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The globally invasive weed, mayweed chamomile (Anthemis cotula L.) is an annual, bushy, ill-scented herb, originating in Eurasia. It is aggressively weedy in croplands, field-side ditches, wet areas and along roadsides, especially in slightly acidic, nitrogen-rich, clay-loam soils. In addition to interfering with crop growth, the weed causes dermatitis and eye irritation in humans, skin rashes and sour mouth in domesticated mammals, and off-flavours in cow's milk through forage contamination. Although A. cotula may be managed effectively with some broadleaf herbicides in cereal crops, it is much more difficult to manage in broadleaved crops and cover crops. In some regions, aggressive use of relatively few herbicides has selected for acetolactate synthase herbicide resistance in A. cotula. Therefore, A. cotula poses serious ecological and economic challenges in many regions. Despite this threat, the details of A. cotula biology and ecology in the context of environmental change remain relatively unknown. For example, the reason for the invasiveness of A. cotula remains uncertain, but is presumed to be due to abundant seed production, allelochemicals, mycorrhizal associations, minimal herbivory in invaded ranges, ability to attract generalist pollinators through an extended flowering period and adaptive capacity in a wide range of soil types and conditions. In this paper, we comprehensively review the literature and ongoing work on A. cotula and provide a research agenda to improve understanding and management of this species.
Subodh Adhikari; Ian C. Burke; Sanford D. Eigenbrode. Mayweed chamomile ( Anthemis cotula L.) biology and management—A review of an emerging global invader. Weed Research 2020, 60, 313 -322.
AMA StyleSubodh Adhikari, Ian C. Burke, Sanford D. Eigenbrode. Mayweed chamomile ( Anthemis cotula L.) biology and management—A review of an emerging global invader. Weed Research. 2020; 60 (5):313-322.
Chicago/Turabian StyleSubodh Adhikari; Ian C. Burke; Sanford D. Eigenbrode. 2020. "Mayweed chamomile ( Anthemis cotula L.) biology and management—A review of an emerging global invader." Weed Research 60, no. 5: 313-322.
Determinants of the host ranges of insect herbivores are important from an evolutionary perspective and also have implications for applications such as biological control. Although insect herbivore host ranges typically are phylogenetically constrained, herbivore preference and performance ultimately are determined by plant traits, including plant secondary metabolites. Where such traits are phylogenetically labile, insect hervivore host ranges are expected to be phylogenetically disjunct, reflecting phenotypic similarities rather than genetic relatedness among potential hosts. We tested this hypothesis in the laboratory with a Brassicaceae-specialized weevil, Ceutorhynchus cardariae Korotyaev (Coleoptera: Curculionidae), on 13 test plant species differing in their suitability as hosts for the weevil. We compared the associations between feeding by C. cardariae and either phenotypic similarity (secondary chemistry—glucosinolate profile) or genetic similarity (sequence of the chloroplast gene ndhF) using two methods—simple correlations or strengths of association between feeding by each species, and dendrograms based on either glucosinolates or ndhF sequence (i.e., a phylogram). For comparison, we performed a similar test with the oligophagous Plutella xylostella (L.) (Lepidoptera: Plutellidae) using the same plant species. We found using either method that phenotypic similarity was more strongly associated with feeding intensity by C. cardariae than genetic similarity. In contrast, neither genetic nor phenotypic similarity was significantly associated with feeding intensity on the test species by P. xylostella. The result indicates that phenotypic traits can be more reliable indicators of the feeding preference of a specialist than phylogenetic relatedness of its potential hosts. This has implications for the evolution and maintenance of host ranges and host specialization in phytophagous insects. It also has implications for identifying plant species at risk of nontarget attack by potential weed biological control agents and hence the approach to prerelease testing.
Carole B. Rapo; Urs Schaffner; Sanford D. Eigenbrode; Hariet L. Hinz; William J. Price; Matthew Morra; John Gaskin; Mark Schwarzländer. Feeding intensity of insect herbivores is associated more closely with key metabolite profiles than phylogenetic relatedness of their potential hosts. PeerJ 2019, 7, e8203 .
AMA StyleCarole B. Rapo, Urs Schaffner, Sanford D. Eigenbrode, Hariet L. Hinz, William J. Price, Matthew Morra, John Gaskin, Mark Schwarzländer. Feeding intensity of insect herbivores is associated more closely with key metabolite profiles than phylogenetic relatedness of their potential hosts. PeerJ. 2019; 7 ():e8203.
Chicago/Turabian StyleCarole B. Rapo; Urs Schaffner; Sanford D. Eigenbrode; Hariet L. Hinz; William J. Price; Matthew Morra; John Gaskin; Mark Schwarzländer. 2019. "Feeding intensity of insect herbivores is associated more closely with key metabolite profiles than phylogenetic relatedness of their potential hosts." PeerJ 7, no. : e8203.
Since the introduction of mechanized production in both developed and developing countries, crops and their management have undergone significant adaptation resulting in increased productivity. Historical yield increases in wheat have occurred across most regions of the world (20–88 kg ha−1 year−1), but climate trends threaten to dampen or reverse these gains such that yields are expected to decrease by 5–6% despite rising atmospheric CO2 concentrations. Current and projected climatic factors are temporally and spatially variable in dryland cereal production systems throughout the world. Productivity gains in wheat in some locations have been achieved from traditional agronomic practices and breeding. Continued improvement in all cereal production regions and locations of the world requires technical advances, including closer monitoring of soils, water conservation strategies, and multiple sowing times using different crops to reduce risks. The management of disease, pests, and weeds will be an added challenge, especially in areas of higher precipitation. Excellent progress has been achieved in Asia and there is much potential in Sub-Saharan Africa. Technical solutions seem within our grasp but must be implemented in the context of variable social, economic, regulatory, and administrative constraints, providing opportunities for cross fertilization and global collaboration to meet them.
Garry J. O’Leary; Pramod K. Aggarwal; Daniel F. Calderini; David J. Connor; Peter Craufurd; Sanford D. Eigenbrode; Xue Han; Jerry L. Hatfield. Challenges and Responses to Ongoing and Projected Climate Change for Dryland Cereal Production Systems throughout the World. Agronomy 2018, 8, 34 .
AMA StyleGarry J. O’Leary, Pramod K. Aggarwal, Daniel F. Calderini, David J. Connor, Peter Craufurd, Sanford D. Eigenbrode, Xue Han, Jerry L. Hatfield. Challenges and Responses to Ongoing and Projected Climate Change for Dryland Cereal Production Systems throughout the World. Agronomy. 2018; 8 (4):34.
Chicago/Turabian StyleGarry J. O’Leary; Pramod K. Aggarwal; Daniel F. Calderini; David J. Connor; Peter Craufurd; Sanford D. Eigenbrode; Xue Han; Jerry L. Hatfield. 2018. "Challenges and Responses to Ongoing and Projected Climate Change for Dryland Cereal Production Systems throughout the World." Agronomy 8, no. 4: 34.
The transmission of insect-borne plant pathogens, including viruses, bacteria, phytoplasmas, and fungi depends upon the abundance and behavior of their vectors. These pathogens should therefore be selected to influence their vectors to enhance their transmission, either indirectly, through the infected host plant, or directly, after acquisition of the pathogen by the vector. Accumulating evidence provides partial support for the occurrence of vector manipulation by plant pathogens, especially for plant viruses, for which a theoretical framework can explain patterns in the specific effects on vector behavior and performance depending on their modes of transmission. The variability in effects of pathogens on their vectors, however, suggests inconsistency in the occurrence of vector manipulation but also may reflect incomplete information about these systems. For example, manipulation can occur through combinations of specific effects, including direct and indirect effects on performance and behavior, and dynamics in those effects with disease progression or pathogen acquisition that together constitute syndromes that promote pathogen spread. Deciphering the prevalence and forms of vector manipulation by plant pathogens remains a compelling field of inquiry, but gaps and opportunities to advance it remain. A proposed research agenda includes examining vector manipulation syndromes comprehensively within pathosystems, expanding the taxonomic and genetic breadth of the systems studied, evaluating dynamic effects that occur during disease progression, incorporating the influence of biotic and abiotic environmental factors, evaluating the effectiveness of putative manipulation syndromes under field conditions, deciphering chemical and molecular mechanisms whereby pathogens can influence vectors, expanding the use of evolutionary and epidemiological models, and seeking opportunities to exploit these effects to improve management of insect-borne, economically important plant pathogens. We expect this field to remain vibrant and productive in its own right and as part of wider inquiry concerning host and vector manipulation by plant and animal pathogens and parasites. Expected final online publication date for the Annual Review of Entomology Volume 63 is January 7, 2018. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.
Sanford D. Eigenbrode; Nilsa A. Bosque-Pérez; Thomas S. Davis. Insect-Borne Plant Pathogens and Their Vectors: Ecology, Evolution, and Complex Interactions. Annual Review of Entomology 2018, 63, 169 -191.
AMA StyleSanford D. Eigenbrode, Nilsa A. Bosque-Pérez, Thomas S. Davis. Insect-Borne Plant Pathogens and Their Vectors: Ecology, Evolution, and Complex Interactions. Annual Review of Entomology. 2018; 63 (1):169-191.
Chicago/Turabian StyleSanford D. Eigenbrode; Nilsa A. Bosque-Pérez; Thomas S. Davis. 2018. "Insect-Borne Plant Pathogens and Their Vectors: Ecology, Evolution, and Complex Interactions." Annual Review of Entomology 63, no. 1: 169-191.
Semi-arid cereal systems face challenges worldwide that are driven by ongoing and projected climate change. These challenges include ensuring cropping system resilience and productivity under changing water and temperature regimes while reversing soil degradation, reducing crop susceptibility to pests, pathogens and weed competition, and exploiting genetic resources to develop cultivars with resilience to climate stresses and improved compatibility with cropping system innovations. Meeting these interdependent challenges requires transdisciplinary efforts that integrate knowledge across many scientific domains. The USDA-NIFA-funded coordinated agricultural project, “Regional Approaches to Climate Change for Pacific Northwest Agriculture” (REACCH), employed this transdisciplinary approach to address climate change and sustainability challenges for rain-fed cereal-based systems in the semi-arid intermountain Pacific Northwest. To engage with and contribute to similar efforts globally, REACCH sponsored a workshop “Transitioning Cereal Systems to Adapt to Climate Change” (TCSACC) in November 2015. Participants from 17 countries and five continents with expertise in agronomy, crop physiology, crop modeling, crop protection, breeding and genetics, sociology and economics shared their perspectives, successes, and challenges to achieving transdisciplinary research integration for semi-arid cereal systems under changing climates. Conference goals were to: (1) strengthen the global network of researchers addressing climate change effects on semi-arid cereal-based systems, (2) share the approaches to achieving transdisciplinary collaboration to advance climate change resilience in cereal systems, and (3) identify the elements of a collaborative research agenda that are needed to advance global food security in the twenty-first century. This paper distills the conference themes and summarizes the calls to action that were discussed: Establish coordinated, large scale, transdisciplinary efforts; Consider Genetic × Environment × Management × Social system (G × E × M × S) interactions; Integrate social, economic, and biophysical science, and engineering; Improve integration among knowledge communities; Consider global context of production systems; Develop more inclusive cropping system models; Enable comprehensive data management and data sharing; Include landscape and ecosystem services perspectives; Establish and support existing global collaboration networks.
Sanford D. Eigenbrode; W. Patrick Binns; David R. Huggins. Confronting Climate Change Challenges to Dryland Cereal Production: A Call for Collaborative, Transdisciplinary Research, and Producer Engagement. Frontiers in Ecology and Evolution 2018, 5, 1 .
AMA StyleSanford D. Eigenbrode, W. Patrick Binns, David R. Huggins. Confronting Climate Change Challenges to Dryland Cereal Production: A Call for Collaborative, Transdisciplinary Research, and Producer Engagement. Frontiers in Ecology and Evolution. 2018; 5 ():1.
Chicago/Turabian StyleSanford D. Eigenbrode; W. Patrick Binns; David R. Huggins. 2018. "Confronting Climate Change Challenges to Dryland Cereal Production: A Call for Collaborative, Transdisciplinary Research, and Producer Engagement." Frontiers in Ecology and Evolution 5, no. : 1.
Potato leaf roll virus (PLRV) can reduce tuber yield and quality in potato. Green peach aphid (Myzus persicae [Sulzer]) and potato aphid (Macrosiphum euphorbiae [Thomas]) are the two most important potato-colonizing PLRV vectors in the Pacific Northwest. We compared My. persicae and Ma. euphorbiae densities and PLRV incidences among potato varieties in the field to clarify the relationships between aphid abundance and PLRV incidence in plants. Aphids were sampled weekly over three years in the potato varieties Russet Burbank, Ranger Russet, and Russet Norkotah in a replicated field trial. In all years, My. persicae was more abundant than Ma. euphorbiae, representing at least 97% of samples. My. persicae densities did not differ among potato varieties across years; very low numbers of Ma. euphorbiae precluded such statistical comparisons for this species. PLRV infection did not differ significantly among potato varieties, although the percent of PLRV-infected plants differed among years when all varieties were combined (46% in 2013, 29% in 2011, 13% in 2012). For Ranger Russet and Russet Norkotah, PLRV incidence was positively correlated with aphid abundance as well as proportion of PLRV-positive aphids. In Russet Burbank, only aphid abundance was positively correlated with PLRV infection. Our results suggest that the three most commonly grown potato varieties in our region do not differ in their susceptibility to PLRV infection, and that aphid density was a consistent indicator of the risk of infection by this virus across varieties. Both of these findings can be used to hone PLRV monitoring and modeling efforts.
Shaonpius Mondal; Erik J. Wenninger; Pamela J.S. Hutchinson; Jonathan L. Whitworth; Deepak Shrestha; Sanford D. Eigenbrode; Nilsa A. Bosque-Pérez; William E. Snyder. Responses of Aphid Vectors of Potato leaf roll virus to Potato Varieties. Plant Disease 2017, 101, 1812 -1818.
AMA StyleShaonpius Mondal, Erik J. Wenninger, Pamela J.S. Hutchinson, Jonathan L. Whitworth, Deepak Shrestha, Sanford D. Eigenbrode, Nilsa A. Bosque-Pérez, William E. Snyder. Responses of Aphid Vectors of Potato leaf roll virus to Potato Varieties. Plant Disease. 2017; 101 (10):1812-1818.
Chicago/Turabian StyleShaonpius Mondal; Erik J. Wenninger; Pamela J.S. Hutchinson; Jonathan L. Whitworth; Deepak Shrestha; Sanford D. Eigenbrode; Nilsa A. Bosque-Pérez; William E. Snyder. 2017. "Responses of Aphid Vectors of Potato leaf roll virus to Potato Varieties." Plant Disease 101, no. 10: 1812-1818.
Reliable and consistent monitoring is essential for bee conservation. Correctly interpreting the influence of habitat characteristics on native bee communities is necessary to develop effective strategies for bee conservation and to support the provision of pollination services to agricultural crops or natural plant communities. Biases imposed by different sampling methods used to monitor bee populations can affect our ability to discern important habitat characteristics, but the extent of this bias is not well understood. We used three common sampling methods (blue vane traps, colored pan traps, and aerial net collection) to assess bee communities in fragments of Palouse Prairie in eastern Washington and northern Idaho. We determined differences in abundance, species richness, proportional representation of different genera, and functional trait characteristics among the three sampling techniques. We also evaluated differences in the relationships between bee species richness and diversity and two key habitat variables known to mediate bee populations: local plant species richness and the amount of suitable bee habitat in the surrounding landscape. Community metrics for bees collected using blue vane traps were correlated with the amount of suitable habitat in the landscape but not with plant species richness. Conversely, community metrics for bees collected using an aerial net were correlated with the local plant species richness but not with the amount of suitable habitat. Our results indicate that effective conservation of insect communities will require a combination of sampling methods to reliably discern the influence of habitat variables at different scales and across taxa with varying functional traits.
Paul Rhoades; Terry Griswold; Lisette Waits; Nilsa A. Bosque-Pérez; Christina M. Kennedy; Sanford D. Eigenbrode. Sampling technique affects detection of habitat factors influencing wild bee communities. Journal of Insect Conservation 2017, 21, 703 -714.
AMA StylePaul Rhoades, Terry Griswold, Lisette Waits, Nilsa A. Bosque-Pérez, Christina M. Kennedy, Sanford D. Eigenbrode. Sampling technique affects detection of habitat factors influencing wild bee communities. Journal of Insect Conservation. 2017; 21 (4):703-714.
Chicago/Turabian StylePaul Rhoades; Terry Griswold; Lisette Waits; Nilsa A. Bosque-Pérez; Christina M. Kennedy; Sanford D. Eigenbrode. 2017. "Sampling technique affects detection of habitat factors influencing wild bee communities." Journal of Insect Conservation 21, no. 4: 703-714.
Agricultural intensification is a leading cause of global biodiversity loss, which can reduce the provisioning of ecosystem services in managed ecosystems. Organic farming and plant diversification are farm management schemes that may mitigate potential ecological harm by increasing species richness and boosting related ecosystem services to agroecosystems. What remains unclear is the extent to which farm management schemes affect biodiversity components other than species richness, and whether impacts differ across spatial scales and landscape contexts. Using a global metadataset, we quantified the effects of organic farming and plant diversification on abundance, local diversity (communities within fields), and regional diversity (communities across fields) of arthropod pollinators, predators, herbivores, and detritivores. Both organic farming and higher in‐field plant diversity enhanced arthropod abundance, particularly for rare taxa. This resulted in increased richness but decreased evenness. While these responses were stronger at local relative to regional scales, richness and abundance increased at both scales, and richness on farms embedded in complex relative to simple landscapes. Overall, both organic farming and in‐field plant diversification exerted the strongest effects on pollinators and predators, suggesting these management schemes can facilitate ecosystem service providers without augmenting herbivore (pest) populations. Our results suggest that organic farming and plant diversification promote diverse arthropod metacommunities that may provide temporal and spatial stability of ecosystem service provisioning. Conserving diverse plant and arthropod communities in farming systems therefore requires sustainable practices that operate both within fields and across landscapes.
Elinor M. Lichtenberg; Christina Kennedy; Claire Kremen; Péter Batáry; Frank Berendse; Riccardo Bommarco; Nilsa A. Bosque‐Pérez; Luísa G. Carvalheiro; William E. Snyder; Neal M. Williams; Rachael Winfree; Björn K. Klatt; Sandra Åström; Faye Benjamin; Claire Brittain; Rebecca Chaplin‐Kramer; Yann Clough; Bryan Danforth; Tim Diekötter; Sanford Eigenbrode; Johan Ekroos; Elizabeth Elle; Breno M. Freitas; Yuki Fukuda; Hannah R. Gaines‐Day; Heather Grab; Claudio Gratton; Andrea Holzschuh; Rufus Isaacs; Marco Isaia; Shalene Jha; Dennis Jonason; Vincent P. Jones; Alexandra Klein; Jochen Krauss; Deborah K. Letourneau; Sarina Macfadyen; Rachel E. Mallinger; Emily A. Martin; Eliana Martinez; Jane Memmott; Lora Morandin; Lisa Neame; Mark Otieno; Mia G. Park; Lukas Pfiffner; Michael J. O. Pocock; Carlos Ponce; Simon G. Potts; Katja Poveda; Mariangie Ramos; Jay A. Rosenheim; Maj Rundlöf; Hillary Sardiñas; Manu E. Saunders; Nicole L. Schon; Amber R. Sciligo; C. Sheena Sidhu; Ingolf Steffan‐Dewenter; Teja Tscharntke; Milan Veselý; Wolfgang Weisser; Julianna K. Wilson; David W. Crowder. A global synthesis of the effects of diversified farming systems on arthropod diversity within fields and across agricultural landscapes. Global Change Biology 2017, 23, 4946 -4957.
AMA StyleElinor M. Lichtenberg, Christina Kennedy, Claire Kremen, Péter Batáry, Frank Berendse, Riccardo Bommarco, Nilsa A. Bosque‐Pérez, Luísa G. Carvalheiro, William E. Snyder, Neal M. Williams, Rachael Winfree, Björn K. Klatt, Sandra Åström, Faye Benjamin, Claire Brittain, Rebecca Chaplin‐Kramer, Yann Clough, Bryan Danforth, Tim Diekötter, Sanford Eigenbrode, Johan Ekroos, Elizabeth Elle, Breno M. Freitas, Yuki Fukuda, Hannah R. Gaines‐Day, Heather Grab, Claudio Gratton, Andrea Holzschuh, Rufus Isaacs, Marco Isaia, Shalene Jha, Dennis Jonason, Vincent P. Jones, Alexandra Klein, Jochen Krauss, Deborah K. Letourneau, Sarina Macfadyen, Rachel E. Mallinger, Emily A. Martin, Eliana Martinez, Jane Memmott, Lora Morandin, Lisa Neame, Mark Otieno, Mia G. Park, Lukas Pfiffner, Michael J. O. Pocock, Carlos Ponce, Simon G. Potts, Katja Poveda, Mariangie Ramos, Jay A. Rosenheim, Maj Rundlöf, Hillary Sardiñas, Manu E. Saunders, Nicole L. Schon, Amber R. Sciligo, C. Sheena Sidhu, Ingolf Steffan‐Dewenter, Teja Tscharntke, Milan Veselý, Wolfgang Weisser, Julianna K. Wilson, David W. Crowder. A global synthesis of the effects of diversified farming systems on arthropod diversity within fields and across agricultural landscapes. Global Change Biology. 2017; 23 (11):4946-4957.
Chicago/Turabian StyleElinor M. Lichtenberg; Christina Kennedy; Claire Kremen; Péter Batáry; Frank Berendse; Riccardo Bommarco; Nilsa A. Bosque‐Pérez; Luísa G. Carvalheiro; William E. Snyder; Neal M. Williams; Rachael Winfree; Björn K. Klatt; Sandra Åström; Faye Benjamin; Claire Brittain; Rebecca Chaplin‐Kramer; Yann Clough; Bryan Danforth; Tim Diekötter; Sanford Eigenbrode; Johan Ekroos; Elizabeth Elle; Breno M. Freitas; Yuki Fukuda; Hannah R. Gaines‐Day; Heather Grab; Claudio Gratton; Andrea Holzschuh; Rufus Isaacs; Marco Isaia; Shalene Jha; Dennis Jonason; Vincent P. Jones; Alexandra Klein; Jochen Krauss; Deborah K. Letourneau; Sarina Macfadyen; Rachel E. Mallinger; Emily A. Martin; Eliana Martinez; Jane Memmott; Lora Morandin; Lisa Neame; Mark Otieno; Mia G. Park; Lukas Pfiffner; Michael J. O. Pocock; Carlos Ponce; Simon G. Potts; Katja Poveda; Mariangie Ramos; Jay A. Rosenheim; Maj Rundlöf; Hillary Sardiñas; Manu E. Saunders; Nicole L. Schon; Amber R. Sciligo; C. Sheena Sidhu; Ingolf Steffan‐Dewenter; Teja Tscharntke; Milan Veselý; Wolfgang Weisser; Julianna K. Wilson; David W. Crowder. 2017. "A global synthesis of the effects of diversified farming systems on arthropod diversity within fields and across agricultural landscapes." Global Change Biology 23, no. 11: 4946-4957.
In cereal cropping systems of the Pacific Northwestern United States (PNW), climate change is projected to increase the frequency of drought during summer months, which could increase water stress for crop plants. Yet, it remains uncertain how interactions between herbivore species are affected by drought stress. Here, interactions between two cereal aphids present in PNW cereal systems, Metopolophium festucae (Theobald) subsp. cerealium (a newly invasive species) and Rhopalosiphum padi L. (a naturalized species), were tested relative to wheat water stress. When aphids were confined in leaf cages on wheat, asymmetrical facilitation occurred; per capita fecundity of R. padi was increased by 46% when M. festucae cerealium was also present, compared to when only R. padi was present. Imposed water stress did not influence this interaction. When aphids were confined on whole wheat plants, asymmetrical competition occurred; cocolonization inhibited M. festucae cerealium population growth but did not affect R. padi population growth. Under conditions of plant water stress, however, the inhibitory effect of R. padi on M. festucae cerealium was not observed. We conclude that beneficial effects of cocolonization on R. padi are due to a localized plant response to M. festucae cerealium feeding, and that cocolonization of plants is likely to suppress M. festucae cerealium populations under ample water conditions, but not when plants are water stressed. This suggests that plant responses to water stress alter the outcome of competition between herbivore species, with implications for the structure of pest communities on wheat during periods of drought.
N. E. Foote; T. S. Davis; D. W. Crowder; N. A. Bosque-Pérez; S. D. Eigenbrode. Plant Water Stress Affects Interactions Between an Invasive and a Naturalized Aphid Species on Cereal Crops. Environmental Entomology 2017, 46, 609 -616.
AMA StyleN. E. Foote, T. S. Davis, D. W. Crowder, N. A. Bosque-Pérez, S. D. Eigenbrode. Plant Water Stress Affects Interactions Between an Invasive and a Naturalized Aphid Species on Cereal Crops. Environmental Entomology. 2017; 46 (3):609-616.
Chicago/Turabian StyleN. E. Foote; T. S. Davis; D. W. Crowder; N. A. Bosque-Pérez; S. D. Eigenbrode. 2017. "Plant Water Stress Affects Interactions Between an Invasive and a Naturalized Aphid Species on Cereal Crops." Environmental Entomology 46, no. 3: 609-616.
The long-term sustainability of wheat-based dryland cropping systems in the Inland Pacific Northwest (IPNW) of the United States depends on how these systems adapt to climate change. Climate models project warming with slight increases in winter precipitation but drier summers for the IPNW. These conditions combined with elevated atmospheric CO2, which promote crop growth and improve transpiration-use efficiency, may be beneficial for cropping systems in the IPNW and may provide regional opportunities for agricultural diversification and intensification. Crop modeling simulation under future climatic conditions showed increased wheat productivity for the IPNW for most of the century. Water use by winter wheat was projected to decrease significantly in higher and intermediate precipitation zones and increase slightly in drier locations, but with winter crops utilizing significantly more water overall than spring crops. Crop diversification with inclusion of winter crops other than wheat is a possibility depending on agronomic and economic considerations, while substitution of winter for spring crops appeared feasible only in high precipitation areas. Increased weed pressure, higher pest populations, expanded ranges of biotic stressors, and agronomic, plant breeding, economic, technology, and other factors will influence what production systems eventually prevail under future climatic conditions in the region.
Claudio O. Stöckle; Stewart Higgins; Roger Nelson; John Abatzoglou; Dave Huggins; William Pan; Tina Karimi; John Antle; Sanford Eigenbrode; Erin Brooks. Evaluating opportunities for an increased role of winter crops as adaptation to climate change in dryland cropping systems of the U.S. Inland Pacific Northwest. Climatic Change 2017, 146, 247 -261.
AMA StyleClaudio O. Stöckle, Stewart Higgins, Roger Nelson, John Abatzoglou, Dave Huggins, William Pan, Tina Karimi, John Antle, Sanford Eigenbrode, Erin Brooks. Evaluating opportunities for an increased role of winter crops as adaptation to climate change in dryland cropping systems of the U.S. Inland Pacific Northwest. Climatic Change. 2017; 146 (1-2):247-261.
Chicago/Turabian StyleClaudio O. Stöckle; Stewart Higgins; Roger Nelson; John Abatzoglou; Dave Huggins; William Pan; Tina Karimi; John Antle; Sanford Eigenbrode; Erin Brooks. 2017. "Evaluating opportunities for an increased role of winter crops as adaptation to climate change in dryland cropping systems of the U.S. Inland Pacific Northwest." Climatic Change 146, no. 1-2: 247-261.
While synoptic collections provide data on the range and general composition of the North American bee fauna, bee communities associated with specific habitats are largely uncharacterized. This report describes the community of native bees currently found in remnant fragments of the Palouse Prairie of northern Idaho and southeastern Washington State. Native bees were collected using standardized collection techniques including blue vane traps, colored pan traps and aerial netting. More than 13,000 individuals were collected, representing at least 174 species and 36 morphospecies in 29 genera. These data provide the most thorough characterization of the bee fauna of this vulnerable ecosystem, as well as community level information on bee species of unknown conservation status. These results are relevant to regional conservation efforts and, more broadly, are representative of conditions in fragmented grasslands surrounded by intense agriculture, a common global land use pattern of conservation concern.
Paul R Rhoades; Terry Griswold; Harold Ikerd; Lisette Waits; Nilsa Bosque-Pérez; Sanford Eigenbrode. The native bee fauna of the Palouse Prairie (Hymenoptera: Apoidea). Journal of Melittology 2017, 1 -20.
AMA StylePaul R Rhoades, Terry Griswold, Harold Ikerd, Lisette Waits, Nilsa Bosque-Pérez, Sanford Eigenbrode. The native bee fauna of the Palouse Prairie (Hymenoptera: Apoidea). Journal of Melittology. 2017; (66):1-20.
Chicago/Turabian StylePaul R Rhoades; Terry Griswold; Harold Ikerd; Lisette Waits; Nilsa Bosque-Pérez; Sanford Eigenbrode. 2017. "The native bee fauna of the Palouse Prairie (Hymenoptera: Apoidea)." Journal of Melittology , no. 66: 1-20.
There has been a recent shift in the prevalence of Potato virus Y (PVY) strains affecting potato with the ordinary strain PVYO declining and the recombinant strains PVYNTN and PVYN:O emerging in the United States. Multiple PVY strains are commonly found in potato fields and even in individual plants. Factors contributing to the emergence of the recombinant strains are not well defined but differential aphid transmission of strains from single and mixed infections may play a role. We found that the transmission efficiencies by Myzus persicae, the green peach aphid, of PVYNTN, PVYN:O, and PVYO varied depending on the potato cultivar serving as the virus source. Overall transmission efficiency was highest from sources infected with three virus strains, whereas transmission from sources infected with one or two virus strains was not significantly different. Two strains were concomitantly transmitted by individual aphids from many of the mixed-source combinations, especially if PVYO was present. Triple-strain infections were not transmitted by any single aphid. PVYO was transmitted most efficiently from mixed-strain infection sources. The data do not support the hypothesis that differential transmission of PVY strains by M. persicae is a major contributing factor in the emergence of recombinant PVY strains in the U.S. potato crop.
Shaonpius Mondal; Yu-Hsuan Lin; Juliet E. Carroll; Erik J. Wenninger; Nilsa A. Bosque-Pérez; Jonathan L. Whitworth; Pamela Hutchinson; Sanford Eigenbrode; Stewart M. Gray. Potato virus Y Transmission Efficiency from Potato Infected with Single or Multiple Virus Strains. Phytopathology® 2017, 107, 491 -498.
AMA StyleShaonpius Mondal, Yu-Hsuan Lin, Juliet E. Carroll, Erik J. Wenninger, Nilsa A. Bosque-Pérez, Jonathan L. Whitworth, Pamela Hutchinson, Sanford Eigenbrode, Stewart M. Gray. Potato virus Y Transmission Efficiency from Potato Infected with Single or Multiple Virus Strains. Phytopathology®. 2017; 107 (4):491-498.
Chicago/Turabian StyleShaonpius Mondal; Yu-Hsuan Lin; Juliet E. Carroll; Erik J. Wenninger; Nilsa A. Bosque-Pérez; Jonathan L. Whitworth; Pamela Hutchinson; Sanford Eigenbrode; Stewart M. Gray. 2017. "Potato virus Y Transmission Efficiency from Potato Infected with Single or Multiple Virus Strains." Phytopathology® 107, no. 4: 491-498.
Intraspecific specialization by insect herbivores on different host plant species contributes to the formation of genetically distinct “host races,” but the effects of plant virus infection on interactions between specialized herbivores and their host plants have barely been investigated. Using three genetically and phenotypically divergent pea aphid clones (Acyrthosiphon pisum L.) adapted to either pea (Pisum sativum L.) or alfalfa (Medicago sativa L.), we tested how infection of these hosts by an insect-borne phytovirus (Bean leafroll virus; BLRV) affects aphid performance and preference. Four important findings emerged: 1) mean aphid survival rate and intrinsic rate of population growth (Rm) were increased by 15% and 14%, respectively, for aphids feeding on plants infected with BLRV; 2) 34% of variance in survival rate was attributable to clone × host plant interactions; 3) a three-way aphid clone × host plant species × virus treatment significantly affected intrinsic rates of population growth; and 4) each clone exhibited a preference for either pea or alfalfa when choosing between noninfected host plants, but for two of the three clones tested these preferences were modestly reduced when selecting among virus-infected host plants. Our studies show that colonizing BLRV-infected hosts increased A. pisum survival and rates of population growth, confirming that the virus benefits A. pisum. BLRV transmission affected aphid discrimination of host plant species in a genotype-specific fashion, and we detected three unique “virus-association phenotypes,” with potential consequences for patterns of host plant use by aphid populations and crop virus epidemiology.
T. S. Davis; Y. Wu; S. D. Eigenbrode. The Effects ofBean Leafroll Viruson Life History Traits and Host Selection Behavior of Specialized Pea Aphid (Acyrthosiphon pisum, Hemiptera: Aphididae) Genotypes. Environmental Entomology 2017, 46, 68 -74.
AMA StyleT. S. Davis, Y. Wu, S. D. Eigenbrode. The Effects ofBean Leafroll Viruson Life History Traits and Host Selection Behavior of Specialized Pea Aphid (Acyrthosiphon pisum, Hemiptera: Aphididae) Genotypes. Environmental Entomology. 2017; 46 (1):68-74.
Chicago/Turabian StyleT. S. Davis; Y. Wu; S. D. Eigenbrode. 2017. "The Effects ofBean Leafroll Viruson Life History Traits and Host Selection Behavior of Specialized Pea Aphid (Acyrthosiphon pisum, Hemiptera: Aphididae) Genotypes." Environmental Entomology 46, no. 1: 68-74.
Male-biased aggregations of sugar beet root maggot, Tetanops myopaeformis (Röder) (Diptera: Ulidiidae), flies were observed on utility poles near sugar beet (Beta vulgaris L. [Chenopodiaceae]) fields in southern Idaho; this contrasts with the approximately equal sex ratio typically observed within fields. Peak observation of mating pairs coincided with peak diurnal abundance of flies. Volatiles released by individual male and female flies were sampled from 08:00 to 24:00 hours in the laboratory using solid-phase microextraction and analyzed using gas chromatography/mass spectrometry (GC/MS). Eleven compounds were uniquely detected from males. Three of these compounds (2-undecanol, 2-decanol, and sec-nonyl acetate) were detected in greater quantities during 12:00–24:00 hours than during 08:00–12:00 hours. The remaining eight compounds uniquely detected from males did not exhibit temporal trends in release. Both sexes produced 2-nonanol, but males produced substantially higher (ca. 80-fold) concentrations of this compound than females, again peaking after 12:00 hours. The temporal synchrony among male aggregation behavior, peak mating rates, and release of certain volatile compounds by males suggest that T. myopaeformis flies exhibit lekking behavior and produce an associated pheromone. Field assays using synthetic blends of the putative aggregation pheromone showed evidence of attraction in both females and males.
Erik J. Wenninger; Susan Y. Emmert; Kelly Tindall; Hongjian Ding; Mark A. Boetel; D. Rajabaskar; Sanford D. Eigenbrode. Aggregation Behavior and a Putative Aggregation Pheromone in Sugar Beet Root Maggot Flies (Diptera: Ulidiidae). Journal of Insect Science 2017, 17, 1 .
AMA StyleErik J. Wenninger, Susan Y. Emmert, Kelly Tindall, Hongjian Ding, Mark A. Boetel, D. Rajabaskar, Sanford D. Eigenbrode. Aggregation Behavior and a Putative Aggregation Pheromone in Sugar Beet Root Maggot Flies (Diptera: Ulidiidae). Journal of Insect Science. 2017; 17 (1):1.
Chicago/Turabian StyleErik J. Wenninger; Susan Y. Emmert; Kelly Tindall; Hongjian Ding; Mark A. Boetel; D. Rajabaskar; Sanford D. Eigenbrode. 2017. "Aggregation Behavior and a Putative Aggregation Pheromone in Sugar Beet Root Maggot Flies (Diptera: Ulidiidae)." Journal of Insect Science 17, no. 1: 1.
Potato virus Y (PVY) is a major concern for potato production in the United States given its impact on both crop quality and yield. Although green peach aphid, Myzus persicae (Sulzer), is the most efficient PVY vector, it may be less abundant in potato-growing areas of Idaho relative to non-potato-colonizing aphid vectors of PVY that may disperse from nearby cereal fields and other crops. A field study was conducted during 2012–2013 to examine if noncolonizing aphids disperse to nearby potato fields as cereal crops dry down before harvest. The aphid fauna was sampled weekly in four different potato fields in south-central and southeastern Idaho using yellow sticky traps and yellow pan traps. Potato fields were chosen with an adjacent cereal field such that the prevailing westerly wind would facilitate aphid dispersal from cereal fields to potato. Non-potato-colonizing aphids sampled included 10 cereal aphid species, the most abundant of which were Rhopalosiphum padi L. and Metopolophium dirhodum (Walker). More than 35 species from noncereal hosts also were found. Overall, green peach aphid abundance was relatively low, ranging from 0.5–2.5% of the total aphid capture between years and among fields. In both years and all locations, cereal aphid abundance peaked in mid- to late July (cereal ripening stage) and decreased thereafter as cereal crops dried. PVY prevalence in the potato fields increased following these increases in aphid abundance. This study suggests that cereal aphids and other noncolonizing aphids are important contributors to PVY prevalence in potato in southern Idaho.
Shaonpius Mondal; Erik J. Wenninger; Pamela J. S. Hutchinson; Monica A. Weibe; Sanford D. Eigenbrode; Nilsa A. Bosque-Pérez. Contribution of Noncolonizing Aphids toPotato Virus YPrevalence in Potato in Idaho. Environmental Entomology 2016, 45, 1445 -1462.
AMA StyleShaonpius Mondal, Erik J. Wenninger, Pamela J. S. Hutchinson, Monica A. Weibe, Sanford D. Eigenbrode, Nilsa A. Bosque-Pérez. Contribution of Noncolonizing Aphids toPotato Virus YPrevalence in Potato in Idaho. Environmental Entomology. 2016; 45 (6):1445-1462.
Chicago/Turabian StyleShaonpius Mondal; Erik J. Wenninger; Pamela J. S. Hutchinson; Monica A. Weibe; Sanford D. Eigenbrode; Nilsa A. Bosque-Pérez. 2016. "Contribution of Noncolonizing Aphids toPotato Virus YPrevalence in Potato in Idaho." Environmental Entomology 45, no. 6: 1445-1462.
Joyce Parker; David W. Crowder; Sanford Eigenbrode; William Snyder. Trap crop diversity enhances crop yield. Agriculture, Ecosystems & Environment 2016, 232, 254 -262.
AMA StyleJoyce Parker, David W. Crowder, Sanford Eigenbrode, William Snyder. Trap crop diversity enhances crop yield. Agriculture, Ecosystems & Environment. 2016; 232 ():254-262.
Chicago/Turabian StyleJoyce Parker; David W. Crowder; Sanford Eigenbrode; William Snyder. 2016. "Trap crop diversity enhances crop yield." Agriculture, Ecosystems & Environment 232, no. : 254-262.
Sanford D. Eigenbrode; Thomas S. Davis; Jennifer R. Adams; Damon S. Husebye; Lisette Waits; David Hawthorne. Host‐adapted aphid populations differ in their migratory patterns and capacity to colonize crops. Journal of Applied Ecology 2016, 53, 1382 -1390.
AMA StyleSanford D. Eigenbrode, Thomas S. Davis, Jennifer R. Adams, Damon S. Husebye, Lisette Waits, David Hawthorne. Host‐adapted aphid populations differ in their migratory patterns and capacity to colonize crops. Journal of Applied Ecology. 2016; 53 (5):1382-1390.
Chicago/Turabian StyleSanford D. Eigenbrode; Thomas S. Davis; Jennifer R. Adams; Damon S. Husebye; Lisette Waits; David Hawthorne. 2016. "Host‐adapted aphid populations differ in their migratory patterns and capacity to colonize crops." Journal of Applied Ecology 53, no. 5: 1382-1390.
Interdisciplinarity is crucial for addressing the complex problems society faces. We present a model for educating doctoral students for careers involving interdisciplinary, team-based research to address problem-focused questions. The educational model is theoretically based and evaluated in light of the literature, faculty perspectives, and an assessment by students of educational successes and challenges they experienced. The educational model involves (a) the identification of integrated research questions combining team members’ disciplines, (b) course work to review theoretical underpinnings of interdisciplinarity and to develop integrated research proposals to address the questions, (c) meetings and workshops to enhance team cohesiveness, (d) engagement with stakeholders, and (e) interdisciplinary team research that yields joint dissertation chapters and publications. The model achieved a high level of integration among students. This model addresses the widely acknowledged need to impart interdisciplinary research and team membership skills as part of graduate education.
Nilsa A. Bosque-Pérez; P. Zion Klos; Jo Ellen Force; Lisette Waits; Kate Cleary; Paul Rhoades; Sara M. Galbraith; Amanda L. Bentley Brymer; Michael O'Rourke; Sanford Eigenbrode; Bryan Finegan; J.D. Wulfhorst; Nicole Sibelet; Joseph D. Holbrook. A Pedagogical Model for Team-Based, Problem-Focused Interdisciplinary Doctoral Education. BioScience 2016, 66, 477 -488.
AMA StyleNilsa A. Bosque-Pérez, P. Zion Klos, Jo Ellen Force, Lisette Waits, Kate Cleary, Paul Rhoades, Sara M. Galbraith, Amanda L. Bentley Brymer, Michael O'Rourke, Sanford Eigenbrode, Bryan Finegan, J.D. Wulfhorst, Nicole Sibelet, Joseph D. Holbrook. A Pedagogical Model for Team-Based, Problem-Focused Interdisciplinary Doctoral Education. BioScience. 2016; 66 (6):477-488.
Chicago/Turabian StyleNilsa A. Bosque-Pérez; P. Zion Klos; Jo Ellen Force; Lisette Waits; Kate Cleary; Paul Rhoades; Sara M. Galbraith; Amanda L. Bentley Brymer; Michael O'Rourke; Sanford Eigenbrode; Bryan Finegan; J.D. Wulfhorst; Nicole Sibelet; Joseph D. Holbrook. 2016. "A Pedagogical Model for Team-Based, Problem-Focused Interdisciplinary Doctoral Education." BioScience 66, no. 6: 477-488.
Interactions between an invasive aphid, Metopolophium festucae (Theobald) subsp. cerealium, and Barley yellow dwarf virus (BYDV-PAV) were studied under laboratory conditions. M. festucae cerealium is an economic pest of wheat and barley that has recently been found in high population densities in wheat in the Pacific Northwest of the United States. BYDV-PAV is the most prevalent and injurious species of BYDV worldwide and in the Pacific Northwest. Although M. festucae sensu stricto (Theobald 1917) has been reported previously as a vector of some BYDV isolates, there is no confirmed transmission of BYDV by M. festucae cerealium. Two experiments examined the ability of M. festucae cerealium to transmit BYDV-PAV. The first used single aphids caged to indicator plants of a BYDV-susceptible winter wheat cultivar and the second used multiple aphids on each test plant. M. festucae cerealium did not transmit BYDV-PAV in either experiment, whereas transmission by a known BYDV vector, Rhopalosiphum padi L., was consistently high (≥93%). A third experiment compared the intrinsic growth rate, days until first reproduction and daily reproduction by M. festucae cerealium on sham-inoculated and BYDV-PAV-infected wheat, but detected no differences. The findings are reviewed in light published data on M. festucae species, BYDV transmission, and the potential pest status of this new invading aphid.
S. E. Sadeghi; J. Bjur; L. Ingwell; L. Unger; N. A. Bosque-Pérez; Sanford Eigenbrode. Interactions betweenMetopolophium festucae cerealium(Hemiptera: Aphididae) andBarley yellow dwarf virus(BYDV-PAV). Journal of Insect Science 2016, 16, 21 .
AMA StyleS. E. Sadeghi, J. Bjur, L. Ingwell, L. Unger, N. A. Bosque-Pérez, Sanford Eigenbrode. Interactions betweenMetopolophium festucae cerealium(Hemiptera: Aphididae) andBarley yellow dwarf virus(BYDV-PAV). Journal of Insect Science. 2016; 16 (1):21.
Chicago/Turabian StyleS. E. Sadeghi; J. Bjur; L. Ingwell; L. Unger; N. A. Bosque-Pérez; Sanford Eigenbrode. 2016. "Interactions betweenMetopolophium festucae cerealium(Hemiptera: Aphididae) andBarley yellow dwarf virus(BYDV-PAV)." Journal of Insect Science 16, no. 1: 21.
Potato virus Y (PVY) strains are transmitted by different aphid species in a non-persistent, non-circulative manner. Green peach aphid (GPA), Myzus persicae Sulzer, is the most efficient vector in laboratory studies, but potato aphid (PA), Macrosiphum euphorbiae Thomas (both Hemiptera: Aphididae, Macrosiphini), and bird cherry-oat aphid (BCOA), Rhopalosiphum padi L. (Hemiptera: Aphididae, Aphidini), also contribute to PVY transmission. Studies were conducted with GPA, PA, and BCOA to assess PVY transmission efficiency for various isolates of the same strain. Treatments included three PVY strains (PVYO, PVYN:O, PVYNTN) and two isolates of each strain (Oz and NY090031 for PVYO; Alt and NY090004 for PVYN:O; N4 and NY090029 for PVYNTN), using each of three aphid species as well as a sham inoculation. Virus-free tissue-cultured plantlets of potato cv. Russet Burbank were used as virus source and recipient plants. Five weeks post inoculation, recipient plants were tested with quantitative DAS-ELISA to assess infection percentage and virus titer. ELISA-positive recipient plants were assayed with RT-PCR to confirm presence of the expected strains. Transmission efficiency (percentage infection of plants) was highest for GPA, intermediate for BCOA, and lowest for PA. For all aphid species, transmission efficiency did not differ significantly between isolates within each strain. No correlations were found among source plant titer, infection percentage, and recipient plant titer. For both GPA and BCOA, isolates of PVYNTN were transmitted with greatest efficiency followed by isolates of PVYO and PVYN:O, which might help explain the increasing prevalence of necrotic strains in potato-growing regions. Bird cherry-oat aphid transmitted PVY with higher efficiency than previously reported, suggesting that this species is more important to PVY epidemiology than has been considered.
Shaonpius Mondal; Erik J. Wenninger; Pamela J.S. Hutchinson; Jonathan L. Whitworth; Deepak Shrestha; Sanford Eigenbrode; Nilsa A. Bosque-Pérez. Comparison of transmission efficiency of various isolates ofPotato virus Yamong three aphid vectors. Entomologia Experimentalis et Applicata 2016, 158, 258 -268.
AMA StyleShaonpius Mondal, Erik J. Wenninger, Pamela J.S. Hutchinson, Jonathan L. Whitworth, Deepak Shrestha, Sanford Eigenbrode, Nilsa A. Bosque-Pérez. Comparison of transmission efficiency of various isolates ofPotato virus Yamong three aphid vectors. Entomologia Experimentalis et Applicata. 2016; 158 (3):258-268.
Chicago/Turabian StyleShaonpius Mondal; Erik J. Wenninger; Pamela J.S. Hutchinson; Jonathan L. Whitworth; Deepak Shrestha; Sanford Eigenbrode; Nilsa A. Bosque-Pérez. 2016. "Comparison of transmission efficiency of various isolates ofPotato virus Yamong three aphid vectors." Entomologia Experimentalis et Applicata 158, no. 3: 258-268.