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tetranychus urticae

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https://www.readbyqxmd.com/read/28106771/independent-effects-of-a-herbivore-s-bacterial-symbionts-on-its-performance-and-induced-plant-defences
#1
Heike Staudacher, Bernardus C J Schimmel, Mart M Lamers, Nicky Wybouw, Astrid T Groot, Merijn R Kant
It is well known that microbial pathogens and herbivores elicit defence responses in plants. Moreover, microorganisms associated with herbivores, such as bacteria or viruses, can modulate the plant's response to herbivores. Herbivorous spider mites can harbour different species of bacterial symbionts and exert a broad range of effects on host-plant defences. Hence, we tested the extent to which such symbionts affect the plant's defences induced by their mite host and assessed if this translates into changes in plant resistance...
January 18, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28043338/molecular-diagnostics-for-detecting-pyrethroid-and-abamectin-resistance-mutations-in-tetranychus-urticae
#2
Aris Ilias, Vassilis A Vassiliou, John Vontas, Anastasia Tsagkarakou
Avermectin and pyrethroid resistance mutations (the G314D and the G326E in the glutamate gated chloride channels, and the F1538I in the voltage gated sodium channel) have been reported in the spider mite Tetranychus urticae, one of the most devastating pests of protected and open field crops worldwide. We developed three TaqMan molecular diagnostic assays for monitoring the presence and frequency of these mutations in T. urticae field populations. The TaqMan assays were validated against known genotypes and subsequently used to monitor the frequency of the resistance mutations in eleven T...
January 2017: Pesticide Biochemistry and Physiology
https://www.readbyqxmd.com/read/28040863/male-spider-mites-use-chemical-cues-but-not-the-female-mating-interval-to-choose-between-mates
#3
Leonor R Rodrigues, Alexandre R T Figueiredo, Susana A M Varela, Isabelle Olivieri, Sara Magalhães
The choice of the partner an individual will mate with is expected to strongly impact its fitness. Hence, natural selection has favoured the evolution of cues to distinguish among mates that will provide different fitness benefits to the individual that is choosing. In species with first-male sperm precedence, this is particularly important for males, as mating with mated females will result in no offspring. In the spider mite Tetranychus urticae only the first mating is effective, except if the interval between first and second copulations is shorter than 24 h...
December 31, 2016: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28028106/imaginal-feeding-for-progression-of-diapause-phenotype-in-the-two-spotted-spider-mite-acari-tetranychidae
#4
Shoko Kawaguchi, Yuki Manabe, Tatsuya Sugawara, Masahiro Osakabe
Adult females of the two-spotted spider mite (Tetranychus urticae Koch) enter diapause under conditions of short-day length and low temperature. A conspicuous body color change, from greenish yellow to bright orange, accompanies diapause induction. This pigmentation is attributed to accumulation of keto-carotenoids produced internally from β-carotene, which is a precursor of vitamin A essential for inducing diapause. The quantity of β-carotene transferred from females to eggs has been considered sufficient to induce diapause...
December 2016: Environmental Entomology
https://www.readbyqxmd.com/read/28001328/transcriptome-and-proteome-analyses-reveal-complex-mechanisms-of-reproductive-diapause-in-the-two-spotted-spider-mite-tetranychus-urticae
#5
J-Y Zhao, X-T Zhao, J-T Sun, L-F Zou, S-X Yang, X Han, W-C Zhu, Q Yin, X-Y Hong
Although a variety of factors underlying diapause have been identified in arthropods and other organisms, the molecular mechanisms regulating diapause are still largely unknown. Here, to better understand this process, we examined diapause-associated genes in the two-spotted spider mite, Tetranychus urticae, by comparing the transcriptomes and proteomes of early diapausing and reproductive adult females. Amongst genes underlying diapause revealed by the transcriptomic and proteomic data sets, we described the noticeable change in Ca(2+) -associated genes, including 65 Ca(2+) -binding protein genes and 23 Ca(2+) transporter genes, indicating that Ca(2+) signalling has a substantial role in diapause regulation...
December 21, 2016: Insect Molecular Biology
https://www.readbyqxmd.com/read/27988819/egg-hatching-response-to-a-range-of-ultraviolet-b-uv-b-radiation-doses-for-four-predatory-mites-and-the-herbivorous-spider-mite-tetranychus-urticae
#6
Dimitrios S Koveos, Takeshi Suzuki, Anastasia Terzidou, Anastasia Kokkari, George Floros, Petros Damos, Nikos A Kouloussis
Egg hatchability of four predatory mites-Phytoseiulus persimilis Athias-Henriot, Iphiseius [Amblyseius] degenerans Berlese, Amblyseius swirskii Athias-Henriot, and Euseius finlandicus Oudemans (Acari: Phytoseiidae)-and the spider mite Tetranychus urticae Koch (Acari: Tetranychidae) was determined under various UV-B doses either in constant darkness (DD) or with simultaneous irradiation using white light. Under UV-B irradiation and DD or simultaneous irradiation with white light, the predator's eggs hatched in significantly lower percentages than in the control non-exposed eggs, which indicates deleterious effects of UV-B on embryonic development...
December 17, 2016: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/27986936/quarantine-treatments-of-imported-nursery-plants-and-exported-cut-flowers-by-phosphine-gas-ph3-as-methyl-bromide-alternative
#7
Bong Su Kim, Chung Gyoo Park, Young Mi Moon, Bo Kyung Sung, Yonglin Ren, Stephen J Wylie, Byung Ho Lee
Quarantine treatments by phosphine (PH3) gas have been performed to replace methyl bromide (MeBr) for export cut flowers and imported nursery plant in Korea. In this preliminary study, two dominant insect pests of cut flowers, Tetranychus urticae Koch and Frankliniella occidentalis Pergande, and the dominant insect pest of nursery plants, Planococcus citri Risso, were used to certify optimum concentration and fumigation time, along with evaluation of phytotoxic damages. To validate the results of preliminary tests, quarantine treatments for export cut flowers was performed in a 58-m(3) reefer container...
December 2016: Journal of Economic Entomology
https://www.readbyqxmd.com/read/27986934/effects-of-insecticides-and-fungicides-commonly-used-in-tomato-production-on-phytoseiulus-persimilis-acari-phtyoseiidae
#8
J L Ditillo, G G Kennedy, J F Walgenbach
The twospotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae), is an important pest of tomatoes in North Carolina. Resident populations of the predatory mite Phytoseiulus persimilis have recently been detected on field-grown tomatoes in central North Carolina, and potentially can be a useful biological control agent against T. urticae Laboratory bioassays were used to assess lethal and reproductive effects of 10 insecticides and five fungicides commonly used in commercial tomato production (chlorantraniliprole, spinetoram, permethrin, imidacloprid, dimethoate, dinotefuran, thiamethoxam, bifenthrin, fenpropathrin, lambda-cyhalothrin, azoxystrobin, chlorothalonil, boscalid, cyazofamid, and mancozeb) on P...
December 2016: Journal of Economic Entomology
https://www.readbyqxmd.com/read/27932274/a-glutathione-s-transferase-tugstd05-associated-with-acaricide-resistance-in-tetranychus-urticae-directly-metabolizes-the-complex-ii-inhibitor-cyflumetofen
#9
Nena Pavlidi, Mousaalreza Khalighi, Antonis Myridakis, Wannes Dermauw, Nicky Wybouw, Dimitra Tsakireli, Euripides G Stephanou, Nikolaos E Labrou, John Vontas, Thomas Van Leeuwen
Cyflumetofen is a recently introduced acaricide with a novel mode of action, acting as an inhibitor of complex II of mitochondrial electron transport chain. It is activated by hydrolysis and the resulting de-esterified metabolite is a much stronger inhibitor. Cyflumetofen represents a great addition for the control of mite species including Tetranychus urticae, a major agricultural pest, which has the ability to develop resistance to most classes of pesticides rapidly. A resistant strain (Tu008R) was recently described and synergism experiments pointed towards the involvement of GSTs...
January 2017: Insect Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/27919778/a-mutation-in-the-psst-homologue-of-complex-i-nadh-ubiquinone-oxidoreductase-from-tetranychus-urticae-is-associated-with-resistance-to-meti-acaricides
#10
Sabina Bajda, Wannes Dermauw, Rafaela Panteleri, Naoya Sugimoto, Vassilis Douris, Luc Tirry, Masahiro Osakabe, John Vontas, Thomas Van Leeuwen
The acaricidal compounds pyridaben, tebufenpyrad and fenpyroximate are frequently used in the control of phytophagous mites such as Tetranychus urticae, and are referred to as Mitochondrial Electron Transport Inhibitors, acting at the quinone binding pocket of complex I (METI-I acaricides). Because of their very frequent use, resistance evolved fast more than 20 years ago, and is currently wide-spread. Increased activity of P450 monooxygenases has been often associated with resistance, but target-site based resistance mechanisms were never reported...
January 2017: Insect Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/27873138/photo-enzymatic-repair-of-uvb-induced-dna-damage-in-the-two-spotted-spider-mite-tetranychus-urticae
#11
Yasumasa Murata, Masahiro Osakabe
Ambient ultraviolet-B (UVB) radiation induces lethal effects in the two-spotted spider mite Tetranychus urticae, whereas photoreactivation by irradiation with ultraviolet-A and visible light (VIS) plays an important role to increase survival of mites irradiated by UVB. The physiological mechanisms and ecological significance of photoreactivation in terrestrial arthropods have not been shown clearly. We verified the biological impact and accumulation of DNA lesions by UVB irradiation and the repair of them by photoreactivation in T...
November 21, 2016: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/27845714/beyond-focal-pests-impact-of-a-neonicotinoid-seed-treatment-and-resistant-soybean-lines-on-a-non-target-arthropod
#12
Tülin Özsisli, Deirdre A Prischmann-Voldseth
Integrated pest management (IPM) tactics may effectively control focal pests, but it is also important to test the compatibility of different tactics, and consider non-target organisms. We investigated the effects of a neonicotinoid seed treatment and Rag resistance genes used for soybean aphid (Aphis glycines Matsumura) control on reproduction of a non-target herbivore (twospotted spider mite, Tetranychus urticae Koch) in short-term greenhouse experiments. We also examined interactions between spider mites and a specialist phytoseiid mite [Ambylseius fallacis (Garman)] and assessed the effects of a co-occurring opportunistic omnivore [Frankliniella occidentalis (Pergande)] by including thrips density as a covariate...
November 11, 2016: Insects
https://www.readbyqxmd.com/read/27830375/erratum-to-highly-virulent-beauveria-bassiana-strains-against-the-two-spotted-spider-mite-tetranychus-urticae-show-no-pathogenicity-against-five-phytoseiid-mite-species
#13
Shengyong Wu, Haicui Xie, Maoye Li, Xuenong Xu, Zhongren Lei
No abstract text is available yet for this article.
December 2016: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/27797949/complex-evolutionary-dynamics-of-massively-expanded-chemosensory-receptor-families-in-an-extreme-generalist-chelicerate-herbivore
#14
Phuong Cao Thi Ngoc, Robert Greenhalgh, Wannes Dermauw, Stephane Rombauts, Sabina Bajda, Vladimir Zhurov, Miodrag Grbić, Yves Van de Peer, Thomas Van Leeuwen, Pierre Rouzé, Richard M Clark
While mechanisms to detoxify plant produced, anti-herbivore compounds have been associated with plant host use by herbivores, less is known about the role of chemosensory perception in their life histories. This is especially true for generalists, including chelicerate herbivores that evolved herbivory independently from the more studied insect lineages. To shed light on chemosensory perception in a generalist herbivore, we characterized the chemosensory receptors (CRs) of the chelicerate two-spotted spider mite, Tetranychus urticae, an extreme generalist...
December 14, 2016: Genome Biology and Evolution
https://www.readbyqxmd.com/read/27789296/drought-stress-in-tomato-increases-the-performance-of-adapted-and-non-adapted-strains-of-tetranychus-urticae
#15
Miguel G Ximénez-Embún, Pedro Castañera, Félix Ortego
The performance of the two-spotted spider mite, Tetranychus urticae Koch, on plants depends on the rate of adaptation of mite populations to each particular host and can be influenced by environmental conditions. We have tested the effects of drought stress, caused by water deficiency, in the interaction of tomato plants with tomato adapted (TA) and tomato non-adapted (TNA) strains of T. urticae. Our data revealed that mite performance was enhanced for the TA strain when reared on drought-stressed tomato plants, rising population growth and leaf damage...
January 2017: Journal of Insect Physiology
https://www.readbyqxmd.com/read/27788346/spatial-selection-and-local-adaptation-jointly-shape-life-history-evolution-during-range-expansion
#16
Katrien H P Van Petegem, Jeroen Boeye, Robby Stoks, Dries Bonte
In the context of climate change and species invasions, range shifts increasingly gain attention because the rates at which they occur in the Anthropocene induce rapid changes in biological assemblages. During range shifts, species experience multiple selection pressures. For poleward expansions in particular, it is difficult to interpret observed evolutionary dynamics because of the joint action of evolutionary processes related to spatial selection and to adaptation toward local climatic conditions. To disentangle the effects of these two processes, we integrated stochastic modeling and data from a common garden experiment, using the spider mite Tetranychus urticae as a model species...
November 2016: American Naturalist
https://www.readbyqxmd.com/read/27783179/highly-virulent-beauveria-bassiana-strains-against-the-two-spotted-spider-mite-tetranychus-urticae-show-no-pathogenicity-against-five-phytoseiid-mite-species
#17
Shengyong Wu, Haicui Xie, Maoye Li, Xuenong Xu, Zhongren Lei
Entomopathogenic fungi and predatory mites can independently contribute to suppressing the two-spotted spider mite, Tetranychus urticae Koch. It is important to assess the risk of possible fungal infections in predators when a combination of them are being considered as a tandem control strategy for suppressing T. urticae. The first part of this study tested 12 Beauveria bassiana isolates for virulence in T. urticae. Strains SCWJ-2, SDDZ-9, LNSZ-26, GZGY-1-3 and WLMQ-32 were found to be the most potent, causing 37...
December 2016: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/27777729/metabolic-adaptations-in-a-range-expanding-arthropod
#18
Katrien H P Van Petegem, David Renault, Robby Stoks, Dries Bonte
Despite an increasing number of studies documenting life-history evolution during range expansions or shifts, we lack a mechanistic understanding of the underlying physiological processes. In this explorative study, we used a metabolomics approach to study physiological changes associated with the recent range expansion of the two-spotted spider mite (Tetranychus urticae). Mite populations were sampled along a latitudinal gradient from range core to edge and reared under benign common garden conditions for two generations...
September 2016: Ecology and Evolution
https://www.readbyqxmd.com/read/27759078/genotype-specific-interactions-between-parasitic-arthropods
#19
M Orsucci, M Navajas, S Fellous
Despite the ubiquity of coinfection, we know little of the effects of intra-specific genetic variability on coinfection by distinct parasite species. Here we test the hypothesis that parasite multiplication depends on the combination of parasite genotypes that coinfect the host (that is Genotype.parasite × Genotype.parasite interaction). To that aim, we infected tomato leaves with the ecto-parasitic mites Tetranychus urticae and Tetranychus evansi. We tested all possible combinations between four T. urticae and two T...
October 19, 2016: Heredity
https://www.readbyqxmd.com/read/27734633/an-e-e-%C3%AE-farnesene-synthase-gene-of-soybean-has-a-role-in-defense-against-nematodes-and-is-involved-in-synthesizing-insect-induced-volatiles
#20
Jingyu Lin, Dan Wang, Xinlu Chen, Tobias G Köllner, Mitra Mazarei, Hong Guo, Vincent R Pantalone, Prakash Arelli, Charles Neal Stewart, Ningning Wang, Feng Chen
Plant terpene synthase genes (TPSs) have roles in diverse biological processes. Here we report the functional characterization of one member of the soybean TPS gene family, which was designated GmAFS. Recombinant GmAFS produced in Escherichia coli catalyzed the formation of a sesquiterpene (E,E)-α-farnesene. GmAFS is closely related to (E,E)-α-farnesene synthase gene from apple, both phylogenetically and structurally. GmAFS was further investigated for its biological role in defense against nematodes and insects...
October 13, 2016: Plant Biotechnology Journal
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