Chris Bass
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View article: Expanded UDP-glycosyltransferase gene clusters underlie insecticide detoxification in Spodoptera frugiperda
Expanded UDP-glycosyltransferase gene clusters underlie insecticide detoxification in Spodoptera frugiperda Open
As Phase II detoxification enzymes, UDP-glycosyltransferases (UGTs) catalyze the conjugation of sugar moieties to various hydrophobic xenobiotics, thereby increasing their solubility and facilitating excretion. Certain UGT gene families ar…
View article: Pesticide-induced resurgence in brown planthoppers is mediated by action on a suite of genes that promote juvenile hormone biosynthesis and female fecundity
Pesticide-induced resurgence in brown planthoppers is mediated by action on a suite of genes that promote juvenile hormone biosynthesis and female fecundity Open
Pesticide-induced resurgence, increases in pest insect populations following pesticide application, is a serious threat to the sustainable control of many highly damaging crop pests. Resurgence can result from pesticide-enhanced pest repro…
View article: Spread of a Single Superclone Drives Insecticide Resistance in <i>Acyrthosiphon kondoi</i> Across an Invasive Range
Spread of a Single Superclone Drives Insecticide Resistance in <i>Acyrthosiphon kondoi</i> Across an Invasive Range Open
Populations under similar selection pressures may adapt via parallel evolution or dispersal of advantageous alleles. Here, we investigated insecticide resistance in the invasive blue-green aphid, Acyrthosiphon kondoi, which reproduces clon…
View article: Sub-lethal insecticide stress alters epimutation rate but not genetic mutation rate in the pest insect Myzus persicae
Sub-lethal insecticide stress alters epimutation rate but not genetic mutation rate in the pest insect Myzus persicae Open
Insect pests evolve heritable resistance to insecticides through selection acting on genetic variation generated by mutation. It has been hypothesised that exposure to low doses of pesticides may increase mutation rate in pest genomes and …
View article: Pesticide-induced resurgence in brown planthoppers is mediated by action on a suite of genes that promote juvenile hormone biosynthesis and female fecundity
Pesticide-induced resurgence in brown planthoppers is mediated by action on a suite of genes that promote juvenile hormone biosynthesis and female fecundity Open
Pesticide-induced resurgence, increases in pest insect populations following pesticide application, is a serious threat to the sustainable control of many highly damaging crop pests. Resurgence can result from pesticide-enhanced pest repro…
View article: Upregulation of a cytochrome P450 gene, CYP6B50, confers multi-insecticide resistance in Spodoptera frugiperda
Upregulation of a cytochrome P450 gene, CYP6B50, confers multi-insecticide resistance in Spodoptera frugiperda Open
These results identify CYP6B50 as a key generalist detoxification P450 in S. frugiperda and its role in mediating resistance to multiple insecticides. These findings provide insights into the role of cytochrome P450s in the evolution of in…
View article: Identification and functional characterization of silk fibroin genes in leaf‐folding behaviour, silk properties and development of the rice leaf folder, <scp><i>Cnaphalocrocis medinalis</i></scp> (lepidoptera: Pyralidae)
Identification and functional characterization of silk fibroin genes in leaf‐folding behaviour, silk properties and development of the rice leaf folder, <span><i>Cnaphalocrocis medinalis</i></span> (lepidoptera: Pyralidae) Open
BACKGROUND Outbreaks of the rice leaf folder ( Cnaphalocrocis medinalis ) poses a significant threat to rice production. Silk‐spinning creates an enclosed leaf roll that protects larvae from predators and insecticides, while serving as a f…
View article: Pesticide-induced resurgence in brown planthopper is mediated by action on a suite of genes that promote juvenile hormone biosynthesis and female fecundity
Pesticide-induced resurgence in brown planthopper is mediated by action on a suite of genes that promote juvenile hormone biosynthesis and female fecundity Open
Pesticide-induced resurgence, increases in pest insect populations following pesticide application, is a serious threat to the sustainable control of many highly damaging crop pests. Resurgence can result from pesticide-enhanced pest repro…
View article: Differentially spliced mitochondrial CYP419A1 contributes to ethiprole resistance in Nilaparvata lugens
Differentially spliced mitochondrial CYP419A1 contributes to ethiprole resistance in Nilaparvata lugens Open
The brown planthopper Nilaparvata lugens is one of the most economically important pests of cultivated rice in Southeast Asia. Extensive use of insecticide treatments, such as imidacloprid, fipronil and ethiprole, has resulted in the emerg…
View article: Spread of a single superclone drives insecticide resistance in Acyrthosiphon kondoi across an invasive range
Spread of a single superclone drives insecticide resistance in Acyrthosiphon kondoi across an invasive range Open
Populations under similar selection pressures may adapt via parallel evolution or dispersal of advantageous alleles. Here, we investigated insecticide resistance in the invasive blue-green aphid, Acyrthosiphon kondoi, which reproduces clon…
View article: <scp><i>Myzus persicae</i></scp> resistance to neonicotinoids—unravelling the contribution of different mechanisms to phenotype
<span><i>Myzus persicae</i></span> resistance to neonicotinoids—unravelling the contribution of different mechanisms to phenotype Open
Background Deciphering the mechanisms underlying insecticide resistance is key to devising appropriate strategies against this economically important trait. Myzus persicae , the green peach‐potato aphid, is a major pest that has evolved re…
View article: GPCR–MAPK signaling pathways underpin fitness trade-offs in whitefly
GPCR–MAPK signaling pathways underpin fitness trade-offs in whitefly Open
Trade-offs between evolutionary gain and loss are prevalent in nature, yet their genetic basis is not well resolved. The evolution of insect resistance to insecticide is often associated with strong fitness costs; however, how the fitness …
View article: UDP-glycosyltransferases act as key determinants of host plant range in generalist and specialist <i>Spodoptera</i> species
UDP-glycosyltransferases act as key determinants of host plant range in generalist and specialist <i>Spodoptera</i> species Open
Phytophagous insects have evolved sophisticated detoxification systems to overcome the antiherbivore chemical defenses produced by many plants. However, how these biotransformation systems differ in generalist and specialist insect species…
View article: Multiple toxins and a protease contribute to the aphid‐killing ability of <i>Pseudomonas fluorescens</i> <scp>PpR24</scp>
Multiple toxins and a protease contribute to the aphid‐killing ability of <i>Pseudomonas fluorescens</i> <span>PpR24</span> Open
Aphids are globally important pests causing damage to a broad range of crops. Due to insecticide resistance, there is an urgent need to develop alternative control strategies. In our previous work, we found Pseudomonas fluorescens PpR24 ca…
View article: Manipulating multi-level selection in a fungal entomopathogen reveals social conflicts and a method for improving biocontrol traits
Manipulating multi-level selection in a fungal entomopathogen reveals social conflicts and a method for improving biocontrol traits Open
Changes in parasite virulence are commonly expected to lead to trade-offs in other life history traits that can affect fitness. Understanding these trade-offs is particularly important if we want to manipulate the virulence of microbial bi…
View article: Aberrant splicing of a nicotinic acetylcholine receptor alpha 6 subunit is associated with spinosad tolerance in the thrips predator Orius laevigatus
Aberrant splicing of a nicotinic acetylcholine receptor alpha 6 subunit is associated with spinosad tolerance in the thrips predator Orius laevigatus Open
Susceptibility to insecticides is one of the limiting factors preventing wider adoption of natural enemies to control insect pest populations. Identification and selective breeding of insecticide tolerant strains of commercially used biolo…
View article: Dual mutations in the whitefly nicotinic acetylcholine receptor β1 subunit confer target-site resistance to multiple neonicotinoid insecticides
Dual mutations in the whitefly nicotinic acetylcholine receptor β1 subunit confer target-site resistance to multiple neonicotinoid insecticides Open
Neonicotinoid insecticides, which target insect nicotinic acetylcholine receptors (nAChRs), have been widely and intensively used to control the whitefly, Bemisia tabaci , a highly damaging, globally distributed, crop pest. This has inevit…
View article: The molecular determinants of pesticide sensitivity in bee pollinators
The molecular determinants of pesticide sensitivity in bee pollinators Open
Bees carry out vital ecosystem services by pollinating both wild and economically important crop plants. However, while performing this function, bee pollinators may encounter potentially harmful xenobiotics in the environment such as pest…
View article: Symbiotic bacteria confer insecticide resistance by metabolizing buprofezin in the brown planthopper, Nilaparvata lugens (Stål)
Symbiotic bacteria confer insecticide resistance by metabolizing buprofezin in the brown planthopper, Nilaparvata lugens (Stål) Open
Buprofezin, a chitin synthesis inhibitor, is widely used to control several economically important insect crop pests. However, the overuse of buprofezin has led to the evolution of resistance and exposed off-target organisms present in agr…
View article: The role of the Bemisia tabaci and Trialeurodes vaporariorum cytochrome-P450 clade CYP6DPx in resistance to nicotine and neonicotinoids
The role of the Bemisia tabaci and Trialeurodes vaporariorum cytochrome-P450 clade CYP6DPx in resistance to nicotine and neonicotinoids Open
The alkaloid, nicotine, produced by tobacco and other Solanaceae as an anti-herbivore defence chemical is one of the most toxic natural insecticides in nature. However, some insects, such as the whitefly species, Trialeurodes vaporariorum …
View article: A cytochrome P450 insecticide detoxification mechanism is not conserved across the Megachilidae family of bees
A cytochrome P450 insecticide detoxification mechanism is not conserved across the Megachilidae family of bees Open
Recent work has demonstrated that many bee species have specific cytochrome P450 enzymes (P450s) that can efficiently detoxify certain insecticides. The presence of these P450s, belonging or closely related to the CYP9Q subfamily (CYP9Q‐re…