5,765 results match your criteria Journal of chemical ecology[Journal]


(S)-Sulcatol Is a Pheromone Component for Two Species of Cerambycid Beetles in the Subfamily Lamiinae.

J Chem Ecol 2019 Apr 16. Epub 2019 Apr 16.

Department of Entomology, University of Illinois at Urbana-Champaign, 320 Morrill Hall, 505 S. Goodwin Ave., Urbana, IL, 61801, USA.

Males of several species in the large cerambycid beetle subfamily Lamiine, native to South and North America, are known to produce aggregation-sex pheromones composed of three related structures: the sesquiterpene catabolic product geranylacetone, its corresponding alcohol (known as fuscumol), and the acetate ester of the alcohol (fuscumol acetate). Here, we show that males of two lamiine species native to the eastern USA, Astylopsis macula (Say) and Leptostylus transversus (Gyllenhal) (both tribe Acanthocinini), produce pheromones composed of the structurally related (S)-6-methylhept-5-en-2-ol ([S]-sulcatol). Males of both species also produced 6-methylhept-5-en-2-one (sulcatone), and males of A. Read More

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http://dx.doi.org/10.1007/s10886-019-01071-7DOI Listing

Contact Sex Pheromone Activity of Synthetic Gomadalactones in Male White-Spotted Longhorn Beetle, Anoplophora malasiaca (Coleoptera: Cerambycidae).

J Chem Ecol 2019 Apr 3. Epub 2019 Apr 3.

Bioactive Compounds Team, Advanced Analysis Center, National Agriculture and Food Research Organization (NARO), Kannondai, Tsukuba, Ibaraki, 305-8642, Japan.

The elytra of females of the white-spotted longhorn beetle, Anoplophora malasiaca (Coleoptera: Cerambycidae), are coated with a contact sex pheromone, which was previously shown to be composed of at least three chemical groups. Individually, the chemical groups had little pheromonal activity, but a blend of all three exhibited activity equal to that of the crude female extract. Two groups are female-specific aliphatic hydrocarbons and ketones, which were previously synthesized and confirmed to elicit mating behavior. Read More

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http://dx.doi.org/10.1007/s10886-019-01069-1DOI Listing
April 2019
1 Read

Multi-Functional Desaturases in Two Spodoptera Moths with ∆11 and ∆12 Desaturation Activities.

J Chem Ecol 2019 Apr 2. Epub 2019 Apr 2.

Department of Biology, Lund University, Sölvegatan 37, SE-223 62, Lund, Sweden.

The beet armyworm, Spodoptera exigua, uses (Z,E)-9,12-tetradecadienyl acetate as the major component of its sex pheromone. Previous isotope-labeling experiments demonstrated an unusual ∆12 desaturase activity involved in the biosynthesis of this compound; however, the putative ∆12 desaturase gene has not been reported to date. In the present study, we confirmed this ∆12 desaturation pathway by in vivo labeling experiments, and characterized candidate desaturase genes in a yeast heterologous expression system. Read More

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http://dx.doi.org/10.1007/s10886-019-01067-3DOI Listing
April 2019
1 Read

Identification of Aggregation-Sex Pheromone Components for a "Living Fossil", the False Click Beetle, Palaeoxenus dohrni Horn (Coleoptera: Eucnemidae).

J Chem Ecol 2019 Apr 1. Epub 2019 Apr 1.

Department of Entomology, University of California, 900 University Ave., Riverside, CA, 92521, USA.

Insect pheromones have rarely been exploited in surveys or studies of rare and endangered species, despite their potential as effective and highly selective attractants for target species. Here, we report the identification, synthesis, and field bioassays of a male-produced aggregation-sex pheromone blend of a rare false click beetle species endemic to southern California, Dohrn's elegant eucnemid beetle, Palaeoxenus dohrni Horn (Coleoptera: Eucnemidae). This species is the only extant species in its genus and subfamily. Read More

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http://dx.doi.org/10.1007/s10886-019-01068-2DOI Listing

The Combined Use of an Attractive and a Repellent Sex Pheromonal Component by a Gregarious Parasitoid.

J Chem Ecol 2019 Mar 28. Epub 2019 Mar 28.

Laboratory of Fundamental and Applied Research in Chemical Ecology (FARCE), Institute of Biology, University of Neuchâtel, CH-2000, Neuchâtel, Switzerland.

Gregarious parasitoids usually clump their cocoons together and the adults emerge in a synchronized fashion. This makes it easy for them to find mating partners and most copulations indeed take place at the natal patch. Yet, males should leave such sites when females are no longer receptive. Read More

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http://dx.doi.org/10.1007/s10886-019-01066-4DOI Listing

Sorghum 3-Deoxyanthocyanidin Flavonoids Confer Resistance against Corn Leaf Aphid.

J Chem Ecol 2019 Mar 26. Epub 2019 Mar 26.

Plant Science Department, The Pennsylvania State University, University Park, PA, 16803, USA.

In this study we examined the role of sorghum flavonoids in providing resistance against corn leaf aphid (CLA) Rhopalosiphum maidis. In sorghum, accumulation of these flavonoids is regulated by a MYB transcription factor, yellow seed1 (y1). Functional y1 alleles accumulate 3-deoxyflavonoids (3-DFs) and 3-deoxyanthocyanidins (3-DAs) whereas null y1 alleles fail to accumulate these compounds. Read More

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http://link.springer.com/10.1007/s10886-019-01062-8
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http://dx.doi.org/10.1007/s10886-019-01062-8DOI Listing
March 2019
6 Reads

The Role of N,N,N-Trimethylglycine in Oviposition of Eurema mandarina on Albizia julibrissin.

J Chem Ecol 2019 Mar 18. Epub 2019 Mar 18.

Graduate School of Biosphere Science, Hiroshima University, Higashihiroshima, 739-8528, Japan.

The common grass yellow Eurema mandarina (Lepidoptera: Pieridae) uses the silk tree Albizia julibrissin (Fabaceae) as a primary host in Japan. We previously reported that D-pinitol, a cyclitol found in fresh leaves of A. julibrissin, solely elicits moderate oviposition responses from females. Read More

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http://link.springer.com/10.1007/s10886-019-01065-5
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http://dx.doi.org/10.1007/s10886-019-01065-5DOI Listing
March 2019
2 Reads

An Unstable Monoterpene Alcohol as a Pheromone Component of the Longhorned Beetle Paranoplium gracile (Coleoptera: Cerambycidae).

J Chem Ecol 2019 Mar 11. Epub 2019 Mar 11.

Department of Entomology, University of California, Riverside, CA, USA.

We report the identification of p-mentha-1,3-dien-8-ol, an unstable monoterpene alcohol, as a male-produced aggregation-sex pheromone component of the cerambycid beetle Paranoplium gracile (Leconte) (subfamily Cerambycinae, tribe Oemini), a species endemic to California. Headspace volatiles from live males contained a blend of nine cyclic terpenoids that were not detected in analogous samples from females. Volatiles produced by male Eudistenia costipennis Fall, also in the tribe Oemini, contained the same suite of nine compounds. Read More

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http://dx.doi.org/10.1007/s10886-019-01063-7DOI Listing

Author Correction: Ritualised Dung Kicking by White Rhino Males Amplifies Olfactory Signals but Reduces Odour Duration.

J Chem Ecol 2019 Mar 11. Epub 2019 Mar 11.

School of Life Sciences, University of KwaZulu-Natal, Pietermaritzburg, South Africa.

The original version of this article unfortunately contained some mistakes. Read More

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http://dx.doi.org/10.1007/s10886-019-01058-4DOI Listing

Oviposition Experience of Parasitoid Wasps with Nonhost Larvae Affects their Olfactory and Contact-Behavioral Responses toward Host- and Nonhost-Infested Plants.

J Chem Ecol 2019 Mar 11. Epub 2019 Mar 11.

Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, 305-8572, Japan.

In nature, parasitoid wasps encounter and sometimes show oviposition behavior to nonhost species. However, little is known about the effect of such negative incidences on their subsequent host-searching behavior. We tested this effect in a tritrophic system of maize plants (Zea mays), common armyworms (hosts), tobacco cutworms (nonhosts), and parasitoid wasps, Cotesia kariyai. Read More

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http://link.springer.com/10.1007/s10886-019-01064-6
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http://dx.doi.org/10.1007/s10886-019-01064-6DOI Listing
March 2019
3 Reads

Author Correction: Temporal Variation of White Rhino Dung Odours.

J Chem Ecol 2019 Mar 8. Epub 2019 Mar 8.

School of Life Sciences, University of KwaZulu-Natal, Durban, South Africa.

The original version of this article unfortunately contained some mistakes. Read More

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http://dx.doi.org/10.1007/s10886-019-01057-5DOI Listing

Attraction of the Green Lacewing Chrysoperla comanche (Neuroptera: Chrysopidae) to Yeast.

J Chem Ecol 2019 Mar 4. Epub 2019 Mar 4.

Department of Entomology and Nematology, University of California, Davis, CA, 95616, USA.

Many adult Chrysoperla comanche (Stephens) green lacewings were caught in traps baited with live yeast cultures during tests designed to catch olive fruit flies. All 13 yeast species tested were more attractive than the industry-standard dried torula yeast (Cyberlindnera jadinii; syn. Candida utilis). Read More

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http://dx.doi.org/10.1007/s10886-019-01060-wDOI Listing
March 2019
3 Reads

A Practical Technique for Electrophysiologically Recording from Lamellated Antenna of Scarab Beetle.

J Chem Ecol 2019 Mar 2. Epub 2019 Mar 2.

State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, People's Republic of China.

Host-plant volatiles play a key role in finding mate and suitable host plants of phytophagous scarab beetles. Hence it is immensely important to collect and identify these volatiles. The gas chromatography coupled with electroantennographic detection (GC-EAD) technique has been used as a rapid and convenient tool for the identification of physiologically active components from plants. Read More

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http://dx.doi.org/10.1007/s10886-019-01059-3DOI Listing
March 2019
1 Read

Author Correction: Attraction Pheromone of The Benthic Diatom Seminavis robusta: Studies on Structure-Activity Relationships.

J Chem Ecol 2019 Mar 2. Epub 2019 Mar 2.

Institute for Inorganic and Analytical Chemistry, Bioorganic Analytics, Friedrich-Schiller-Universität Jena, Lessingstrasse 8, D-07743, Jena, Germany.

The original version of this article unfortunately contained a mistake. The chemical structure of compound 6 in Fig. 1 was incorrect. Read More

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http://dx.doi.org/10.1007/s10886-019-01061-9DOI Listing

Identification and Field Assay of Two Aggregation Pheromone Components Emitted by Males of the Bark Beetle Polygraphus punctifrons (Coleoptera: Curculionidae).

J Chem Ecol 2019 Feb 23. Epub 2019 Feb 23.

Eco-Chemistry, Department of Chemical Engineering, Mid Sweden University, SE-851 70, Sundsvall, Sweden.

The bark beetle Polygraphus punctifrons (Coleoptera: Curculionidae) is a species that feeds on Norway spruce (Picea abies) and is found in the Northern parts of Europe and Russia. The release of volatile organic compounds (VOCs) produced by males and females of P. punctifrons when the beetles bore into spruce stem sections in a laboratory environment was studied using solid phase microextraction (SPME). Read More

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http://dx.doi.org/10.1007/s10886-019-01056-6DOI Listing
February 2019
1 Read

Semiochemical Regulation of the Intraspecific and Interspecific Behavior of Tomicus yunnanensis and Tomicus minor during the Shoot-Feeding Phase.

J Chem Ecol 2019 Feb 23. Epub 2019 Feb 23.

Key Laboratory of Forest Protection of National Forestry and Grassland Administration, Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing, 100091, People's Republic of China.

Two pine shoot beetles, Tomicus yunnanensis and Tomicus minor, are the most destructive pests of Pinus yunnanensis in southwestern China. We investigated behavioral responses within and between these two species during the shoot-feeding phase using walking bioassays. We also identified the pheromonal aspects of beetles by static solid phase microextraction (SPME) and hindgut extraction following interactive communication by gas chromatography-mass spectroscopy (GC-MS). Read More

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http://dx.doi.org/10.1007/s10886-019-01048-6DOI Listing
February 2019

Plant Approach-Avoidance Response in Locusts Driven by Plant Volatile Sensing at Different Ranges.

J Chem Ecol 2019 Feb 22. Epub 2019 Feb 22.

Department of Entomology, China Agricultural University, Beijing, 100193, People's Republic of China.

Several hypotheses have been proposed to explain how herbivorous insects approach plants by sensing plant volatiles. Insect antennae and maxillary palps are believed to have crucial roles in the detection of host plant volatiles. However, few studies have assessed the roles of these olfactory organs in food selection in terms of the effects of individual volatile compounds from plants at various distances. Read More

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http://dx.doi.org/10.1007/s10886-019-01053-9DOI Listing
February 2019

Cardenolide Intake, Sequestration, and Excretion by the Monarch Butterfly along Gradients of Plant Toxicity and Larval Ontogeny.

J Chem Ecol 2019 Feb 22. Epub 2019 Feb 22.

Department of Ecology & Evolutionary Biology, Cornell University, Ithaca, NY, USA.

Monarch butterflies, Danaus plexippus, migrate long distances over which they encounter host plants that vary broadly in toxic cardenolides. Remarkably little is understood about the mechanisms of sequestration in Lepidoptera that lay eggs on host plants ranging in such toxins. Using closely-related milkweed host plants that differ more than ten-fold in cardenolide concentrations, we mechanistically address the intake, sequestration, and excretion of cardenolides by monarchs. Read More

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http://dx.doi.org/10.1007/s10886-019-01055-7DOI Listing
February 2019

Specificity of Herbivore Defense Responses in a Woody Plant, Black Poplar (Populus nigra).

J Chem Ecol 2019 Feb 21;45(2):162-177. Epub 2019 Feb 21.

Max-Planck-Institute for Chemical Ecology, Hans-Knöll-Strasse 8, 07745, Jena, Germany.

The specificity of woody plant defense responses to different attacking herbivores is poorly known. We investigated the responses of black poplar (Populus nigra) to leaf feeding by three lepidopteran species (Lymantria dispar, Laothoe populi and Amata mogadorensis) and two leaf beetle species (Phratora vulgatissima and Chrysomela populi). Of the direct defenses monitored, increases in trypsin protease inhibitor activity and the salicinoid salicin were triggered by herbivore damage, but this was not herbivore-specific. Read More

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http://dx.doi.org/10.1007/s10886-019-01050-yDOI Listing
February 2019

Characterization of Male-Produced Aggregation Pheromone of the Bean Flower Thrips Megalurothrips sjostedti (Thysanoptera: Thripidae).

J Chem Ecol 2019 Feb 21. Epub 2019 Feb 21.

International Centre of Insect Physiology and Ecology (icipe), P.O. Box 30772-00100, Nairobi, Kenya.

Aggregation of the bean flower thrips, Megalurothrips sjostedti (Trybom) (Thysanoptera: Thripidae), has been observed on cowpea, Vigna unguiculata (L.) Walp. To understand the mechanism underpinning this behavior, we studied the responses of M. Read More

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http://dx.doi.org/10.1007/s10886-019-01054-8DOI Listing
February 2019
2.747 Impact Factor

Semiochemicals Mediating Defense, Intraspecific Competition, and Mate Finding in Leptopilina ryukyuensis and L. japonica (Hymenoptera: Figitidae), Parasitoids of Drosophila.

J Chem Ecol 2019 Feb 13. Epub 2019 Feb 13.

Department of Evolutionary Animal Ecology, Bayreuth University, Bayreuth, Germany.

Deciphering the processes driving the evolution of the diverse pheromone-mediated chemical communication system of insects is a fascinating and challenging task. Understanding how pheromones have arisen has been supported by studies with the model organism Leptopilina heterotoma, a parasitoid wasp whose defensive compound (-)-iridomyrmecin also evolved as a component of the female sex pheromone and as a cue to avoid competition with other females during host search. To understand how compounds can evolve from being non-communicative to having a communicative function and to shed light on the evolution of the multi-functional use of iridomyrmecin in the genus Leptopilina, the chemical communication of two additional species, L. Read More

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http://dx.doi.org/10.1007/s10886-019-01052-wDOI Listing
February 2019

Herbivore-Induced Volatiles from Maize Plants Attract Chelonus insularis, an Egg-Larval Parasitoid of the Fall Armyworm.

J Chem Ecol 2019 Feb 12. Epub 2019 Feb 12.

Grupo de Ecología de Artrópodos y Manejo de Plagas, Departamento de Agricultura, Sociedad y Ambiente, El Colegio de la Frontera Sur, Carretera Antiguo Aeropuerto Km 2.5, 30700, Tapachula, Chiapas, Mexico.

Chelonus insularis (Hymenoptera: Braconidae) is an egg-larval endoparasitoid that attacks several lepidopteran species, including the fall armyworm (FAW), Spodoptera frugiperda, as one of its main hosts. In this study, we identified the volatiles emitted by maize plants undamaged and damaged by S. frugiperda larvae that were attractive to virgin C. Read More

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http://dx.doi.org/10.1007/s10886-019-01051-xDOI Listing
February 2019
9 Reads

Author Correction: An IDS-Type Sesquiterpene Synthase Produces the Pheromone Precursor (Z)-α-Bisabolene in Nezara viridula.

J Chem Ecol 2019 Feb;45(2):198

Department of Biological Sciences, Latham Hall, 220 Ag Quad Lane, Blacksburg, VA, 24061, USA.

The original version of this article unfortunately contained a mistake. Under the heading "Insects" in "Methods and Materials" the sentence "A colony of N. viridula originated with field collections near Tifton, Georgia, USA" is incorrect. Read More

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http://dx.doi.org/10.1007/s10886-019-01049-5DOI Listing
February 2019

Mechanisms of Resistance to Insect Herbivores in Isolated Breeding Lineages of Cucurbita pepo.

J Chem Ecol 2019 Feb 1. Epub 2019 Feb 1.

Department of Ecology and Evolutionary Biology, and Department of Entomology, Cornell University, Ithaca, NY, USA.

Although crop wild ancestors are often reservoirs of resistance traits lost during domestication, examining diverse cultivated germplasm may also reveal novel resistance traits due to distinct breeding histories. Using ten cultivars from two independent domestication events of Cucurbita pepo (ssp. pepo and texana), we identified divergences in constitutive and induced resistance measured by growth of generalist caterpillars and leaf traits. Read More

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http://dx.doi.org/10.1007/s10886-019-01046-8DOI Listing
February 2019
5 Reads

Effects of Pheromone Dose and Conspecific Density on the Use of Aggregation-Sex Pheromones by the Longhorn Beetle Phymatodes grandis and Sympatric Species (Coleoptera: Cerambycidae).

J Chem Ecol 2019 Feb 1. Epub 2019 Feb 1.

Department of Entomology, University of California, Riverside, CA, USA.

Many species of longhorn beetles (Coleoptera: Cerambycidae) utilize male-produced aggregation-sex pheromones that attract both sexes. However, the reasons why and the details of how this type of pheromone is used by cerambycids and other coleopteran species that utilize analogous male-produced pheromones remain unclear. Thus, our goals were to test the hypotheses that 1) cerambycids respond to pheromones in a dose-dependent (= release rate-dependent) manner and 2) pheromone emission is density-dependent. Read More

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http://dx.doi.org/10.1007/s10886-019-01047-7DOI Listing
February 2019

Changes in Toxin Quantities Following Experimental Manipulation of Toxin Reserves in Bufo bufo Tadpoles.

J Chem Ecol 2019 Jan 26. Epub 2019 Jan 26.

Lendület Evolutionary Ecology Research Group, Plant Protection Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, Herman Ottó Str. 15, Budapest, H-1022, Hungary.

Possessing toxins can contribute to an efficient defence against various threats in nature. However, we generally know little about the energy- and time-demands of developing toxicity in animals, which determines the efficiency of chemical defence and its trade-off with other risk-induced phenotypic responses. In this study we examined how immersion into norepinephrine solution inducing the release of stored toxins, administration of mild stress mimicking predator attack or simple handling during experimental procedure affected the quantity and number of toxin compounds present in common toad (Bufo bufo) tadpoles as compared to undisturbed control individuals, and investigated how fast toxin reserves were restored. Read More

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http://dx.doi.org/10.1007/s10886-019-01045-9DOI Listing
January 2019
1 Read

Effects of Non-Protein Amino Acids in Nectar on Bee Survival and Behavior.

J Chem Ecol 2019 Jan 6. Epub 2019 Jan 6.

Department of Life Sciences, University of Siena, via Pier Andrea Mattioli 4, 53100, Siena, Italy.

Nectar mediates complex interactions between plants and animals. Recent research has focused on nectar secondary compounds that may play a role in regulating some of these interactions. These compounds may affect the behavior of nectar feeders by interacting with their neurobiology. Read More

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http://dx.doi.org/10.1007/s10886-018-01044-2DOI Listing
January 2019
2 Reads

Genotypic Variation and Phenotypic Plasticity in Gene Expression and Emissions of Herbivore-Induced Volatiles, and their Potential Tritrophic Implications, in Cranberries.

J Chem Ecol 2019 Jan 3. Epub 2019 Jan 3.

Department of Entomology, Philip E. Marucci Center for Blueberry and Cranberry Research and Extension, Rutgers University, 125A Lake Oswego Road, Chatsworth, NJ, 08019, USA.

Herbivorous insects are important problems in cranberry (Vaccinium macrocarpon Ait.) production. The use of chemical pesticides is common practice, but beneficial insects such as natural enemies of herbivores (e. Read More

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http://dx.doi.org/10.1007/s10886-018-1043-0DOI Listing
January 2019
4 Reads

Differential Susceptibility of Wild and Cultivated Blueberries to an Invasive Frugivorous Pest.

J Chem Ecol 2018 Dec 15. Epub 2018 Dec 15.

Laboratory of Evolutionary Entomology, Institute of Biology, University of Neuchâtel, Emile Argand 11, Case postale 158, 2009, Neuchâtel, Switzerland.

Highbush blueberry is a crop native to the northeast USA that has been domesticated for about 100 years. This study compared the susceptibility of wild and domesticated/cultivated highbush blueberries to an invasive frugivorous pest, the spotted wing drosophila (Drosophila suzukii). We hypothesized that: 1) cultivated fruits are preferred by D. Read More

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http://dx.doi.org/10.1007/s10886-018-1042-1DOI Listing
December 2018
2 Reads

Sex Pheromones of Two Leafminer Species, Antispila oinophylla and Holocacista rivillei (Lepidoptera: Heliozelidae) Infesting Grapevine in Italy.

J Chem Ecol 2019 Jan 14;45(1):1-8. Epub 2018 Dec 14.

Department of Biology, Lund University, Sölvegatan 37, 223 62, Lund, Sweden.

Two heliozelid species, Antispila oinophylla van Nieukerken & Wagner and Holocacista rivillei (Stainton) severely infest Italian grapevines. The volatile pheromones from calling females were collected by solid phase micro extraction (SPME) and analyzed by gas chromatography with electroantennographic detection (GC-EAD). Two compounds from A. Read More

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http://dx.doi.org/10.1007/s10886-018-1036-zDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6326996PMC
January 2019
2 Reads

Toxicity of Milkweed Leaves and Latex: Chromatographic Quantification Versus Biological Activity of Cardenolides in 16 Asclepias Species.

J Chem Ecol 2019 Jan 7;45(1):50-60. Epub 2018 Dec 7.

Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY, 14853, USA.

Cardenolides are classically studied steroidal defenses in chemical ecology and plant-herbivore coevolution. Although milkweed plants (Asclepias spp.) produce up to 200 structurally different cardenolides, all compounds seemingly share the same well-characterized mode of action, inhibition of the ubiquitous Na/K ATPase in animal cells. Read More

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http://dx.doi.org/10.1007/s10886-018-1040-3DOI Listing
January 2019
7 Reads

Mistletoe Versus Host Pine: Does Increased Parasite Load Alter the Host Chemical Profile?

J Chem Ecol 2019 Jan 7;45(1):95-105. Epub 2018 Dec 7.

Terrestrial Ecology Research Group, Department of Ecology, Faculty of Science, University of Granada, Av. Fuentenueva s/n, E-18071, Granada, Spain.

Stress caused by parasitic plants, e.g. mistletoes, alters certain host-plant traits as a response. Read More

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http://dx.doi.org/10.1007/s10886-018-1039-9DOI Listing
January 2019
4 Reads

The Pattern of Straight Chain Hydrocarbons Released by Yucca Flowers (Asparagaceae).

J Chem Ecol 2019 Jan 10;45(1):46-49. Epub 2018 Dec 10.

Institute of Organic Chemistry, Universität Hamburg, Martin-Luther-King-Platz 6, 20146, Hamburg, Germany.

The hydrocarbon pattern in the floral scent of Yucca species was found to comprise a group of unbranched, mid-chain alkanes, alkenes, and an alkadiene. In Y. reverchonii, highly dominant (Z)-8-heptadecene is accompanied by (6Z,9Z)-6,9-heptadecadiene and heptadecane as minor components and by traces of other saturated and unsaturated hydrocarbons with similar chain length. Read More

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http://link.springer.com/10.1007/s10886-018-1037-y
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http://dx.doi.org/10.1007/s10886-018-1037-yDOI Listing
January 2019
17 Reads

Production and Distribution of Aldehyde and Alcohol Sex Pheromone Components in the Pheromone Gland of Females of the Moth Chloridea virescens.

J Chem Ecol 2019 Jan 1;45(1):9-17. Epub 2018 Dec 1.

Entomology Department, North Dakota State University, NDSU Dept 7650, PO Box 6050, Fargo, ND, 58108-6050, USA.

Aldehydes are components of many moth sex pheromones, and are thought to be produced from analogous alcohols by oxidase(s) in the cell membrane or the gland cuticle. This implies that the two types of components are produced and/or stored in different parts of the gland: alcohols in cells and aldehydes in cuticle. Few studies have investigated the distribution of components in moth pheromone glands. Read More

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http://dx.doi.org/10.1007/s10886-018-1041-2DOI Listing
January 2019
3 Reads

Ellagitannins from the Onagraceae Decrease the Performance of Generalist and Specialist Herbivores.

J Chem Ecol 2019 Jan 4;45(1):86-94. Epub 2018 Dec 4.

Department of Biology, University of Toronto Mississauga, Mississauga, ON, L5L 1C6, Canada.

Phenolics have a role in defenses against herbivores, but the defensive functions of specific groups of phenolics are still poorly understood. For example, ellagitannins (a type of hydrolyzable tannin) are predicted to decrease insect herbivore performance, but the effect of different types of ellagitannins on generalist and specialist herbivores has rarely been assessed. Here, we test the effects of the dominant oligomeric ellagitannins of Oenothera biennis and other Onagraceae on herbivore performance. Read More

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http://link.springer.com/10.1007/s10886-018-1038-x
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http://dx.doi.org/10.1007/s10886-018-1038-xDOI Listing
January 2019
4 Reads

Mediation of Impacts of Elevated CO and Light Environment on Arabidopsis thaliana (L.) Chemical Defense against Insect Herbivory Via Photosynthesis.

J Chem Ecol 2019 Jan 22;45(1):61-73. Epub 2018 Nov 22.

Department of Plant Biology, University of Illinois at Urbana-Champaign, 265 Morrill Hall, 505 S. Goodwin, Urbana, IL, 61801, USA.

Elevated CO alters C3 plant tolerance to insect herbivory, as well as the induction kinetics of defense hormones salicylic acid (SA) and jasmonic acid (JA), but the underlying physiological mechanism causing this response is not well understood. In principle, SA could be induced under elevated CO by reactive oxygen signals generated in photosynthesis, ultimately influencing chemical defense. To test whether the effects of elevated CO on C3 plant chemical defense against herbivorous insects are modulated by photosynthesis, Arabidopsis thaliana var. Read More

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http://dx.doi.org/10.1007/s10886-018-1035-0DOI Listing
January 2019
19 Reads

Wax Ester Composition of Songbird Preen Oil Varies Seasonally and Differs between Sexes, Ages, and Populations.

J Chem Ecol 2019 Jan 20;45(1):37-45. Epub 2018 Nov 20.

Department of Biology, The University of Western Ontario, 1151 Richmond St, London, ON, N6A 5B7, Canada.

Chemical signaling has been well studied in invertebrates and mammals but less so in birds, due to the longstanding misconception that olfaction is unimportant or even non-existent in this taxon. However, recent findings suggest that olfaction plays an important role in avian mate choice and reproductive behavior, similar to other taxa. The leading candidate source for compounds involved in avian chemical communication is preen oil, a complex mixture secreted from the uropygial gland. Read More

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http://dx.doi.org/10.1007/s10886-018-1033-2DOI Listing
January 2019
2 Reads

Desiccation Resistance and Micro-Climate Adaptation: Cuticular Hydrocarbon Signatures of Different Argentine Ant Supercolonies Across California.

J Chem Ecol 2018 Dec 15;44(12):1101-1114. Epub 2018 Nov 15.

Department of Environmental Science, Policy, & Management, University of California, 130 Mulford Hall #3114, Berkeley, CA, 94720, USA.

Cuticular hydrocarbons (CHCs), the dominant fraction of the insects' epicuticle and the primary barrier to desiccation, form the basis for a wide range of chemical signaling systems. In eusocial insects, CHCs are key mediators of nestmate recognition, and colony identity appears to be maintained through a uniform CHC profile. In the unicolonial Argentine ant Linepithema humile, an unparalleled invasive expansion has led to vast supercolonies whose nestmates can still recognize each other across thousands of miles. Read More

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http://dx.doi.org/10.1007/s10886-018-1029-yDOI Listing
December 2018
12 Reads

Insectivorous Birds Are Attracted by Plant Traits Induced by Insect Egg Deposition.

J Chem Ecol 2018 Dec 12;44(12):1127-1138. Epub 2018 Nov 12.

Applied Zoology/Animal Ecology, Institute of Biology, Freie Universität Berlin, Haderslebener Str. 9, DE-12163, Berlin, Germany.

Insectivorous birds feed upon all developmental stages of herbivorous insects, including insect eggs if larvae and adults are unavailable. Insect egg deposition on plants can induce plant traits that are subsequently exploited by egg parasitoids searching for hosts. However, it is unknown whether avian predators can also use egg-induced plant changes for prey localization. Read More

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http://link.springer.com/10.1007/s10886-018-1034-1
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http://dx.doi.org/10.1007/s10886-018-1034-1DOI Listing
December 2018
30 Reads

The Male-Produced Aggregation-Sex Pheromone of the Cerambycid Beetle Plagionotus detritus ssp. detritus.

J Chem Ecol 2019 Jan 9;45(1):28-36. Epub 2018 Nov 9.

Unit of Chemical Ecology, Department of Plant Protection Biology, Swedish University of Agricultural Sciences, Box 102, Sundsvägen 14, 230 53, Alnarp, Sweden.

The number of longhorn beetles with confirmed aggregation-sex pheromones has increased rapidly in recent years. However, the species that have been studied most intensively are pests, whereas much less is known about the pheromones of longhorn beetles that are rare or threatened. We studied the cerambycid beetle Plagionotus detritus ssp. Read More

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http://dx.doi.org/10.1007/s10886-018-1031-4DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6327004PMC
January 2019
16 Reads

Identification and Field Testing of Volatile Components in the Sex Attractant Pheromone Blend of Female House Mice.

J Chem Ecol 2019 Jan 9;45(1):18-27. Epub 2018 Nov 9.

Department of Biological Sciences, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada.

Recently, it was reported (i) that the sex pheromone blend of male house mice, Mus musculus, comprises not only volatile components (3,4-dehydro-exo-brevicomin; 2-sec-butyl-4,5-dihydrothiazole) but also a component of low volatility (the sex steroid testosterone), and (ii) that the sex steroids progesterone and estradiol are sex pheromone components of female house mice. Here we tested the hypothesis that the sex attractant pheromone blend of female mice, analogous to that of male mice, also comprises volatile pheromone components. Analyzing by GC-MS the head space volatiles of bedding soiled with urine and feces of laboratory-kept females and males revealed three candidate pheromone components (CPCs) that were adult female-specific: butyric acid, 2-methyl butyric acid and 4-heptanone. Read More

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http://dx.doi.org/10.1007/s10886-018-1032-3DOI Listing
January 2019
2 Reads

Preferences of Specialist and Generalist Mammalian Herbivores for Mixtures Versus Individual Plant Secondary Metabolites.

J Chem Ecol 2019 Jan 6;45(1):74-85. Epub 2018 Nov 6.

Boise State University, 1910 W. University Dr, Boise, ID, 83725, USA.

Herbivores that forage on chemically defended plants consume complex mixtures of plant secondary metabolites (PSMs). However, the mechanisms by which herbivores tolerate mixtures of PSMs are relatively poorly understood. As such, it remains difficult to predict how PSMs, singly or as complex mixtures, influence diet selection by herbivores. Read More

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http://link.springer.com/10.1007/s10886-018-1030-5
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http://dx.doi.org/10.1007/s10886-018-1030-5DOI Listing
January 2019
17 Reads

Accelerated Development and Toxin Tolerance of the Navel Orangeworm Amyelois transitella (Lepidoptera: Pyralidae) in the Presence of Aspergillus flavus.

J Chem Ecol 2018 Dec 28;44(12):1170-1177. Epub 2018 Oct 28.

Department of Entomology, University of Illinois at Urbana-Champaign, 204 Morrill Hall, 505 S. Goodwin Ave, Urbana, IL, 61801, USA.

The navel orangeworm (Amyelois transitella) and the fungus Aspergillus flavus constitute a facultative mutualism and pest complex in tree nut and fruit orchards in California. The possibility exists that the broad detoxification capabilities of A. flavus benefit its insect associate by metabolizing toxicants, including hostplant phytochemicals and pesticides. Read More

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http://link.springer.com/10.1007/s10886-018-1027-0
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http://dx.doi.org/10.1007/s10886-018-1027-0DOI Listing
December 2018
14 Reads

Paenibacillus polymyxa Associated with the Stingless Bee Melipona scutellaris Produces Antimicrobial Compounds against Entomopathogens.

J Chem Ecol 2018 Dec 23;44(12):1158-1169. Epub 2018 Oct 23.

Departamento de Ciências Farmacêuticas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Avenida do Café, s/n, Ribeirão Preto, SP, 14040-903, Brazil.

Social insects are frequently observed in symbiotic association with bacteria that produce antimicrobial natural products as a defense mechanism. There is a lack of studies on the microbiota associated with stingless bees and their antimicrobial compounds. To the best of our knowledge, this study is the first to report the isolation of Paenibacillus polymyxa ALLI-03-01 from the larval food of the stingless bee Melipona scutellaris. Read More

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http://link.springer.com/10.1007/s10886-018-1028-z
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http://dx.doi.org/10.1007/s10886-018-1028-zDOI Listing
December 2018
24 Reads

Correction to: Novel floral scent compounds from night-blooming Araceae pollinated by cyclocephaline scarabs (Melolonthidae, Cyclocephalini).

J Chem Ecol 2019 Feb;45(2):214-215

Department of Biosciences, University of Salzburg, Billrothstraße 11 and Hellbrunnerstraße 34, 5020, Salzburg, Austria.

The original version of this article unfortunately contained a mistake. The description of subheadings of Figs. 4c and d have to be interchanged. Read More

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http://dx.doi.org/10.1007/s10886-018-1026-1DOI Listing
February 2019
4 Reads
2.750 Impact Factor

(Z)-7-Hexadecene is an Aggregation-Sex Pheromone Produced by Males of the South American Cerambycid Beetle Susuacanga octoguttata.

J Chem Ecol 2018 Dec 10;44(12):1115-1119. Epub 2018 Oct 10.

Departments of Entomology and Chemistry, University of California, Riverside, CA, 92521, USA.

We describe the identification, synthesis, and field bioassays of a novel aggregation-sex pheromone produced by males of Susuacanga octoguttata (Germar), a South American cerambycid beetle. Analyses of extracts of headspace volatiles produced by adult beetles revealed a sex-specific compound emitted by males which was identified as (Z)-7-hexadecene by microchemical and spectroscopic analyses. The synthesized pheromone was attractive to beetles of both sexes in field trials. Read More

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http://link.springer.com/10.1007/s10886-018-1024-3
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http://dx.doi.org/10.1007/s10886-018-1024-3DOI Listing
December 2018
4 Reads

Sphagnum Species Modulate their Phenolic Profiles and Mycorrhizal Colonization of Surrounding Andromeda polifolia along Peatland Microhabitats.

J Chem Ecol 2018 Dec 8;44(12):1146-1157. Epub 2018 Oct 8.

Laboratoire ChronoEnvironnement, UMR CNRS 6249 USC INRA, Université de Bourgogne-Franche Comté, 25 211, Montbéliard Cedex, France.

Sphagnum mosses mediate long-term carbon accumulation in peatlands. Given their functional role as keystone species, it is important to consider their responses to ecological gradients and environmental changes through the production of phenolics. We compared the extent to which Sphagnum phenolic production was dependent on species, microhabitats and season, and how surrounding dwarf shrubs responded to Sphagnum phenolics. Read More

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http://link.springer.com/10.1007/s10886-018-1023-4
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http://dx.doi.org/10.1007/s10886-018-1023-4DOI Listing
December 2018
3 Reads

Neuronal Responses of Antennal Olfactory Sensilla to Insect Chemical Repellents in the Yellow Fever Mosquito, Aedes aegypti.

J Chem Ecol 2018 Dec 6;44(12):1120-1126. Epub 2018 Oct 6.

Department of Entomology & Plant Pathology, Auburn University, 301 Funchess Hall, Auburn, AL, 36849-5413, USA.

The yellow fever mosquito, Aedes aegypti, is a vector of many human diseases such as yellow fever, dengue fever, and Zika. As insecticide resistance has been widely reported, chemical repellents have been adopted as alternative options for mosquito and mosquito-borne disease control. This study characterized the responses of olfactory receptor neurons (ORNs) in different types of antennal olfactory sensilla in Ae. Read More

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http://link.springer.com/10.1007/s10886-018-1022-5
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http://dx.doi.org/10.1007/s10886-018-1022-5DOI Listing
December 2018
14 Reads

Methyl Jasmonate Changes the Composition and Distribution Rather than the Concentration of Defence Compounds: a Study on Pyrrolizidine Alkaloids.

J Chem Ecol 2019 Feb 4;45(2):136-145. Epub 2018 Oct 4.

Plant Ecology and Phytochemistry, Institute of Biology, Leiden University, Sylviusweg 72, P. O. Box 9505, 2300 RA, Leiden, The Netherlands.

In this study we investigated the effect of methyl jasmonate (MeJA) application on pyrrolizidine alkaloid (PA) concentration and composition of two closely related Jacobaea species. In addition, we examined whether MeJA application affected herbivory of the polyphagous leaf feeding herbivore Spodoptera exigua. A range of concentrations of MeJA was added to the medium of Jacobaea vulgaris and J. Read More

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http://link.springer.com/10.1007/s10886-018-1020-7
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http://dx.doi.org/10.1007/s10886-018-1020-7DOI Listing
February 2019
4 Reads

Toxic Peptides in Populations of Two Pergid Sawflies, Potential Biocontrol Agents of Brazilian Peppertree.

J Chem Ecol 2018 Dec 1;44(12):1139-1145. Epub 2018 Oct 1.

Invasive Plant Research Laboratory, USDA-ARS, 3225 College Avenue, Ft. Lauderdale, FL, 33314, USA.

Determination of the safety of agents prior to release is one of the most important research goals in biological control. In addition to concerns for the safety of non-target plants, determination of the potential toxic properties of new agents needs to be assessed. Numerous phytophagous insects are defended by chemicals against the attack of natural enemies. Read More

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http://link.springer.com/10.1007/s10886-018-1021-6
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http://dx.doi.org/10.1007/s10886-018-1021-6DOI Listing
December 2018
3 Reads