David M. Withall
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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: 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: 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: Pea aphid odorant-binding protein ApisOBP6 discriminates between aphid sex pheromone components, aphid alarm pheromone and a host plant volatile
Pea aphid odorant-binding protein ApisOBP6 discriminates between aphid sex pheromone components, aphid alarm pheromone and a host plant volatile Open
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: Enantiomeric Discrimination in Insects: The Role of OBPs and ORs
Enantiomeric Discrimination in Insects: The Role of OBPs and ORs Open
Olfaction is a complex recognition process that is critical for chemical communication in insects. Though some insect species are capable of discrimination between compounds that are structurally similar, little is understood about how thi…
View article: Computational investigation of aphid odorant receptor structure and binding function
Computational investigation of aphid odorant receptor structure and binding function Open
Odorant receptors (OR) play a critical role in signal transduction and olfactory recognition in insects. Unfortunately, insect ORs are difficult to express and purify, and limited structural data are available. Computational methods were u…
View article: Computational investigation of aphid odorant receptor structure and binding function
Computational investigation of aphid odorant receptor structure and binding function Open
Odorant receptors (OR) play a critical role in signal transduction and olfactory recognition in insects. Unfortunately, insect ORs are difficult to express and purify, and limited structural data are available. Computational methods were u…
View article: Bumblebee electric charge stimulates floral volatile emissions in Petunia integrifolia but not in Antirrhinum majus
Bumblebee electric charge stimulates floral volatile emissions in Petunia integrifolia but not in Antirrhinum majus Open
The timing of volatile organic compound (VOC) emission by flowering plants often coincides with pollinator foraging activity. Volatile emission is often considered to be paced by environmental variables, such as light intensity, and/or by …
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: Harnessing microbial volatiles to replace pesticides and fertilizers
Harnessing microbial volatiles to replace pesticides and fertilizers Open
Summary Global agricultural systems are under increasing pressure to deliver sufficient, healthy food for a growing population. Seasonal inputs, including synthetic pesticides and fertilizers, are applied to crops to reduce losses by patho…
View article: Development of an attract-and-infect device for biological control of lesser mealworm, Alphitobius diaperinus (Coleoptera: Tenebrionidae) in poultry houses
Development of an attract-and-infect device for biological control of lesser mealworm, Alphitobius diaperinus (Coleoptera: Tenebrionidae) in poultry houses Open
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: Environmentally vulnerable noble chafers exhibit unusual pheromone-mediated behaviour
Environmentally vulnerable noble chafers exhibit unusual pheromone-mediated behaviour Open
Conserving populations of environmentally vulnerable insect species requires a greater understanding of the factors that determine their abundance and distribution, which requires detailed knowledge of their population and community ecolog…
View article: Development of pull and push–pull systems for management of lesser mealworm, <i>Alphitobius diaperinus</i>, in poultry houses using alarm and aggregation pheromones
Development of pull and push–pull systems for management of lesser mealworm, <i>Alphitobius diaperinus</i>, in poultry houses using alarm and aggregation pheromones Open
BACKGROUND The lesser mealworm, Alphitobius diaperinus (Coleoptera: Tenebrionidae), is the most important insect pest affecting poultry production around the world, with all life stages being susceptible to infection by bacteria, viruses a…
View article: Identification of Volatile Compounds Involved in Host Location by Anthonomus grandis (Coleoptera: Curculionidae)
Identification of Volatile Compounds Involved in Host Location by Anthonomus grandis (Coleoptera: Curculionidae) Open
Phytophagous insects rely on plant volatiles to locate suitable hosts upon which to feed
\nor oviposit. The boll weevil, Anthonomus grandis, is the main pest on cotton crops in the
\nNeotropical region and is attracted to host plant volati…
View article: (2<i>R</i>,5<i>S</i>)‐Theaspirane Identified as the Kairomone for the Banana Weevil, <i>Cosmopolites sordidus,</i> from Attractive Senesced Leaves of the Host Banana, <i>Musa spp</i>.
(2<i>R</i>,5<i>S</i>)‐Theaspirane Identified as the Kairomone for the Banana Weevil, <i>Cosmopolites sordidus,</i> from Attractive Senesced Leaves of the Host Banana, <i>Musa spp</i>. Open
The principal active component produced by highly attractive senesced host banana leaves, Musa spp., for the banana weevil, Cosmopolites sordidus , is shown by coupled gas chromatography‐electroantennography (GC‐EAG), coupled GC‐mass spect…
View article: A crotonyl-CoA reductase-carboxylase independent pathway for assembly of unusual alkylmalonyl-CoA polyketide synthase extender units
A crotonyl-CoA reductase-carboxylase independent pathway for assembly of unusual alkylmalonyl-CoA polyketide synthase extender units Open
View article: Revisiting the Male-Produced Aggregation Pheromone of the Lesser Mealworm, <i>Alphitobius diaperinus</i> (Coleoptera, Tenebrionidae): Identification of a Six-Component Pheromone from a Brazilian Population
Revisiting the Male-Produced Aggregation Pheromone of the Lesser Mealworm, <i>Alphitobius diaperinus</i> (Coleoptera, Tenebrionidae): Identification of a Six-Component Pheromone from a Brazilian Population Open
The lesser mealworm, Alphitobius diaperinus Panzer 1797 (Coleoptera: Tenebrionidae), is a cosmopolitan insect pest affecting poultry production. Due to its cryptic behavior, insecticide control is usually not efficient. Thus, sustainable a…
View article: Structure, Chemical Synthesis, and Biosynthesis of Prodiginine Natural Products
Structure, Chemical Synthesis, and Biosynthesis of Prodiginine Natural Products Open
The prodiginine family of bacterial alkaloids is a diverse set of heterocyclic natural products that have likely been known to man since antiquity. In more recent times, these alkaloids have been discovered to span a wide range of chemical…
View article: Simvastatin Sodium Salt and Fluvastatin Interact with Human Gap Junction Gamma-3 Protein
Simvastatin Sodium Salt and Fluvastatin Interact with Human Gap Junction Gamma-3 Protein Open
Finding pleiomorphic targets for drugs allows new indications or warnings for treatment to be identified. As test of concept, we applied a new chemical genomics approach to uncover additional targets for the widely prescribed lipid-lowerin…