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two spotted spider mite

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https://www.readbyqxmd.com/read/28518067/remote-sensing-evaluation-of-two-spotted-spider-mite-damage-on-greenhouse-cotton
#1
Daniel E Martin, Mohamed A Latheef
The objective of this study was to evaluate a ground-based multispectral optical sensor as a remote sensing tool to assess foliar damage caused by the two-spotted spider mite (TSSM), Tetranychus urticae Koch, on greenhouse grown cotton. TSSM is a polyphagous pest which occurs on a variety of field and horticultural crops. It often becomes an early season pest of cotton in damaging proportions as opposed to being a late season innocuous pest in the mid-southern United States. Evaluation of acaricides is important for maintaining the efficacy of and preventing resistance to the currently available arsenal of chemicals and newly developed control agents...
April 28, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28509945/ant-mediated-indirect-negative-effects-of-aphids-on-spider-mites-living-on-the-same-plant
#2
Masaaki Adachi, Shuichi Yano
Some aphid species are known to have mutualistic relationships with tending ants; that is, the aphids supply the ants with honeydew and are protected by the ants. Although spider mites and honeydew-producing aphids often live on the same host plant, it has not previously been determined whether the ants tending these aphids affect spider mite survival. Using replicated microcosms, each containing an artificial ant nest, we compared experimentally the survival of two-spotted spider mites on kidney bean plants with and without cowpea aphids...
May 16, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28472105/coexistence-of-zoophytophagous-and-phytozoophagous-strategies-linked-to-genotypic-diet-specialization-in-plant-bug
#3
François Dumont, Eric Lucas, Denis Réale
Zoophytophagous predators can substitute zoophagy for phytophagy to complete their development and reproduction. In such predators, variation in feeding behaviour is observed both across and within populations. This may be caused by genetic variation in diet specialization, some genotypes specializing on plant resources, whereas others rely mostly on prey to meet their energy and nutriment requirements. We tested the hypothesis that genotypes specialize either on prey or plant resources in the zoophytophagous mullein bug Campylomma verbasci...
2017: PloS One
https://www.readbyqxmd.com/read/28432470/male-behavioural-plasticity-depends-on-maternal-mating-status-in-the-two-spotted-spider-mite
#4
Keiko Oku, Tom P G van den Beuken
In haplodiploid organisms including the two-spotted spider mite, Tetranychus urticae (Acari: Tetranychidae), both unmated and mated females can produce male offspring. A previous study reported that males produced by unmated females (UM males) find pre-reproductive females more quickly than males produced by mated females (M males) in T. urticae. However, it remains unclear what factors cause the difference. We investigated effects of maternal mating status on mate-searching behaviour of their sons by changing the sons' developmental environment...
April 21, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28405838/acaricidal-and-sublethal-effects-of-a-chenopodium-based-biopesticide-on-the-two-spotted-spider-mite-acari-tetranychidae
#5
Asma Musa, Irena Međo, Ivana Marić, Dejan Marčić
Acaricidal and sublethal effects of the biopesticide Requiem(®)EC (containing an essential oil extract of Chenopodium ambrosioides near ambrosioides) on the two-spotted spider mite, Tetranychus urticae Koch, were evaluated in laboratory bioassays. The biopesticide was applied to bean leaves or leaf discs using a Potter spray tower. Acaricidal activity against eggs and immatures was evaluated in successive acute toxicity bioassays. Concentration-mortality data were subjected to probit analysis and the following LC50 values (ml/l) were calculated: 2...
April 12, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28356611/predatory-interactions-between-prey-affect-patch-selection-by-predators
#6
Yasuyuki Choh, Maurice W Sabelis, Arne Janssen
ABSTRACT: When predators can use several prey species as food sources, they are known to select prey according to foraging efficiency and food quality. However, interactions between the prey species may also affect prey choice, and this has received limited attention. The effect of one such interaction, intraguild predation between prey, on patch selection by predators was studied here. The predatory mite Neoseiulus californicus preys on young larvae of the western flower thrips Frankliniella occidentalis and on all stages of the two-spotted spider mite Tetranychus urticae...
2017: Behavioral Ecology and Sociobiology
https://www.readbyqxmd.com/read/28340275/mini-tomato-genotypes-resistant-to-the-silverleaf-whitefly-and-to-two-spotted-spider-mites
#7
G M Maciel, R S Almeida, J P R da Rocha, V Andaló, G R Marquez, N C Santos, R R Finzi
The mini tomato production has expanded, becoming an amazing alternative for enterprise. Despite all commercial potential, the cultivation has the occurrence of pests as main obstacle during the crop development. Nowadays, there are no researches that aimed obtaining genotypes with high acylsugar content, capable of providing a broad-spectrum resistance to pests. This study aimed the selection of mini tomato genotypes, with high acylsugar content, and checking the resistance level to the silverleaf whitefly [Bemisia tabaci (Gennadius)] and to the two-spotted spider mites (Tetranychus urticae Koch)...
March 22, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28334066/effect-of-drive-row-ground-covers-on-hop-rosales-cannabaceae-yard-arthropod-pests-in-vermont-usa
#8
L Calderwood, J Cubins, D Vesty, H Darby
Alternatives to pesticides are necessary for the management of hop (Humulus lupulus L.) arthropod pests. The three major arthropod pests in northeastern US hop production include two-spotted spider mite, Tetranychus urticae Koch, hop aphid Phorodon humuli (Schrank), and potato leafhopper, Empoasca fabae Harris. This 3-yr study (2012-2014) in Vermont investigated the effect of flowering ground covers on arthropod pest abundance. Hop cultivars 'Nugget' and 'Cascade' were evaluated under a strip-split plot experimental design...
April 1, 2017: Environmental Entomology
https://www.readbyqxmd.com/read/28303192/adaptation-of-acaricide-stress-facilitates-tetranychus-urticae-expanding-against-tetranychus-cinnabarinus-in-china
#9
Wencai Lu, Mengyao Wang, Zhifeng Xu, Guangmao Shen, Peng Wei, Ming Li, William Reid, Lin He
The two-spotted spider mite, Tetranychus urticae, and the carmine spider mite, Tetranychus cinnabarinus, are invasive and native species in China, respectively. Compared with T. cinnabarinus, T. urticae has expanded into most parts of China and has become the dominant species of spider mite since 1983, when it was first reported in China. However, the mechanism of the demographic conversion has not been illuminated. In this study, one T. urticae field population and one T. cinnabarinus field population were isolated from the same plant in the same field, and the toxicological characteristics were compared between these two species...
February 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28217963/divergent-methylation-pattern-in-adult-stage-between-two-forms-of-tetranychus-urticae-acari-tetranychidae
#10
Si-Xia Yang, Chao Guo, Xiu-Ting Zhao, Jing-Tao Sun, Xiao-Yue Hong
The two-spotted spider mite, Tetranychus urticae Koch has two forms: green form and red form. Understanding the molecular basis of how these two forms established without divergent genetic background is an intriguing area. As a well-known epigenetic process, DNA methylation has particularly important roles in gene regulation and developmental variation across diverse organisms that do not alter genetic background. Here, to investigate whether DNA methylation could be associated with different phenotypic consequences in the two forms of T...
February 19, 2017: Insect Science
https://www.readbyqxmd.com/read/28028106/imaginal-feeding-for-progression-of-diapause-phenotype-in-the-two-spotted-spider-mite-acari-tetranychidae
#11
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
#12
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/27873138/photo-enzymatic-repair-of-uvb-induced-dna-damage-in-the-two-spotted-spider-mite-tetranychus-urticae
#13
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...
January 2017: Experimental & Applied Acarology
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
#14
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
#15
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
#16
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/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/27734633/an-e-e-%C3%AE-farnesene-synthase-gene-of-soybean-has-a-role-in-defence-against-nematodes-and-is-involved-in-synthesizing-insect-induced-volatiles
#19
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 catalysed 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 defence against nematodes and insects...
April 2017: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/27703040/the-salivary-protein-repertoire-of-the-polyphagous-spider-mite-tetranychus-urticae-a-quest-for-effectors
#20
Wim Jonckheere, Wannes Dermauw, Vladimir Zhurov, Nicky Wybouw, Jan Van den Bulcke, Carlos A Villarroel, Robert Greenhalgh, Mike Grbić, Rob C Schuurink, Luc Tirry, Geert Baggerman, Richard M Clark, Merijn R Kant, Bartel Vanholme, Gerben Menschaert, Thomas Van Leeuwen
The two-spotted spider mite Tetranychus urticae is an extremely polyphagous crop pest. Alongside an unparalleled detoxification potential for plant secondary metabolites, it has recently been shown that spider mites can attenuate or even suppress plant defenses. Salivary constituents, notably effectors, have been proposed to play an important role in manipulating plant defenses and might determine the outcome of plant-mite interactions. Here, the proteomic composition of saliva from T. urticae lines adapted to various host plants-bean, maize, soy, and tomato-was analyzed using a custom-developed feeding assay coupled with nano-LC tandem mass spectrometry...
December 2016: Molecular & Cellular Proteomics: MCP
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