John C. Caulfield
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View article: The role of volatile cues in mediating tree host-bacteria-insect interactions in acute oak decline
The role of volatile cues in mediating tree host-bacteria-insect interactions in acute oak decline Open
View article: Inducible Volatile Chemical Signalling Drives Antifungal Activity of <scp> <i>Trichoderma hamatum</i> GD12 </scp> During Confrontation With the Pathogen <scp> <i>Sclerotinia sclerotiorum</i> </scp>
Inducible Volatile Chemical Signalling Drives Antifungal Activity of <span> <i>Trichoderma hamatum</i> GD12 </span> During Confrontation With the Pathogen <span> <i>Sclerotinia sclerotiorum</i> </span> Open
The use of beneficial soil fungi or their natural products offers a more sustainable alternative to synthetic fungicides for pathogen management in crops. Volatile organic compounds (VOCs) produced by such fungi act as semiochemicals that …
View article: Detection of aphid infestation on faba bean (Vicia faba L.) by hyperspectral imaging and spectral information divergence methods
Detection of aphid infestation on faba bean (Vicia faba L.) by hyperspectral imaging and spectral information divergence methods Open
Aphids hide under leaves, reproduce rapidly, and require early detection to prevent crop damage, disease transmission, and ensure effective pest management. This study presents a novel approach for aphid detection by utilizing hyperspectra…
View article: Development of a bioassay guided genome mining approach for antifungal natural product discovery from pseudomonads
Development of a bioassay guided genome mining approach for antifungal natural product discovery from pseudomonads Open
Zymoseptoria tritici causes Septoria Leaf Blotch disease of wheat and has evolved to overcome most chemical and genetic control methods. As such, new tools are required for future disease control. We identified Pseudomonas isolates that an…
View article: Species- and context-dependent responses of green lacewings suggest a complex ecological role for methyl salicylate (Neuroptera: Chrysopidae)
Species- and context-dependent responses of green lacewings suggest a complex ecological role for methyl salicylate (Neuroptera: Chrysopidae) Open
View article: Pheromone stereochemical specificity in the biology of the bean beetle <i>Acanthoscelides obtectus</i>
Pheromone stereochemical specificity in the biology of the bean beetle <i>Acanthoscelides obtectus</i> Open
The dried bean beetle, Acanthoscelides obtectus , is a serious pest of legume crops, particularly Phaseolus vulgaris beans, and its management is challenging due to the beetle's cryptic larval stage. The major male‐produced pheromone of A.…
View article: Variation in suppression of black‐grass by modern and ancestral cereal root exudates
Variation in suppression of black‐grass by modern and ancestral cereal root exudates Open
This study aimed to determine the variability of hexaploid wheat ( Triticum aestivum ), ancestral diploid wheat ( T. monococcum ) and rye ( Secale cereale ) root exudate potential to inhibit the arable weed black‐grass ( Alopecurus myosuro…
View article: Metabolite‐based resistance in wheat varieties to aphid virus vectors: progress and future opportunities
Metabolite‐based resistance in wheat varieties to aphid virus vectors: progress and future opportunities Open
Cereal aphids, Sitobion avenae and Rhopalosiphum padi , cause severe yield loss in wheat crops as a consequence of direct feeding damage and acting as vectors for Barley Yellow Dwarf Virus (BYDV). Insecticides have commonly been used to co…
View article: Investigating the threat to Sitka spruce from <scp> <i>Ips typographus</i> </scp> : discrimination and colonization of Britain's principal commercial conifer by a damaging forest pest
Investigating the threat to Sitka spruce from <span> <i>Ips typographus</i> </span> : discrimination and colonization of Britain's principal commercial conifer by a damaging forest pest Open
BACKGROUND Ips typographus (L.), the eight‐toothed spruce bark beetle (Coleoptera: Scolytinae), has devastated European Norway spruce ( Picea abies ) forests in recent years. For the first time, I. typographus has established localized bre…
View article: Using dynamic headspace collections for bacterial volatile sampling v1
Using dynamic headspace collections for bacterial volatile sampling v1 Open
This protocol describes a step-by-step guide for sampling Volatile Organic Compounds (VOCs) from the headspace of bacterial cultures, using dynamic headspace collections.
View article: Characterisation of aphid antixenosis in aphid‐resistant ancestor wheat, <i>Triticum monococcum</i>
Characterisation of aphid antixenosis in aphid‐resistant ancestor wheat, <i>Triticum monococcum</i> Open
BACKGROUND Due to the increasing presence of insecticide resistance across cereal aphid populations, new aphid management strategies, including the engineering of host resistance to aphids into commercial wheat varieties, are required. Pre…
View article: Yellow rust infection of wheat: How the quantity of light received by wheat seedlings before inoculation affects infection efficiency
Yellow rust infection of wheat: How the quantity of light received by wheat seedlings before inoculation affects infection efficiency Open
Many factors are known to influence infection by cereal rusts, including environmental variables such at light, humidity and temperature, the topography of the leaf surface, as well as plant volatiles. However, few studies have aimed to li…
View article: Novel pheromone-mediated reproductive behaviour in the stag beetle, Lucanus cervus
Novel pheromone-mediated reproductive behaviour in the stag beetle, Lucanus cervus Open
The iconic European stag beetle ( Lucanus cervus ) (Coleoptera: Lucanidae) is one of the largest terrestrial beetles in Europe. Due to decreasing population numbers, thought to be a consequence of habitat loss, this beetle has become a nea…
View article: Solvent Extraction of Polydimethylsiloxane (PDMS) Tubing to capture Volatile Organic Compounds from the Headspace and the Rhizosphere v1
Solvent Extraction of Polydimethylsiloxane (PDMS) Tubing to capture Volatile Organic Compounds from the Headspace and the Rhizosphere v1 Open
This protocol describes a step-by-step guide for sampling Volatile Organic Compounds (VOCs) from the headspace/rhizosphere for synthetic blends and biological samples using polydimethylsiloxane (PDMS) silicon tubing, based on methods repor…
View article: Solvent Extraction of PDMS Tubing as a New Method for the Capture of Volatile Organic Compounds from Headspace
Solvent Extraction of PDMS Tubing as a New Method for the Capture of Volatile Organic Compounds from Headspace Open
Polydimethylsiloxane (PDMS) tubing is increasingly being used to collect volatile organic compounds (VOCs) from static biological headspace. However, analysis of VOCs collected using PDMS tubing often deploys thermal desorption, where samp…
View article: Chemical cues from beetle larvae trigger proliferation and putative virulence gene expression of a plant pathogen
Chemical cues from beetle larvae trigger proliferation and putative virulence gene expression of a plant pathogen Open
Agricultural crop productivity and global forest biomes are coming under increasing threat from insect pests and microbial pathogens. This impact is worsened by inter- kingdom insect-microbe interactions that can increase transmission and …
View article: Investigating volatile semiochemical production from Bos taurus and Bos indicus as a novel phenotype for breeding host resistance to ixodid ticks
Investigating volatile semiochemical production from Bos taurus and Bos indicus as a novel phenotype for breeding host resistance to ixodid ticks Open
Ticks and tick-borne diseases cause significant loss in livestock production with about 80% world's cattle at risk. The cost of chemical control is high and there is an ever-increasing tick resistance to chemical acaricides. Genetic select…
View article: Impact of endophytic colonization by entomopathogenic fungi on the behavior and life history of the tobacco peach aphid Myzus persicae var. nicotianae
Impact of endophytic colonization by entomopathogenic fungi on the behavior and life history of the tobacco peach aphid Myzus persicae var. nicotianae Open
Entomopathogenic fungi can adopt an endophytic lifestyle and provide protection against insect herbivores and plant pathogens. So far, most studies have focused on Beauveria bassiana to increase plant resistance against abiotic and biotic …
View article: Neotropical maize genotypes with different levels of benzoxazinoids affect fall armyworm development
Neotropical maize genotypes with different levels of benzoxazinoids affect fall armyworm development Open
Plants are equipped with various defensive attributes against herbivores, including volatile and nonvolatile compounds. In maize plants, benzoxazinoids mediate resistance against some herbivores, with the most abundant being (2 R )‐2‐β‐D‐g…
View article: Companion and Smart Plants: Scientific Background to Promote Conservation Biological Control
Companion and Smart Plants: Scientific Background to Promote Conservation Biological Control Open
View article: An Innate Preference of Bumblebees for Volatile Organic Compounds Emitted by Phaseolus vulgaris Plants Infected With Three Different Viruses
An Innate Preference of Bumblebees for Volatile Organic Compounds Emitted by Phaseolus vulgaris Plants Infected With Three Different Viruses Open
Cucumber mosaic virus (CMV)-infected tomato ( Solanum lycopersicum L.) plants emit volatile organic compounds (VOCs) attractive to bumblebees ( Bombus terrestris L.), which are important tomato pollinators, but which do not transmit CMV. W…
View article: Identifying aphid resistance in the ancestral wheat Triticum monococcum under field conditions
Identifying aphid resistance in the ancestral wheat Triticum monococcum under field conditions Open
View article: Sex Pheromone of the Alfalfa Plant Bug, Adelphocoris lineolatus: Pheromone Composition and Antagonistic Effect of 1-Hexanol (Hemiptera: Miridae)
Sex Pheromone of the Alfalfa Plant Bug, Adelphocoris lineolatus: Pheromone Composition and Antagonistic Effect of 1-Hexanol (Hemiptera: Miridae) Open
View article: Iridoid Sex Pheromone Biosynthesis in Aphids Mimics Iridoid‐Producing Plants
Iridoid Sex Pheromone Biosynthesis in Aphids Mimics Iridoid‐Producing Plants Open
Biosynthesis of (1 R ,4a S ,7 S ,7a R )‐nepetalactol ( 1 ) and (4a S ,7 S ,7a R) ‐nepetalactone ( 2 ) in plants involves iridoid synthase (ISY), an atypical reductive cyclase that catalyses the reduction of 8‐oxogeranial into the reactive …
View article: Three Aphid-Transmitted Viruses Encourage Vector Migration From Infected Common Bean (Phaseolus vulgaris) Plants Through a Combination of Volatile and Surface Cues
Three Aphid-Transmitted Viruses Encourage Vector Migration From Infected Common Bean (Phaseolus vulgaris) Plants Through a Combination of Volatile and Surface Cues Open
Bean common mosaic virus (BCMV), bean common mosaic necrosis virus (BCMNV), and cucumber mosaic virus (CMV) are important pathogens of common bean ( Phaseolus vulgaris ), a crop vital for food security in sub-Saharan Africa. These viruses …
View article: Electrophysiologically and behaviourally active semiochemicals identified from bed bug refuge substrate
Electrophysiologically and behaviourally active semiochemicals identified from bed bug refuge substrate Open
View article: Responses of the putative trachoma vector, Musca sorbens, to volatile semiochemicals from human faeces
Responses of the putative trachoma vector, Musca sorbens, to volatile semiochemicals from human faeces Open
The putative vector of trachoma, Musca sorbens, prefers to lay its eggs on human faeces on the ground. This study sought to determine whether M. sorbens females were attracted to volatile odours from human faeces in preference to odours fr…
View article: Different Plant Viruses Induce Changes in Feeding Behavior of Specialist and Generalist Aphids on Common Bean That Are Likely to Enhance Virus Transmission
Different Plant Viruses Induce Changes in Feeding Behavior of Specialist and Generalist Aphids on Common Bean That Are Likely to Enhance Virus Transmission Open
Bean common mosaic virus (BCMV), bean common mosaic necrosis virus (BCMNV), and cucumber mosaic virus (CMV) cause serious epidemics in common bean (Phaseolus vulgaris), a vital food security crop in many low-to-medium income countries, par…
View article: Identification of Semiochemicals from Cowpea, Vigna unguiculata, for Low-input Management of the Legume Pod Borer, Maruca vitrata
Identification of Semiochemicals from Cowpea, Vigna unguiculata, for Low-input Management of the Legume Pod Borer, Maruca vitrata Open
Cowpea, Vigna unguiculata L. Walp. (Fabaceae), is one of the most important food legumes grown on the African continent, as it provides an affordable source of dietary protein. Yields of cowpea are significantly reduced through damage by l…
View article: Sensing the Danger Signals: cis-Jasmone Reduces Aphid Performance on Potato and Modulates the Magnitude of Released Volatiles
Sensing the Danger Signals: cis-Jasmone Reduces Aphid Performance on Potato and Modulates the Magnitude of Released Volatiles Open
In response to herbivory, plants synthesize and release variable mixtures of herbivore-induced plant volatiles (HIPVs) as indirect defense traits. Such induction of indirect plant defense can also be “switched on” by certain chemicals know…