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Cervidins A-D: Novel Glycine Conjugated Fatty Acids from the Tarsal Gland of Male Whitetail Deer, Odocoileus virginianus J. Chem. Ecol. (IF 2.117) Pub Date : 2021-02-24 Ke Li, Michael J. Siefkes, Weiming Li
Sexually mature male deer are known to rub-urinate, a process where urine is deposited on the tarsal gland. The resulting mixture of compounds from urine and secretions from the tarsal gland are used to signal sex, age, maturation status, and other information at close distance. We examined the difference in metabolites of tarsal gland extracts from male and female whitetail deer, Odocoileus virginianus
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Chemically-mediated colonization of black cherry by the peach bark beetle, Phloeotribus liminaris J. Chem. Ecol. (IF 2.117) Pub Date : 2021-02-22 Matthew W. Ethington, Gabriel P. Hughes, Nicole R. VanDerLaan, Matthew D. Ginzel
The peach bark beetle (Phloeotribus liminaris Harris, PBB) affects the health, quality, and value of black cherry (Prunus serotina Ehrh.) within the Central Hardwoods Forest Region of North America. When colonized by adult beetles, black cherry trees produce a defensive exudate, or ‘gum’, staining the wood and decreasing its value up to 90%. Current management tactics are inadequate to avoid extensive
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Limoniic Acid - Major Component of the Sex Pheromones of the Click Beetles Limonius canus and L. californicus J. Chem. Ecol. (IF 2.117) Pub Date : 2021-02-19 Regine Gries, Santosh K. Alamsetti, Willem G. van Herk, Haley A. Catton, Scott Meers, Emily Lemke, Gerhard Gries
Wireworms, the larvae of click beetles (Coleoptera: Elateridae), are soil-dwelling insect pests inflicting major economic damage on many types of agricultural crops worldwide. The objective of this work was to identify the female-produced sex pheromones of the Pacific Coast wireworm, Limonius canus LeConte, and the sugarbeet wireworm, L. californicus (Mannerheim) (Coleoptera: Elateridae). Headspace
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Predator Performance and Fitness Is Dictated by Herbivore Prey Type Plus Indirect Effects of their Host Plant J. Chem. Ecol. (IF 2.117) Pub Date : 2021-02-02 Todd A. Ugine, Harsimran K. Gill, Nicolo Hernandez, Robert J. Grebenok, Spencer T. Behmer, John E. Losey
Animals, including herbivores and predators, use diet-mixing to balance their macro- and micronutrient intake. Recent work demonstrated that lady beetles fed only pea aphids from fava beans had reduced fitness caused by a deficiency of dietary sterols. However, beetles redressed this deficit by eating fava bean leaves. In the current study we used Coccinella septempunctata as a model to test the hypotheses
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Effect of Leaf Maturity on Host Habitat Location by the Egg-Larval Parasitoid Ascogaster reticulata J. Chem. Ecol. (IF 2.117) Pub Date : 2021-02-01 Suguru Komatsuzaki, Narisara Piyasaengthong, Shigeru Matsuyama, Yooichi Kainoh
Adoxophyes honmai, a serious pest of tea plants, prefers to lay eggs on mature tea leaves rather than young leaves. Here, we examined a hypothesis that Ascogaster reticulata, an egg-larval parasitoid of A. honmai, increases the likelihood of encountering host egg masses by searching mature tea leaves when host-derived cues are not available. In a dual-choice bioassay using a four-arm olfactometer,
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Multiple Attack to Inflorescences of an Annual Plant Does Not Interfere with the Attraction of Parasitoids and Pollinators J. Chem. Ecol. (IF 2.117) Pub Date : 2021-01-28 Lucille T. S. Chrétien, Hessel van der Heide, Liana O. Greenberg, David Giron, Marcel Dicke, Dani Lucas-Barbosa
Plants in the flowering stage need to ensure reproduction by protecting themselves from attack and by preserving interactions with mutualist pollinators. When different plant mutualists are using the same type of cues, such as volatile compounds, attraction of parasitoids and pollinators may trade off. To explore this, we compared volatile emission of Brassica nigra plants in response to single or
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Bioactive Male-Produced Volatiles from Anastrepha obliqua and their Role in Attraction of Conspecific Females J. Chem. Ecol. (IF 2.117) Pub Date : 2021-01-21 Nathaly C. De Aquino, Luana L. Ferreira, Raphael Tavares, Claudinete S. Silva, Adriana Mendonça, Iara Sordi Joachim-Bravo, Paulo Milet-Pinheiro, Daniela Navarro, Fabiane C. De Abreu Galdino, Ruth R. Do Nascimento
The study of insect semiochemicals, especially pheromones, is of fundamental importance for the development of strategies for controlling agricultural pests. In this study, volatile compounds involved in the communication between males and females of the fruit fly, Anastrepha obliqua (Diptera: Tephritidae), for mating purposes were characterized to develop attractant formulations for females of this
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Anti-Herbivore Activity of Oregonin, a Diarylheptanoid Found in Leaves and Bark of Red Alder ( Alnus rubra ) J. Chem. Ecol. (IF 2.117) Pub Date : 2021-01-21 Carmen S. Lea, Stephen G. Bradbury, C. Peter Constabel
Plants synthesize a wide range of bioactive secondary metabolites to defend against pests and pathogens. Red alder (Alnus rubra) bark, root, and leaf extract have a long history of use in traditional medicine and hygiene. Diarylheptanoids, especially oregonin ((5S)-1,7-bis(3,4-dihydroxyphenyl)-5-(β-D-xylopyranosyloxy)-heptan-3-one), have been identified as major bioactive constituents. Diarylheptanoids
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The Scent of Life: Phoretic Nematodes Use Wasp Volatiles and Carbon Dioxide to Choose Functional Vehicles for Dispersal J. Chem. Ecol. (IF 2.117) Pub Date : 2021-01-21 Satyajeet Gupta, Anusha L. K. Kumble, Kaveri Dey, Jean-Marie Bessière, Renee M. Borges
Hitchhikers (phoretic organisms) need vehicles to disperse out of unsuitable habitats. Therefore, finding vehicles with the right functional attributes is essential for phoretic organisms. To locate these vehicles, phoretic organisms employ cues within modalities, ranging from visual to chemical senses. However, how hitchhikers discriminate between individual vehicles has rarely been investigated.
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Transcriptomics Reveal the Survival Strategies of Enterococcus mundtii in the Gut of Spodoptera littoralis J. Chem. Ecol. (IF 2.117) Pub Date : 2021-01-18 Tilottama Mazumdar, Beng Soon Teh, Aishwarya Murali, Wolfgang Schmidt-Heck, Yvonne Schlenker, Heiko Vogel, Wilhelm Boland
The complex interaction between a higher organism and its resident gut flora is a subject of immense interest in the field of symbiosis. Many insects harbor a complex community of microorganisms in their gut. Larvae of Spodoptera littoralis, a lepidopteran pest, house a bacterial community that varies both spatially (along the length of the gut) and temporally (during the insect’s life cycle). To monitor
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Desorption Temperature, Solid-Phase Microextraction (SPME), and Natural Product Analyses, how Low Can we Go? J. Chem. Ecol. (IF 2.117) Pub Date : 2021-01-18 Alexander M. Gaffke, Hans T. Alborn
Solid phase microextraction (SPME) has become a common technique for volatile sampling due to its ease of use and limited technical requirements. The solvent-free nature of SPME is also exceptionally attractive for gas chromatography mass spectrometry (GC/MS) analysis. To ensure efficient transfer of the sample to the GC, the manufacturer recommend injector desorption temperatures in the range of 200
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Few Sensory Cues Differentiate Host and Dead-End Trap Plant for the Sugarcane Spotted Borer Chilo sacchariphagus (Lepidoptera: Crambidae) J. Chem. Ecol. (IF 2.117) Pub Date : 2021-01-16 Vincent Jacob, Richard Tibère, Samuel Nibouche
The use of Erianthus arundinaceus as a trap plant in association with sugarcane reduces populations of the spotted sugarcane stalk borer Chilo sacchariphagus (Bojer) (Lepidoptera: Crambidae). This grass acts as a dead-end trap crop because it is the preferred plant for oviposition relative to sugarcane, and it precludes larval development. We explored the chemical mechanisms involved in host choice
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The Role of Trialeurodes vaporariorum -Infested Tomato Plant Volatiles in the Attraction of Encarsia formosa (Hymenoptera: Aphelinidae) J. Chem. Ecol. (IF 2.117) Pub Date : 2021-01-16 Pascal M. Ayelo, Abdullahi A. Yusuf, Christian W. W. Pirk, Samira A. Mohamed, Anaїs Chailleux, Emilie Deletre
Natural enemies locate their herbivorous host and prey through kairomones emitted by host plants and herbivores. These kairomones could be exploited to attract and retain natural enemies in crop fields for insect pest control. The parasitoid Encarsia formosa preferentially parasitises its whitefly host, Trialeurodes vaporariorum, a major pest of tomato Solanum lycopersicum, thus offering an effective
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Glandular Trichome-Derived Mono- and Sesquiterpenes of Tomato Have Contrasting Roles in the Interaction with the Potato Aphid Macrosiphum euphorbiae J. Chem. Ecol. (IF 2.117) Pub Date : 2021-01-14 Fumin Wang, Yong-Lak Park, Michael Gutensohn
Secondary metabolites produced in glandular trichomes of tomato are involved in interactions with herbivores. In cultivated tomato (Solanum lycopersicum) glandular trichomes accumulate a blend of abundant monoterpenes and smaller amounts of a few sesquiterpenes. These mono- and sesquiterpenes are synthesized by three terpene synthases, TPS20 as well as TPS9 and TPS12, respectively. To study effects
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Volatile and Semi-Volatile Organic Compounds May Help Reduce Pollinator-Prey Overlap in the Carnivorous Plant Drosophyllum lusitanicum (Drosophyllaceae) J. Chem. Ecol. (IF 2.117) Pub Date : 2021-01-08 Fernando Ojeda, Ceferino Carrera, Maria Paniw, Luis García-Moreno, Gerardo F. Barbero, Miguel Palma
Most carnivorous plants show a conspicuous separation between flowers and leaf-traps, which has been interpreted as an adaptive response to minimize pollinator-prey conflicts which will reduce fitness. Here, we used the carnivorous subshrub Drosophyllum lusitanicum (Drosophyllaceae) to explore if and how carnivorous plants with minimal physical separation of flower and trap avoid or reduce a likely
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Evidence for Semiochemical Divergence Between Sibling Bark Beetle Species: Dendroctonus brevicomis and Dendroctonus barberi J. Chem. Ecol. (IF 2.117) Pub Date : 2021-01-06 Brian T. Sullivan, Amanda M. Grady, Richard W. Hofstetter, Deepa S. Pureswaran, Cavell Brownie, Daniel Cluck, Tom W. Coleman, Andrew Graves, Elizabeth Willhite, Lia Spiegel, Dwight Scarbrough, Andrew Orlemann, Gerardo Zúñiga
We investigated geographic variation in the semiochemistry of major disturbance agents of western North American pine forests, Dendroctonus brevicomis Le Conte and Dendroctonus barberi Hopkins (Coleoptera: Curculionidae: Scolytinae), species separated by the Great Basin in the USA that until recently were synonymous. At 15 sites in the western USA and northern Mexico, beetle populations were examined
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Deployment of Aggregation-Sex Pheromones of Longhorned Beetles (Coleoptera: Cerambycidae) Facilitates the Discovery and Identification of their Parasitoids J. Chem. Ecol. (IF 2.117) Pub Date : 2021-01-06 Todd D. Johnson, Matthew L. Buffington, Michael W. Gates, Robert R. Kula, Elijah Talamas
Longhorned beetles (Coleoptera: Cerambycidae) include many species that are among the most damaging pests of managed and natural forest ecosystems worldwide. Many species of cerambycids use volatile chemical signals (i.e., pheromones) to locate mates. Pheromones are often used by natural enemies, including parasitoids, to locate hosts and therefore can be useful tools for identifying host-parasitoid
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Plant Volatiles Modulate Seasonal Dynamics between Hosts of the Polyphagous Mirid Bug Apolygus lucorum J. Chem. Ecol. (IF 2.117) Pub Date : 2021-01-06 Hong-Sheng Pan, Chun-Li Xiu, Livy Williams, Yan-Hui Lu
Plant-derived volatiles play a significant role in host selection of phytophagous insects, but their role in seasonal host shifts remain unclear. The polyphagous mirid bug Apolygus lucorum displays marked seasonal host alternation. During summer, volatiles from flowering plants play a key role in A. lucorum foraging. Though A. lucorum adults deposit overwintering eggs on jujube (Ziziphus jujuba) and
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Chemical Species Recognition in a Tetragnatha Spider (Araneae: Tetragnathidae) J. Chem. Ecol. (IF 2.117) Pub Date : 2021-01-04 Seira A. Adams, Moritz Gerbaulet, Stefan Schulz, Rosemary G. Gillespie, Gabriele Uhl
Much of our knowledge regarding the role of chemicals in species recognition in arthropods is based on a few taxonomic groups, predominantly insect pest species. To investigate the chemical underpinnings of species recognition cues in other arthropods, we conducted mate choice experiments and analyzed the chemical profiles of two species in the long-jawed spider genus Tetragnatha from allopatric populations
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Induction and Priming of Plant Defense by Root-Associated Insect-Pathogenic Fungi J. Chem. Ecol. (IF 2.117) Pub Date : 2020-11-12 Joana Carvalho Cachapa, Nicolai Vitt Meyling, Meike Burow, Thure Pavlo Hauser
Plants evolved in close contact with a myriad of microorganisms, some of which formed associations with their roots, benefitting from carbohydrates and other plant resources. In exchange, they evolved to influence important plant functions, e.g. defense against insect herbivores and other antagonists. Here, we test whether a fungus, Metarhizium brunneum, which is mostly known as an insect pathogen
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Less Is More: a Mutation in the Chemical Defense Pathway of Erysimum cheiranthoides (Brassicaceae) Reduces Total Cardenolide Abundance but Increases Resistance to Insect Herbivores J. Chem. Ecol. (IF 2.117) Pub Date : 2020-11-12 Mahdieh Mirzaei, Tobias Züst, Gordon C. Younkin, Amy P. Hastings, Martin L. Alani, Anurag A. Agrawal, Georg Jander
Erysimum cheiranthoides L (Brassicaceae; wormseed wallflower) accumulates not only glucosinolates, which are characteristic of the Brassicaceae, but also abundant and diverse cardenolides. These steroid toxins, primarily glycosylated forms of digitoxigenin, cannogenol, and strophanthidin, inhibit the function of essential Na+/K+-ATPases in animal cells. We screened a population of 659 ethylmethane
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Branch-Localized Induction Promotes Efficacy of Volatile Defences and Herbivore Predation in Trees J. Chem. Ecol. (IF 2.117) Pub Date : 2020-11-12 Martin Volf, Alexander Weinhold, Carlo L. Seifert, Tereza Holicová, Henriette Uthe, Erika Alander, Ronny Richter, Juha-Pekka Salminen, Christian Wirth, Nicole M. van Dam
Induction of plant defences can show various levels of localization, which can optimize their efficiency. Locally induced responses may be particularly important in large plants, such as trees, that show high variability in traits and herbivory rates across their canopies. We studied the branch-localized induction of polyphenols, volatiles (VOCs), and changes in leaf protein content in Carpinus betulus
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Coupling Transcriptomics and Behaviour to Unveil the Olfactory System of Spodoptera exigua Larvae J. Chem. Ecol. (IF 2.117) Pub Date : 2020-11-05 Angel Llopis-Giménez, Tamara Carrasco-Oltra, Emmanuelle Jacquin-Joly, Salvador Herrero, Cristina M. Crava
Insect chemosensation is crucial for many aspects related to food seeking, enemy avoidance, and reproduction. Different families of receptors and binding proteins interact with chemical stimuli, including odorant receptors (ORs), ionotropic receptors (IRs), gustatory receptors (GRs), odorant binding proteins (OBPs) and chemosensory proteins (CSPs). In this work, we describe the chemosensory-related
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Identification of Zingiberenol and Murgantiol as Components of the Aggregation-Sex Pheromone of the Rice Stink Bug, Mormidea v-luteum (Heteroptera: Pentatomidae) J. Chem. Ecol. (IF 2.117) Pub Date : 2020-11-02 Antonioni Acacio Campos Moliterno, Douglas José De Melo, Paulo Henrique Gorgatti Zarbin
Mormidea v-luteum (Lichtenstein, 1796) feeds on commercial crops, such as rice and ryegrass, causing damage that slows growth and reduces productivity. With the aim of developing an eco-friendly control technique, we investigated the compounds involved in chemical communication in this species. The volatiles produced by a group of seven males or females allocated to different aerated glass chambers
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The Importance of Methyl-Branched Cuticular Hydrocarbons for Successful Host Recognition by the Larval Ectoparasitoid Holepyris sylvanidis J. Chem. Ecol. (IF 2.117) Pub Date : 2020-10-29 Sarah Awater-Salendo, Hartwig Schulz, Monika Hilker, Benjamin Fürstenau
Cuticular hydrocarbons (CHCs) of host insects are used by many parasitic wasps as contact kairomones for host location and recognition. As the chemical composition of CHCs varies from species to species, the CHC pattern represents a reliable indicator for parasitoids to discriminate host from non-host species. Holepyris sylvanidis is an ectoparasitoid of beetle larvae infesting stored products. Previous
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Volatile Organic Compounds as Insect Repellents and Plant Elicitors: an Integrated Pest Management (IPM) Strategy for Glasshouse Whitefly ( Trialeurodes vaporariorum ) J. Chem. Ecol. (IF 2.117) Pub Date : 2020-10-27 Niall J.A. Conboy, Thomas McDaniel, David George, Adam Ormerod, Martin Edwards, Paul Donohoe, Angharad M. R Gatehouse, Colin R. Tosh
The glasshouse whitefly (Trialeurodes vaporariorum Westwood) is a polyphagous arthropod pest that is of particular detriment to glasshouse grown tomato (Solanum lycopersicum) across temperate regions of the world. Control of whiteflies with synthetic pesticides has resulted in the evolution of resistant genotypes and a reduction in natural enemies, thus highlighting the need for environmentally sound
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Trap Assays of the Walnut Twig Beetle, Pityophthorus juglandis Blackman (Coleoptera: Curculionidae: Scolytinae), Reveal an Effective Semiochemical Repellent Combination J. Chem. Ecol. (IF 2.117) Pub Date : 2020-10-27 Jackson P. Audley, Richard M. Bostock, Steven J. Seybold
Thousand cankers disease (TCD), is an invasive insect-disease complex caused by the walnut twig beetle, Pityophthorus juglandis, and fungal pathogen, Geosmithia morbida. Semiochemical interruption is a viable option for protecting walnut trees from P. juglandis attack. The goal of this study was to test beetle responses to potential repellent compounds. The results of five, flight-intercept assays
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Female-Based Patterns and Social Function in Avian Chemical Communication J. Chem. Ecol. (IF 2.117) Pub Date : 2020-10-26 Danielle J. Whittaker, Julie C. Hagelin
Much of the growing interest in avian chemical signals has focused on the role of kin recognition or mate attraction, often with an emphasis on males, with uropygial gland secretions perhaps providing information about an individual’s identity and quality. Yet, data collected to date suggest sexual dimorphism in uropygial glands and secretions are often emphasized in female, rather than in male birds
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High Concentrations of Very Long Chain Leaf Wax Alkanes of Thrips Susceptible Pepper Accessions ( Capsicum spp) J. Chem. Ecol. (IF 2.117) Pub Date : 2020-10-22 Mirka Macel, Isabella G. S. Visschers, Janny L. Peters, Nicole M. van Dam, Rob M. de Graaf
The cuticular wax layer can be important for plant resistance to insects. Thrips (Frankliniella occidentalis) damage was assessed on 11 pepper accessions of Capsicum annuum and C. chinense in leaf disc and whole plant assays. Thrips damage differed among the accessions. We analyzed the composition of leaf cuticular waxes of these accessions by GC-MS. The leaf wax composition was different between the
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Constitutive and Inducible Resistance to Thrips Do Not Correlate With Differences in Trichome Density or Enzymatic-Related Defenses in Chrysanthemum J. Chem. Ecol. (IF 2.117) Pub Date : 2020-10-22 Gang Chen, Peter G. L. Klinkhamer, Rocío Escobar-Bravo
Western flower thrips (WFT), Frankliniella occidentalis, is a serious insect pest of Chrysanthemum [Chrysanthemum × morifolium Ramat. (Asteraceae)]. Here we have investigated whether genotypic variation in constitutive and inducible resistance to WFT correlates with phenotypic differences in leaf trichome density and the activity of the defense-related enzyme polyphenol oxidase (PPO) in chrysanthemum
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Light Limitation Impacts Growth but Not Constitutive or Jasmonate Induced Defenses Relevant to Emerald Ash Borer ( Agrilus planipennis ) in White Fringetree ( Chionanthus virginicus ) or Black Ash ( Fraxinus nigra ) J. Chem. Ecol. (IF 2.117) Pub Date : 2020-10-10 Michael S. Friedman, Chad M. Rigsby, Don Cipollini
White fringetree is a host for the invasive emerald ash borer (EAB) but is of lower quality than the related and highly susceptible black ash. Field observations suggest that host trees grown in full sun are more resistant to EAB than those in shade, however the impact of light limitation on chemical defenses has not been assessed. We quantified constitutive and jasmonate-induced phloem defenses and
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Composition of Strawberry Floral Volatiles and their Effects on Behavior of Strawberry Blossom Weevil, Anthonomus rubi J. Chem. Ecol. (IF 2.117) Pub Date : 2020-10-08 Raimondas Mozūraitis, David Hall, Nina Trandem, Baiba Ralle, Kalle Tunström, Lene Sigsgaard, Catherine Baroffio, Michelle Fountain, Jerry Cross, Atle Wibe, Anna-Karin Borg-Karlson
The strawberry blossom weevil (SBW), Anthonomus rubi, is a major pest in strawberry fields throughout Europe. Traps baited with aggregation pheromone are used for pest monitoring. However, a more effective lure is needed. For a number of pests, it has been shown that the attractiveness of a pheromone can be enhanced by host plant volatiles. The goal of this study was to explore floral volatile blends
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Fungal Volatiles as Olfactory Cues for Female Fungus Gnat, Lycoriella ingenua in the Avoidance of Mycelia Colonized Compost J. Chem. Ecol. (IF 2.117) Pub Date : 2020-10-07 Sándor Kecskeméti, Magdolna Olívia Szelényi, Anna Laura Erdei, András Geösel, József Fail, Béla Péter Molnár
The chemical signatures emitted by fungal substrates are key components for mycophagous insects in the search for food source or for suitable oviposition sites. These volatiles are usually emitted by the fruiting bodies and mycelia. The volatiles attract fungivorous insects, like flowers attract pollinators; certain flowers mimic the shape of mushroom fruiting bodies and even produce a typical mushroom
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Variation in Bufadienolide Composition of Parotoid Gland Secretion From Three Taxa of Japanese Toads J. Chem. Ecol. (IF 2.117) Pub Date : 2020-09-30 Takato Inoue, Ryu Nakata, Alan H. Savitzky, Naoko Yoshinaga, Akira Mori, Naoki Mori
Toads of the genus Bufo synthesize and accumulate bufadienolides (BDs) in their parotoid glands. BDs are cardiotonic steroids that play an important role in defense against the toads’ predators. Three bufonid taxa occur in mainland Japan, Bufo japonicus formosus, B. j. japonicus, and B. torrenticola. The chemical structures of BDs isolated from B. j. formosus were studied several decades ago, but there
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Wild Blonde Capuchins ( Sapajus flavius ) Perform Anointing Behaviour Using Toxic Secretions of a Millipede (Spirobolida: Rhinocricidae) J. Chem. Ecol. (IF 2.117) Pub Date : 2020-09-28 Karolina Medeiros, Anielise Campêlo, Artur Campos D. Maia, Robério Freire Filho, Daniela Maria Do Amaral Ferraz Navarro, Amazonas Chagas, Monique Bastos, Gareth Jones, Bruna Bezerra
Defensive secretions of millipedes are remarkable for containing toxic quinones known to efficiently repell hematophagous arthropods. Here we show that Endangered blonde capuchin monkeys make use of such secretions. We (i) describe the anointing behavior performed by the monkeys (ii) identify the millipede species used in the process (iii) describe the volatile chemical composition of its secretion
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Host-Induced Plant Volatiles Mediate Ability of the Parasitoid Microplitis croceipes to Discriminate Between Unparasitized and Parasitized Heliothis virescens Larvae and Avoid Superparasitism J. Chem. Ecol. (IF 2.117) Pub Date : 2020-09-26 Basu D. Kafle, Tolulope Morawo, Henry Fadamiro
In solitary endoparasitoids, oviposition in a host previously parasitized by a conspecific (superparasitism) leads to intraspecific competition, resulting in the elimination of all but one parasitoid offspring. Therefore, avoidance of parasitized hosts presents a strong selective advantage for such parasitoid species. Parasitoids use herbivore-induced plant volatiles (HIPVs) to find their hosts. In
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The Role of Fumonisins in the Biological Interaction between Fusarium verticillioides and Sitophilus zeamais. J. Chem. Ecol. (IF 2.117) Pub Date : 2020-09-18 V L Usseglio,J S Dambolena,M J Martinez,M P Zunino
The aim of the current study was to investigate the entomopathogenic capacity of the mold Fusarium verticillioides and the effect of its mycotoxins fumonisins, on the grain beetle Sitophilus zeamais. We evaluated the capacity of this fungus to infect live insects, the antifungal activity of constituents of the insect’s epicuticle, and the effect of a fumonisin extract on the fitness of the insects
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Determination of Cotton as a Larval Feeding Source for Lepidopteran Moths Using a Derivative from Cotton Metabolites as a Marker by LC-MS/MS Method. J. Chem. Ecol. (IF 2.117) Pub Date : 2020-09-17 Jae Hak Kim,Andreas Lagojda,Dirk Kuehne,Dieudonné Tshitenge Tshitenge,Swapan Chaudhuri,Daniel P Walker,Graham Head
Determination of the feeding history of polyphagous insect pests, such as noctuid moths (Lepidoptera: Noctuidae), is a critical element in developing population and resistance management strategies for such pests. To identify reliable markers for larval host plant determination and to develop simple extraction and detection methods, a metabolomics approach was implemented after acid hydrolysis of adult
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Identification of the Female-Produced Sex Pheromone of the Dotted White Geometrid Naxa seriaria (Lepidoptera: Geometridae). J. Chem. Ecol. (IF 2.117) Pub Date : 2020-09-15 Sung-Chan Lee,Eon-Cheol Koo,Dong-Ha Lee,Seon-Mi Seo,Min-Jung Huh,Il Nam,Ji-Hong Park,Il-Kwon Park
The dotted white geometrid moth, Naxa seriaria Motschulsky (Lepidoptera: Geometridae), is a pest of Oleaceae in Korea, Japan, and China. In this study, we identified (3Z,6Z,9Z,12Z,15Z)-heneicosapentaene (C-21 pentaene) as the only compound in extracts of the pheromone glands of female N. seriaria causing a response from receptors on the antennae of males in analyses by gas chromatography with electroantennographic
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Electrophysiological Responses of the Beech Leaf-Mining Weevil, Orchestes fagi, to Seasonally-Variant Volatile Organic Compounds Emitted by American Beech, Fagus grandifolia. J. Chem. Ecol. (IF 2.117) Pub Date : 2020-09-11 Simon P Pawlowski,Jon D Sweeney,N Kirk Hillier
The beech leaf-mining weevil, Orchestes fagi, is a common pest of European beech, Fagus sylvatica, and has recently become established in Nova Scotia, Canada where it similarly infests American beech, F. grandifolia. We collected volatile organic compounds (VOCs) emitted by F. grandifolia leaves at five developmental stages over one growing season and simultaneously analyzed them for volatile emissions
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Temperature Affects Chemical Defense in a Mite-Beetle Predator-Prey System. J. Chem. Ecol. (IF 2.117) Pub Date : 2020-09-02 Christoph Merkel,Michael Heethoff,Adrian Brückner
Temperature influences all biochemical and biophysiological processes within an organism. By extension, it also affects those ecological interactions that are mediated by gland-produced chemical compounds, such as reservoir-based chemical defense. Herein, we investigate how environmental temperature affects the regeneration of defensive secretions and influences the efficacy of chemical defense in
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Herbivory and Time Since Flowering Shape Floral Rewards and Pollinator-Pathogen Interactions. J. Chem. Ecol. (IF 2.117) Pub Date : 2020-09-02 Luis A Aguirre,Julie K Davis,Philip C Stevenson,Lynn S Adler
Herbivory can induce chemical changes throughout plant tissues including flowers, which could affect pollinator-pathogen interactions. Pollen is highly defended compared to nectar, but no study has examined whether herbivory affects pollen chemistry. We assessed the effects of leaf herbivory on nectar and pollen alkaloids in Nicotiana tabacum, and how herbivory-induced changes in nectar and pollen
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Pollination in the Anthropocene: a Moth Can Learn Ozone-Altered Floral Blends. J. Chem. Ecol. (IF 2.117) Pub Date : 2020-09-02 Brynn Cook,Alexander Haverkamp,Bill S Hansson,T'ai Roulston,Manuel Lerdau,Markus Knaden
Insect pollination is essential to many unmanaged and agricultural systems and as such is a key element in food production. However, floral scents that pollinating insects rely on to locate host plants may be altered by atmospheric oxidants, such as ozone, potentially making these cues less attractive or unrecognizable to foraging insects and decreasing pollinator efficacy. We demonstrate that levels
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Individual Chemical Profiles in the Leach's Storm-Petrel. J. Chem. Ecol. (IF 2.117) Pub Date : 2020-08-28 Sarah L Jennings,Susan E Ebeler
Avian chemical communication, once largely overlooked, is a growing field that has revealed the important role that olfaction plays in the social lives of some birds. Leach’s storm-petrels (Oceanodroma leucorhoa) have a remarkable sense of smell and a strong, musky scent. This long-lived, monogamous seabird relies on olfaction for nest relocation and foraging, but whether they use scent for communication
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Evaluation of Terpene-Volatile Compounds Repellent to the Coffee Berry Borer, Hypothenemus hampei (Ferrari) (Coleoptera: Curculionidae). J. Chem. Ecol. (IF 2.117) Pub Date : 2020-08-17 Carmenza E Góngora,Johanna Tapias,Jorge Jaramillo,Ruben Medina,Sebastian Gonzalez,Herley Casanova,Aristófeles Ortiz,Pablo Benavides
The coffee berry borer (CBB) is one of the main coffee pests in the world including Colombia. This pest is difficult to manage because of its cryptic habits and the continuous availability of coffee fruits. Among the new management strategies being tested is the use of volatile compounds as insect repellents. In this work, the behavioral response of female adult CBBs to terpenes previously identified
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Dominance Hierarchy, Ovarian Activity and Cuticular Hydrocarbons in the Primitively Eusocial Wasp Mischocyttarus cerberus (Vespidae, Polistinae, Mischocyttarini). J. Chem. Ecol. (IF 2.117) Pub Date : 2020-08-13 Rafael Carvalho da Silva,Amanda Prato,Cintia Akemi Oi,Izabel Cristina Casanova Turatti,Fabio Santos Do Nascimento
The dominance hierarchy in primitively eusocial insect societies has been shown to be mainly regulated through aggressive interactions. Females that are generally more dominant stand out and occupy the queen position, meaning that they monopolize reproduction while others perform other tasks. Chemical communication is important for maintaining social cohesion. Cuticular hydrocarbons are recognized
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Chemical Ecology of Multitrophic Microbial Interactions: Plants, Insects, Microbes and the Metabolites that Connect Them. J. Chem. Ecol. (IF 2.117) Pub Date : 2020-08-01 Jared G Ali,C L Casteel,K E Mauck,O Trase
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3,7-Dimethylpentadecane: a Novel Sex Pheromone Component from Leucoptera sinuella (Lepidoptera: Lyonetiidae). J. Chem. Ecol. (IF 2.117) Pub Date : 2020-08-08 Wilson Barros-Parada,Jan Bergmann,Tomislav Curkovic,Cristian Espinosa,Eduardo Fuentes-Contreras,Jorge Guajardo,Heidy Herrera,Sebastián Morales,Abel F O Queiroz,Álvaro Vidal
Leucoptera sinuella is a leaf-miner moth present in several regions in the world, which has been recently introduced into Chile. The larvae feed exclusively on the leaves of poplar and willow trees, and the damage caused by the feeding behavior poses a threat to the wood-producing industry. Besides, L. sinuella larvae invade nearby orchards for pupation, causing rejections in Chilean fresh fruit for
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Pheromone Chemistry of the Citrus Borer, Diploschema rotundicolle (Coleoptera: Cerambycidae). J. Chem. Ecol. (IF 2.117) Pub Date : 2020-08-06 María Eugenia Amorós,Lautaro Lagarde,Hugo Do Carmo,Viviana Heguaburu,Andrés González
The citrus borer, Diploschema rotundicolle, is a Neotropical longhorn beetle that has become a serious citrus pest in southern South America. Management strategies for this insect rely on trimming off damaged shoots, which is expensive and inefficient. We studied the chemical communication system in D. rotundicolle in search of attractants for monitoring or control. GC-MS and enantioselective GC analyses
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(7Z)-Tricosene Improves Pheromone Trap Catch of Raspberry Bud Moth, Heterocrossa rubophaga. J. Chem. Ecol. (IF 2.117) Pub Date : 2020-07-28 Andrew M Twidle,David Barker,D Max Suckling
Heterocrossa rubophaga, the raspberry bud moth, is a pest of commercial Rubus berry crops and wild Rubus species. Its pheromone was initially identified as a single component, (7Z)-nonadecen-11-one. Here we report further investigation of this carposinid pheromone including volatile collection, gland extraction, mass spectrometry, microchemical analysis, electrophysiology and field testing. The alkene
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Modern Maize Hybrids Have Lost Volatile Bottom-Up and Top-Down Control of Dalbulus maidis, a Specialist Herbivore. J. Chem. Ecol. (IF 2.117) Pub Date : 2020-07-27 María Victoria Coll-Aráoz,Jorge G Hill,Erica Luft-Albarracin,Eduardo G Virla,Patricia C Fernandez
Following damage by herbivores, many plants release volatiles that dissuade future conspecifics from feeding. In many crop plants however, induced volatiles mediating this kind of interactions among plants, herbivores and also their natural enemies have been altered through the process of domestication. The selection of crops for increased yield may have gone at a cost of defense, possibly including
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Asymmetric Responses to Climate Change: Temperature Differentially Alters Herbivore Salivary Elicitor and Host Plant Responses to Herbivory. J. Chem. Ecol. (IF 2.117) Pub Date : 2020-07-23 Sulav Paudel,Po-An Lin,Kelli Hoover,Gary W Felton,Edwin G Rajotte
The effect of temperature on insect-plant interactions in the face of changing climate is complex as the plant, its herbivores and their interactions are usually affected differentially leading to an asymmetry in response. Using experimental warming and a combination of biochemical and herbivory bioassays, the effects of elevated temperatures and herbivore damage (Helicoverpa zea) on resistance and
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Phytochemical Study of Safflower Roots (Carthamus tinctorius) on the Induction of Parasitic Plant Germination and Weed Control. J. Chem. Ecol. (IF 2.117) Pub Date : 2020-07-21 Carlos Rial,Sonia Tomé,Rosa M Varela,José M G Molinillo,Francisco A Macías
Weeds have been a major threat in agriculture for several generations as they lead to decreases in productivity and cause significant economic losses. Parasitic plants are a specific type of weed causing losses in crops of great relevance. A new strategy has emerged in the fight against parasitic plants, which is called ‘suicidal germination’ or the ‘honey-pot strategy’. Regarding the problem of weed
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Triatomines of the Genus Rhodnius Do Not Mark Shelters with Feces. J. Chem. Ecol. (IF 2.117) Pub Date : 2020-07-18 Katherine D Mosquera,Marcelo G Lorenzo
Aggregation to volatile compounds emitted by feces has been demonstrated for several triatomine species. This signal guides the insects to suitable places that offer physical protection while providing contact with conspecifics. Though the use of aggregation marks has also been reported for Rhodnius spp., it is still unclear whether feces really cause these insects to aggregate inside shelters. In
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Pheromone Odorant Receptor Responses Reveal the Presence of a Cryptic, Redundant Sex Pheromone Component in the European Corn Borer, Ostrinia nubilalis. J. Chem. Ecol. (IF 2.117) Pub Date : 2020-07-17 Kevin W Wanner,Kevin Moore,Jianrong Wei,Brent C Herdlicka,Charles E Linn,Thomas C Baker
Two odorant receptors (ORs), OnubOR3 and OnubOR6, in the sex pheromone communication systems of E- and Z-strain European corn borers, Ostrinia nubilalis, were broadly receptive to analogs of their pheromone components. In addition to responding to their natural 14-carbon pheromone components, (Z)-11- and (E)-11-tetradecenyl acetates (Z11- and E11-14:OAc), these pheromone ORs responded to the longer-chain
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Major Transitions in Cuticular Hydrocarbon Expression Coincide with Sexual Maturity in a Blowfly (Diptera: Calliphoridae). J. Chem. Ecol. (IF 2.117) Pub Date : 2020-07-15 Nathan J Butterworth,Falko P Drijfhout,Phillip G Byrne,Paul A Keller,James F Wallman
In many animals, there is a prolonged pre-reproductive period prior to sexual maturity. To avoid premature mating attempts, it is common for phenotypic changes to occur during this period that signal the onset of reproductive viability. Among the insects, pre-reproductive phases can last for up to 50% of the adult lifespan, but little is known about the accompanying phenotypic changes that signal sexual
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Correction: Fungal Alkaloid Occurrence in Endophyte-Infected Perennial Ryegrass during Seedling Establishment. J. Chem. Ecol. (IF 2.117) Pub Date : 2020-07-01 Katrin G Hewitt,Wade J Mace,Catherine M McKenzie,Cory Matthew,Alison J Popay
The original version of this article unfortunately contained a mistake. There is a mistake in the affiliation section and Figure 6. The correct affiliation and Figure 6 are shown here.
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Light-Weight Portable Electroantennography Device as a Future Field-Based Tool for Applied Chemical Ecology. J. Chem. Ecol. (IF 2.117) Pub Date : 2020-06-29 Stephen M Pawson,Jessica L Kerr,Brooke C O'Connor,Philippe Lucas,Dominique Martinez,Jeremy D Allison,Tara M Strand
Portable electroantennograms (pEAG) can further our understanding of odor plume dynamics and complement laboratory-based electroantennogram tools. pEAG’s can help to address important questions such as the influence of plume structure on insect behavior, the active space of semiochemical-baited traps, and the impact of biotic and abiotic factors on this active space. Challenges associated with pEAGs
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The Effect of Pheromone Synthesis and Gland Retraction on Translocation and Dynamics of Pheromone Release in the Moth Chloridea virescens. J. Chem. Ecol. (IF 2.117) Pub Date : 2020-06-29 Stephen P Foster,Karin G Anderson
Most species of moths use a female-produced sex pheromone to bring mates together. Typically, sex pheromone is synthesized in a specialized gland and released during the behavior of “calling”, in which the ovipositor and gland are extruded, allowing pheromone to evaporate. Although there has been much study on how a gland makes specific pheromone components, we know relatively little about how it actually
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Attraction of Chrysotropia ciliata (Neuroptera, Chrysopidae) Males to P-Anisaldehyde, a Compound with Presumed Pheromone Function. J. Chem. Ecol. (IF 2.117) Pub Date : 2020-06-26 Gunda Thöming,Sándor Koczor,Ferenc Szentkirályi,Hans R Norli,Marco Tasin,Geir K Knudsen
In a field-trapping experiment with plant volatiles, we observed notably high attraction of green lacewing (Chrysotropia ciliata) males to the compound p-anisaldehyde. Based on this finding, we initiated the present study to elucidate this phenomenon and to investigate the chemical ecology of C. ciliata. Scanning electron microscopy revealed elliptical glands abundantly distributed on the 2nd to 6th
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