218 results found
Anjum F, Wright DJ, 2022, Foliar Residual Toxicity of Insecticides to Brassica Pests and Their Natural Enemies, JOURNAL OF ECONOMIC ENTOMOLOGY, Vol: 116, Pages: 153-159, ISSN: 0022-0493
Homayoonzadeh M, Michaud JP, Esmaeily M, et al., 2022, Physiological Differences Between Seasonal Dimorphs of Agonoscena pistaciae (Hemiptera: Aphalaridae) Elicit Distinct Host Plant Responses, Informing Novel Pest Management Insights, ENVIRONMENTAL ENTOMOLOGY, Vol: 51, Pages: 969-979, ISSN: 0046-225X
Moran-Bertot I, Rodriguez-Cabrera L, Borras-Hidalgo O, et al., 2021, Potato virus X-mediated constitutive expression of Plutella xylostella PxSDF2L1 gene in Nicotiana benthamiana confers resistance to Phytophthora parasitica var. nicotianae (vol 21, 78, 2021), BMC PLANT BIOLOGY, Vol: 21, ISSN: 1471-2229
Sun Y, Yang L, Rodriguez-Cabrera L, et al., 2021, Tandem Mass Tag-Based Quantitative Proteomics and Virulence Phenotype of Hemolymph-Treated Bacillus thuringiensis kurstaki Cells Reveal New Insights on Bacterial Pathogenesis in Insects, MICROBIOLOGY SPECTRUM, Vol: 9, ISSN: 2165-0497
Ayra-Pardo C, Huang S, Kan Y, et al., 2021, Impact of invasive fall armyworm on plant and arthropod communities and implications for crop protection, INTERNATIONAL JOURNAL OF PEST MANAGEMENT, ISSN: 0967-0874
Moran-Bertot I, Rodriguez-Cabrera L, Borras-Hidalgo O, et al., 2021, Potato virus X-mediated constitutive expression of Plutella xylostella PxSDF2L1 gene in Nicotiana benthamiana confers resistance to Phytophthora parasitica var. nicotianae, BMC Plant Biology, Vol: 21, Pages: 1-9, ISSN: 1471-2229
BackgroundThe Plutella xylostella PxSDF2L1 gene was previously reported to enhance insect resistance to pathogen at high basal transcription rate. PxSDF2L1 shows similitude with the stromal cell-derived factor 2 (SDF2), an ER stress-induced chaperon protein that is highly conserved throughout animals and plants. The precise biological function of SDF2 is not clear, but its expression is required for innate immunity in plants. Here, we investigate whether a continuous expression of PxSDF2L1 in Nicotiana benthamiana can similarly confer resistance to plant pathogen, particularly, the black shank Phytophthora parasitica var. nicotianae.ResultsThe N. benthamiana plants were inoculated with agrobacteria transformed with a PVX-based binary vector carrying the PxSDF2L1 gene; similar agroinoculation experiments with a PVX vector carrying the GFP gene were used for controls. In pot trials, agroinfected N. benthamiana plants constitutively expressing PxSDF2L1 showed a significant reduction of stem disease symptoms caused by the inoculation with P. parasitica, compared with controls.ConclusionsWe confirm a role of PxSDF2L1 in resistance to black shank, with a potential application to engineering active resistance against this oomycete in the commercial N. tabacum species and propose its evaluation in other crop families and plant pathogens.
Pinos D, Chakroun M, Millan-Leiva A, et al., 2020, Reduced membrane-bound alkaline phosphatase does not affect binding of Vip3Aa in aHeliothis virescensResistant colony, Toxins, Vol: 12, Pages: 1-12, ISSN: 2072-6651
The Vip3Aa insecticidal protein from Bacillus thuringiensis (Bt) is produced by specific transgenic corn and cotton varieties for efficient control of target lepidopteran pests. The main threat to this technology is the evolution of resistance in targeted insect pests and understanding the mechanistic basis of resistance is crucial to deploy the most appropriate strategies for resistance management. In this work, we tested whether alteration of membrane receptors in the insect midgut might explain the >2000-fold Vip3Aa resistance phenotype in a laboratory-selected colony of Heliothis virescens (Vip-Sel). Binding of 125I-labeled Vip3Aa to brush border membrane vesicles (BBMV) from 3rd instar larvae from Vip-Sel was not significantly different from binding in the reference susceptible colony. Interestingly, BBMV from Vip-Sel larvae showed dramatically reduced levels of membrane-bound alkaline phosphatase (mALP) activity, which was further confirmed by a strong downregulation of the membrane-bound alkaline phosphatase 1 (HvmALP1) gene. However, the involvement of HvmALP1 as a receptor for the Vip3Aa protein was not supported by results from ligand blotting and viability assays with insect cells expressing HvmALP1.
Martinou AF, Schafer SM, Bueno Mari R, et al., 2020, A call to arms: Setting the framework for a code of practice for mosquito management in European wetlands, JOURNAL OF APPLIED ECOLOGY, Vol: 57, Pages: 1012-1019, ISSN: 0021-8901
Gulzar A, Mukhtar T, Wright DJ, 2020, Effects of entomopathogenic nematodes Steinernema carpocapsae and Heterorhabditis bacteriophora on the fitness of a Vip3A resistant subpopulation of Heliothis virescens (Noctuidae: Lepidoptera), BRAGANTIA, Vol: 79, Pages: 281-292, ISSN: 0006-8705
Ayra-Pardo C, Ochagavia ME, Raymond B, et al., 2019, HT-SuperSAGE of the gut tissue of a Vip3Aa-resistant Heliothis virescens (Lepidoptera: Noctuidae) strain provides insights into the basis of resistance, INSECT SCIENCE, Vol: 26, Pages: 479-498, ISSN: 1672-9609
Rodriguez-de la Noval C, Rodriguez-Cabrera L, Izquierdo L, et al., 2019, Functional expression of a peritrophin A-like SfPER protein is required for larval development in Spodoptera frugiperda (Lepidoptera: Noctuidae), SCIENTIFIC REPORTS, Vol: 9, ISSN: 2045-2322
Pickett BR, Gulzar A, Ferre J, et al., 2017, Bacillus thuringiensis Vip3Aa Toxin Resistance in Heliothis virescens (Lepidoptera: Noctuidae), APPLIED AND ENVIRONMENTAL MICROBIOLOGY, Vol: 83, ISSN: 0099-2240
Ali A, Wright DJ, Tariq K, 2016, Resistance to Peach-potato Aphid, Myzus persicae Sulzer (Hemiptera: Aphididae) in Potato Cultivars, GESUNDE PFLANZEN, Vol: 68, Pages: 213-219, ISSN: 0367-4223
Anjum F, Wright D, 2016, Relative toxicity of insecticides to the crucifer pests Plutella xylostella and Myzus persicae and their natural enemies, Crop Protection, Vol: 88, Pages: 131-136, ISSN: 0261-2194
The widespread and intensive use of conventional pesticides, particularly insecticides, presents a major risk to natural enemies of target pests, as well as to the environment in general. The aim of this study was to investigate the differential intrinsic toxicity of insecticides to two key pests of crucifers, Plutella xylostella and Myzus persicae and their respective hymenopteran parasitoids, Cotesia vestalis and Aphidius colemani. Such knowledge can help inform effective integration of insecticides and biological control in IPM systems. Three insecticides generally regarded as being compatible with natural enemies (abamectin, spinosad and indoxacarb) and one compound regarded as harmful to natural enemies (lambda-cyhalothrin) were examined. A comparative measure of the intrinsic toxicity of fresh deposits of insecticides on Chinese cabbage leaf discs was determined for both pest and parasitoids species after exposure to insecticide for 24 h and 120 h, and after 24 h exposure to insecticide plus 96 h on untreated leaf discs. Differences in the susceptibility of pests and parasitoids to different insecticides were marked for P. xylostella and C. vestalis, LC50 values being significantly lower for the pest species. Such differences were not observed for M. persicae and A. colemani. There was a direct relationship between dose, exposure time and toxicity for all insecticides tested. All insecticides tested showed lower toxicity to both parasitoids compared with P. xylostella, which suggests that for this pest species side-effects on parasitoids can be minimised through IPM practices that reduce exposure time to such non-target organisms.
Midthassel A, Leather SR, Wright DJ, et al., 2016, Compatibility of Amblyseius swirskii with Beauveria bassiana: two potentially complimentary biocontrol agents, BIOCONTROL, Vol: 61, Pages: 437-447, ISSN: 1386-6141
Purnomo H, Wright DJ, 2016, Multiple Release Of Two Different Hymenoptera Parasitoid Of Leafminer Fly, Synergy Or Competition, International Conference on Food, Agriculture and Natural Resources (IC-FANRes), Publisher: ELSEVIER SCIENCE BV, Pages: 64-71, ISSN: 2210-7843
Midthassel A, Leather S, Wright DJ, et al., 2015, An astigmatid defence volatile against a phytoseiid mite, Entomologia Experimentalis et Applicata, Vol: 158, Pages: 97-107, ISSN: 1570-7458
Numerous semiochemicals have been isolated from several species of astigmatid mites with various identified or unidentified functions. Alarm pheromonal activity is widespread with neryl formate and neral, being the most common compounds eliciting alarm response in conspecifics. The cosmopolitan astigmatid mite Suidasia medanensis (= S. pontifica) Oudemans (Acari: Suidasidae) has been reported to use neral as an alarm pheromone, but neral can also act as an allomone towards predators of oribatid mites. Suidasia medanensis can be utilised as a factitious prey for mass-rearing of the phytoseiid predatory mite Amblyseius (= Typhlodromips) swirskii (Athias-Henriot) (Acari: Phytoseiidae), which is used for biological control of insect and mite pests in protected crops. This study investigated the potential defence properties of the S. medanensis volatiles against A. swirskii, comparing the repellency to pollen-reared (naïve) vs. S. medanensis-reared (experienced) predators using a synthetic blend of the isomers neral and geranial (1:1) as a model compound. In a repellency bioassay, the synthetic blend elicited a significant repellence to A. swirskii with no difference between naïve and experienced predators. During capture success studies, S. medanensis under repeated attack could release sufficient quantities of the defence volatile to deter 1–5 attacks from A. swirskii, whereas hexane-treated S. medanensis artificially depleted of volatiles were significantly more vulnerable to an attack. This is the first report of an astigmatid defence volatile with repellent activity to a phytoseiid mite and the starting point to understanding semiochemical interactions in any current or novel factitious predator-prey mass-rearing system.
Ayra-Pardo C, Raymond B, Gulzar A, et al., 2015, Novel genetic factors involved in resistance to Bacillus thuringiensis in Plutella xylostella, INSECT MOLECULAR BIOLOGY, Vol: 24, Pages: 589-600, ISSN: 0962-1075
Gulzar A, Wright DJ, 2015, Sub-lethal effects of Vip3A toxin on survival, development and fecundity of Heliothis virescens and Plutella xylostella, ECOTOXICOLOGY, Vol: 24, Pages: 1815-1822, ISSN: 0963-9292
Macdonald CA, Crawley MJ, Wright DJ, et al., 2015, Identifying qualitative effects of different grazing types on below-ground communities and function in a long-term field experiment, ENVIRONMENTAL MICROBIOLOGY, Vol: 17, Pages: 841-854, ISSN: 1462-2912
Ishtiaq M, Razaq M, Saleem MA, et al., 2014, Stability, cross-resistance and fitness costs of resistance to emamectin benzoate in a re-selected field population of the beet armyworm, Spodoptera exigua (Lepidoptera: Noctuidae), CROP PROTECTION, Vol: 65, Pages: 227-231, ISSN: 0261-2194
Facey SL, Ellsworth DS, Staley JT, et al., 2014, Upsetting the order: how climate and atmospheric change affects herbivore-enemy interactions, CURRENT OPINION IN INSECT SCIENCE, Vol: 5, Pages: 66-74, ISSN: 2214-5745
Tellez-Rodriguez P, Raymond B, Moran-Bertot I, et al., 2014, Strong oviposition preference for Bt over non-Bt maize in Spodoptera frugiperda and its implications for the evolution of resistance, BMC BIOLOGY, Vol: 12
Midthassel A, Leather SR, Wright DJ, et al., 2014, The functional and numerical response of Typhlodromips swirskii (Acari: Phytoseiidae) to the factitious prey Suidasia medanensis (Acari: Suidasidae) in the context of a breeding sachet, BIOCONTROL SCIENCE AND TECHNOLOGY, Vol: 24, Pages: 361-374, ISSN: 0958-3157
Gulzar A, Wright DJ, 2014, Fluctuating Asymmetry, Morphological Changes and Flight Muscle Ratio in a Vip3A Resistant Sub-population of Heliothis virescens (WF06), INTERNATIONAL JOURNAL OF AGRICULTURE AND BIOLOGY, Vol: 16, Pages: 416-420, ISSN: 1560-8530
Clewley GD, Wright DJ, 2014, Winter hosts of Aphalara itadori (Hemiptera: Psyllidae), a classical biological control agent of Fallopia japonica (Polygonaceae), in the UK, BIOCONTROL SCIENCE AND TECHNOLOGY, Vol: 24, Pages: 1197-1201, ISSN: 0958-3157
Tariq M, Rossiter JT, Wright DJ, et al., 2013, Drought alters interactions between root and foliar herbivores, OECOLOGIA, Vol: 172, Pages: 1095-1104, ISSN: 0029-8549
Tariq M, Wright DJ, Bruce TJA, et al., 2013, Drought and Root Herbivory Interact to Alter the Response of Above-Ground Parasitoids to Aphid Infested Plants and Associated Plant Volatile Signals, PLOS ONE, Vol: 8, ISSN: 1932-6203
Furlong MJ, Wright DJ, Dosdall LM, 2013, Diamondback Moth Ecology and Management: Problems, Progress, and Prospects, ANNUAL REVIEW OF ENTOMOLOGY, VOL 58, Editors: Berenbaum, Publisher: ANNUAL REVIEWS, Pages: 517-+
Karimzadeh J, Hardie J, Wright DJ, 2013, Plant Resistance Affects the Olfactory Response and Parasitism Success of Cotesia vestalis, JOURNAL OF INSECT BEHAVIOR, Vol: 26, Pages: 35-50, ISSN: 0892-7553
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