially oviposit on hosts most suitable for progeny development to maximize their fitness. However, the introduction of a new host species may disrupt the link between the reliability of the cues and the expected adaptive outcome of female choice, leading to an evolutionary trap. This mismatch between behav...
Article
The establishment of invasive Halyomorpha halys (Stål) outside of its native range may impact native species assemblages, including other pentatomids and their scelionid parasitoids. This has generated interest in defining species diversity and host‐parasitoid associations in this system to better understand the impact of invasive alien species on...
Article
Climatic requirements of natural enemies have important implications for predicting the outcome of classical biological control programs. A five year study (2011-2015) investigated the ectoparasitoid community of the oilseed rape pest Ceutorhynchus obstrictus (Coleoptera: Curculionidae), in different climate zones across Europe to better understand...
Article
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The pepper weevil, Anthonomus eugenii Cano (Coleoptera: Curculionidae), is the most important pest of pepper ( Capsicum Linnaeus; Solanaceae) crops in North America. Native to Mexico, the southern United States of America, and Central America, it is intercepted in Canada when peppers are imported to supplement domestic production. Given the proximi...
Article
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The brown marmorated stinkbug, Halyomorpha halys, is an invasive insect pest in North America and Europe that attacks crop species and causes substantial economic damage. To evaluate the genetic diversities and distributions of different H. halys populations in East Asia, North America, and Europe, COI sequences obtained from 79 new specimens from...
Article
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We report four new detections of invasive agricultural pest Halyomorpha halys (Stål) (Hempitera: Pentatomidae), the brown marmorated stink bug, in the Lower Mainland and Okanagan Valley regions of British Columbia (BC), Canada, in 2015 and 2016. These finds include two confirmed breeding populations, as well as homeowner collections at the same res...
Conference Paper
Interspecific interactions between native and exotic parasitoids can impact community structure and are relevant not only from an ecological standpoint, but also from a biological control standpoint. A thorough understanding of these interactions is critical to estimate the range of potential direct and indirect effects, positive or negative, assoc...
Article
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The brown marmorated stink bug, Halyomorpha halys (Stål), native to China, Japan, and Korea, has emerged as a harmful invasive pest of a variety of crops in North America and Europe. The Asian egg parasitoid Trissolcus japonicus has been identified as the most promising agent for classical biological control of invasive H. halys populations. A 4-ye...
Article
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Introduction of exotic natural enemies for biological control of invasive pests may disrupt existing ecological interactions, which may influence the outcome of biological control introductions. The interactions between Asian egg parasitoids, proposed as classical biological control agents of the highly polyphagous invasive pest Halyomorpha halys (...
Article
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Studies of realized niche shift and model transferability in alien species usually ignore the potential effects of source populations and different invaded-range environments on niche lability. We incorporate our detailed knowledge of the native-range source populations and global introduction history of brown marmorated stink bug (Halyomorpha haly...
Conference Paper
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This proceedings contains papers dealing with issues affecting biological control, particularly pertaining to the use of parasitoids and predators as biological control agents. This includes all approaches to biological control: conservation, augmentation, and importation of natural enemy species for the control of arthropod targets, as well as oth...
Chapter
This proceedings contains papers dealing with issues affecting biological control, particularly pertaining to the use of parasitoids and predators as biological control agents. This includes all approaches to biological control: conservation, augmentation, and importation of natural enemy species for the control of arthropod targets, as well as oth...
Article
Full-text available
The pepper weevil, Anthonomus eugenii Cano, is an important crop pest in Mexico and the United States where it poses an ongoing threat to commercial pepper production (Elmore et al., 1934; Peck, 1963). It is also encountered in peppers imported from these regions into Canada when the domestic production of peppers in wintertime is insufficient to m...
Article
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The introduction of an exotic species may alter food webs within the ecosystem and significantly affect the biodiversity of indigenous species at different trophic levels. It has been postulated that recent introduction of the brown marmorated stinkbug (Halyomorpha halys (Stål)) represents an evolutionary trap for native parasitoids, as they accept...
Article
Drosophila suzukii is an emerging global pest of soft fruit; although it likely overwinters as an adult, larval cold tolerance is important both for determining performance during spring and autumn, and for the development of temperature-based control methods aimed at larvae. We examined the low temperature biology of third instar feeding and wande...
Conference Paper
Introduction: When assessing the impact of invasive species, it is important to consider how the behavioural response of indigenous natural enemies to the invader could mediate indirect ecological effects within invaded host/prey communities. In this context, we assessed the behavioural response of indigenous North American and European egg parasit...
Presentation
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L’Académie d’agriculture de France organise fréquemment des événements pour faire le points sur des domaines pertinents à son mandat. Certains de ces événements sont disponibles gratuitement en streaming. Le 9 mars 2016 à Paris, lors d’une séance de l’Académie d’agriculture de France intitulée «La lutte biologique: regards transatlantiques» (Odile...
Article
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Blueberry spanworm, Itame (Macaria) argillacearia Packard, is an important defoliator of lowbush blueberry (Vaccinium angustifolium Aiton), a major crop in eastern Canada. In the summer of 2012, we collected a large number of blueberry spanworm larvae from two managed blueberry fields in Colchester Co., Nova Scotia. Approximately 50-60 % of the fie...
Article
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Originating in East Asia, the brown marmorated stink bug, Halyomorpha halys, has established in North America and Europe where it has become an urban and agricultural pest. Although initial populations in Europe were only reported in Switzerland, H. halys has expanded its range to include areas in France, Greece, Hungary, and Italy. Analysis of a p...
Article
Drosophila suzukii (Matsumura) (Diptera: Drosophilidae) is a worldwide emerging pest of soft fruits, but its cold tolerance has not been thoroughly explored. We determined the cold tolerance strategy, low temperature thermal limits, and plasticity of cold tolerance in both male and female adult D. suzukii. We reared flies under common conditions (l...
Article
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http://link.springer.com/article/10.1007/s10340-015-0670-2 The brown marmorated stink bug, Halyomorpha halys (Hemiptera: Pentatomidae), has emerged as a harmful invasive insect pest in North America and Europe in the 1990s and 2000s, respectively. Native to eastern Asia, this highly polyphagous pest (>120 different host plants) is spreading rapidly...
Article
Drosophila suzukii Matsumura is a recent invasive fruit pest in North and South America and Europe, causing pre-harvest damage and significant economic losses to crops. Little is known about biological control of D. suzukii; here we report the predatory capability of Dalotia (Atheta) coriaria Kraatz, a commercially available control agent against s...
Conference Paper
In China, the brown marmorated stinkbug, Halyomorpha halys, is parasitized by a complex of egg parasitoids, of which Trissolcus japonicus is considered the most effective species. Previous studies have reported egg parasitism of 60 to 80% in various regions of China. However, the seasonal activity of T. japonicus and other species as well as their...
Article
Halyomorpha halys Stål (Hemiptera: Pentatomidae), the brown marmorated stink bug (BMSB), has been intercepted numerous times in Canada, and overwintering BMSB adults have been reported by homeowners. However, established breeding populations were not detected before 2012. Here we report the occurrence of established populations of BMSB in southern...
Article
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Brown marmorated stink bug, Halyomorpha halys Stål, is an invasive, herbivorous insect species that was accidentally introduced to the United States from Asia. First discovered in Allentown, PA, in 1996, H. halys has now been reported from at least 40 states in the United States. Additional invasions have been detected in Canada, Switzerland, Franc...
Article
Invasive alien species can act as ‘evolutionary traps’ for indigenous parasites and predators when the alien species is accepted as prey or a host but is unsuitable for consumption or development. We tested the relationship between acceptance and suitability of eggs of the invasive alien Halyomorpha halys (Hemiptera: Pentatomidae) in North America...
Conference Paper
Full-text available
A public survey to determine the current distribution of the invasive brown marmortaed stink bug, Halyomorpha halys in Switzerland showed that by the end of 2013, it was present in 11 Cantons, including six newly invaded Cantons (Basel-Landschaft, Aargau, Genève, Solothurn, Ticino, Thurgau, and Bern). In total, H. halys was found in 76 locations in...
Article
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The invasive stink bug Halyomorpha halys Stål (Hemiptera: Pentatomidae) has recently become established in Canada, but little information is available regarding the ability of natural enemies to attack this pest in its invaded range. We tested the capacity of several life stages of three generalist predators, Chrysoperla carnea (Stephens) (Neuropte...
Article
Halyomorpha halys has recently established in countries outside of its Asian area of origin. In the North Eastern USA, this pest causes severe economic loss in agricultural crops. Breeding populations have been confirmed in Switzerland and Canada; however their pathways of entry and genetic diversity remain unknown. To determine invasion pathways a...
Article
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http://www.cabi.org/isc/?compid=5&dsid=27377&loadmodule=datasheet&page=481&site=144
Article
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Genotyping of Ixodes scapularis Say (Acari: Ixodidae) ticks could enhance understanding of the occurrence and genotypes of I. scapularis-borne pathogens. We investigated the utility of mitochondrial (mt) Cytochrome C Oxidase subunit I gene (cox1) sequences as a tool for understanding the population structure of I. scapularis collected in Canada, wh...
Chapter
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Pest Status: The tarnished plant bug, Lygus lineolaris (Palisot de Beauvois) (Hemiptera: Miridae), is the most widespread of the 29 Nearctic species of native Lygus spp. (Schwartz and Foottit, 1998). It is polyphagous (Young, 1986) and damages vegetables, fruits, green-house crops, canola, Brassica napus L. and B. rapa L. (Brassicaceae) and legume...
Article
Ticks are among the most important vectors of disease in the Northern Hemisphere, and a better understanding of their feeding behaviour and life cycle is critical to the management and control of tick-borne zoonoses. DNA-based tools for the identification of residual bloodmeals in hematophagous arthropods have proven useful in the investigation of...
Article
There has been much debate regarding the impact of parasitoid competition and hyperparasitism on the successful biological control of aphid pests. Difficulty in the evaluation of interspecific interactions and trophic links using conventional rearing and dissection methods has prevented a deeper understanding of such relationships. The analysis of...
Article
* 1 Peristenus digoneutis Loan is a parasitoid of Lygus plant bugs, which was successfully introduced from Europe into North America in the 1980s for controlling native Lygus populations. Surveys confirmed that P. digoneutis populations have become established throughout eastern North America and that the spread of the parasitoid continues. For unk...
Article
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Collections of parasitoids attacking the soybean aphid, Aphis glycines Matsumura (Hemiptera: Aphididae), in South Korea yielded specimens that were originally identified as Binodoxys communis (Gahan) (Hymenoptera: Braconidae). We report here on laboratory studies indicating that this population is actually a previously unknown species of Binodoxys....
Article
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Lygus Hahn plant bugs (Hemiptera: Miridae) are serious pests of a wide variety of economically important crops in North America. European Peristenus digoneutis Loan and P. relictus Ruthe (Hymenoptera: Braconidae) are being considered for release in Canada as part of a classical biological control program for Lygus. The attractiveness of different h...
Article
Summary • Accurate identification of natural enemies is the cornerstone of biological control, and methods that can separate closely related species are essential in ecological studies of parasitoids. Conventionally, host rearing and dissection are used to define the ecological host range of candidate biological control agents and assess host-speci...
Article
Lygus spp. Hahn (Hemiptera: Miridae) are serious pests of a wide variety of economically important crops in North America. A European parasitoid, Peristenus digoneutis Loan (Hymenoptera: Braconidae), released in the northeastern USA for the biological control of Lygus, has successfully established in nine states and in eastern Canada, including sou...
Article
The polymerase chain reaction (PCR) revolutionized the field of diagnostics, and today it has routine applications in medical, veterinary, forensic and botanical sciences. The fields of biological control and insect pest management have generally been slow to adopt PCR-based diagnostics in comparison with other fields of science. However, there has...
Article
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Lygus Hahn (Hemiptera: Miridae) are serious pests of agricultural and greenhouse crops throughout North America. In Europe, bivoltine Peristenus Förster (Hymenoptera: Braconidae) species have a significant impact on Lygus populations. Release and establishment of European P. digoneutis Loan in Lygus lineolaris (Palisot de Beauvois) populations in n...
Article
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Species-specific primers for four species of Neofabraea associated with apple and pear fruit diseases were used in multiplex PCR assays to identify 29 putative Neofabraea isolates, primarily isolated from bull's-eye rot on pears from packing houses in Washington and Oregon. Apples were inoculated with these isolates, and tentative identifications b...
Article
Five species of pathogenic fungi belong to Neofabraea. One of these, N. krawtzewii (syn. N. populi), is responsible for bark lesions on poplar (Populus) trees. The other four species cause post-harvest bull's eye rot of pome fruits, and at least two of these also cause bark cankers on pome fruit trees. Morphological variation among these species is...

Citations

... Among the most invasive insects is the brown marmorated stink bug, Halyomorpha halys (Stål, 1855) (Hemiptera: Heteroptera: Pentatomidae), which originates in eastern Asia (China, Korea, Japan, Myanmar, Vietnam, and Taiwan). It is now considered one of the most harmful invasive insect pests in North America and Europe [20][21][22][23][24] and was also recently recorded in Russia [24][25][26]. Native and invasive ranges remain disconnected in Eurasia with a lower diversity of haplotypes in Europe than in Asia [22]. ...
... Although explicit study of these indirect, producer-meditated effects of climate change is so far limited, it is expected to grow in importance. Papers in this collection that concern this broader framework are Schmidt et al. (2021), Huss et al. (2022), andZhang et al. (2022). In addition to these grower-made changes in cropping system, the figure also depicts pest management practices (climate-smart pest management) (Heeb et al. 2019) that minimize feedbacks to the climate system through greenhouse gas emissions. ...
... In Mexico, three wasp species, Triaspis eugenii Wharton and Lopez-Martinez, Urosigalphus sp., and Jaliscoa hunteri (Crawford) account for 96% of all parasitoids that attack the pepper weevil (Rodriguez-Leyva et al. 2007). In Canada, at least seven parasitoid species attack and kill the pepper weevil, including two species, J. hunteri and Pteromalus anthonomi Ashmead, which are also found in Mexico (Labbé et al. 2017). Some work has investigated the potential for J. hunteri to control the pepper weevil in field and greenhouse settings. ...
Reference: Sweet Peppers
... Whether the decrease of population densities or other factors positively affected bug feeding damages cannot be addressed properly. The reasons for the decline of absolute numbers of H. halys recorded in 2020 by active field monitoring can have various causes: established population could be influenced negatively by abiotic factors during overwintering, the quiescence phase, or during reproduction [56] [57] [58]. Moreover, biotic factors such as higher predation or parasitism rates may have already impacted the populations densities [59] [60]. ...
... This will enable researchers to verify the results and predictions of laboratory experiments in field settings, and provide a deeper understanding of the host-specificity testing process. Recently developed molecular diagnostic techniques (Gariepy et al. 2019;Hepler et al. 2020) may be employed to overcome the inability to make direct observations and provide a more comprehensive view of host-parasitoid interactions. ...
... Trissolcus basalis attacked sentinel B. hilaris eggs in Mexico, along with G. aetherium (reported as G. myrmecophilum Ashmead) and Telenomus podisi Ashmead (Scelionidae) (Felipe-Victoriano et al. 2019). Idris elba Talamas (Scelionidae) also emerged from field-collected B. hilaris eggs in soil in Mexico (Lomeli-Flores et al. 2019). How-ever, information about parasitoids attacking B. hilaris eggs is lacking in northcentral California, where most of the cole crops in the US are grown. ...
... the experimental design of Konopka et al. (2017) Adidharma & Ciptadi, 2012;Konopka et al., 2020;Volkoff & Colazza, 1992). As controls, fresh H. halys egg masses (12 eggs/ mass) were offered to T. cultratus (n = 20) and T. japonicus (n = 20) females separately to estimate emergence without competition. ...
... Adventive populations of both species were already observed in Europe (Sabbatini Peverieri et al., 2019;Scaccini et al., 2020a;Stahl et al., 2019aStahl et al., , 2019bZapponi et al., 2021;Zapponi et al., 2020), while only T. japonicus has so far been detected in North America (Talamas et al., 2015). Where introduced, both species are currently expanding their geographic distribution Gariepy and Talamas, 2019;Moraglio et al., 2020;Morrison et al., 2018;Rot et al., 2021;Scaccini et al., 2020a;Tillman et al., 2020;Zapponi et al., 2021). Other egg parasitoids attacking H. halys eggs are species belonging to the genera Anastatus Motschulsky (Hymenoptera: Eupelmidae), Ooencyrtus Ashmead (Hymenoptera: Encyrtidae), and Telenomus Haliday (Hymenoptera: Scelionidae), but parasitism rates for these species are often negligible compared to those of Trissolcus ones (Abram et al., 2017). ...
... They highlighted the importance of specific population of biocontrol agent from genetical evolution process. The use of molecular tools like "genetic test" to screen the potential of "Anastatus bifasciatus Geoffroy" against the agricultural pest (Stahl et al. 2019) can be easily incorporated. The molecular tools can be effectively used to access, incorporate and study the specific host-parasitoid relationship for better understanding of biocontrol agents. ...
... Aphelinus varipes and A. albipodus both belong to the varipes species complex, which includes at least five cryptic species (Gokhman et al. 2017). Species in this species complex are difficult to separate from each other by morphology and by DNA barcodes (Chen et al. 2002;Riddick et al. 2019) which is also reflected in our NJ tree in which both species are mixed (Suppl. material 1: Fig. S1). ...