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tetranychus urticae

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https://www.readbyqxmd.com/read/29456543/no-interactions-of-stacked-bt-maize-with-the-non-target-aphid-rhopalosiphum-padi-and-the-spider-mite-tetranychus-urticae
#1
Yinghua Shu, Jörg Romeis, Michael Meissle
In the agroecosystem, genetically engineered plants producing insecticidal Cry proteins from Bacillus thuringiensis (Bt) interact with non-target herbivores and other elements of the food web. Stacked Bt crops expose herbivores to multiple Cry proteins simultaneously. In this study, the direct interactions between SmartStax® Bt maize producing six different Cry proteins and two herbivores with different feeding modes were investigated. Feeding on leaves of Bt maize had no effects on development time, fecundity, or longevity of the aphid Rhopalosiphum padi (Hemiptera: Aphididae), and no effects on the egg hatching time, development time, sex ratio, fecundity, and survival of the spider mite Tetranychus urticae (Acari: Tetranychidae)...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29453965/effects-of-beauveria-bassiana-on-predation-and-behavior-of-the-predatory-mite-phytoseiulus-persimilis
#2
Shengyong Wu, Zhenlong Xing, Weinan Sun, Xuenong Xu, Ruixia Meng, Zhongren Lei
Determination of intraguild interactions between entomopathogens and predators is important when attempting to use a combination of these two natural enemy groups for biological control of their shared arthropod pest species. This study assessed the effects of Beauveria bassiana on the predation and associated behavior of the predatory mite, Phytoseiulus persimilis, against Tetranychus urticae. The functional response tests showed that P. persimilis exhibited a Holling type II response on the spider mite, Tetranychus urticae, when treated with either a B...
February 14, 2018: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/29435771/identification-of-spider-mite-species-and-their-endosymbionts-using-multiplex-pcr
#3
Flore Zélé, Mylène Weill, Sara Magalhães
Spider mites of the genus Tetranychidae are severe crop pests. In the Mediterranean a few species coexist, but they are difficult to identify based on morphological characters. Additionally, spider mites often harbour several species of endosymbiotic bacteria, which may affect the biology of their hosts. Here, we propose novel, cost-effective, multiplex diagnostic methods allowing a quick identification of spider-mite species as well as of the endosymbionts they carry. First, we developed, and successfully multiplexed in a single PCR, primers to identify Tetranychus urticae, T...
February 12, 2018: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/29423706/active-optical-sensor-assessment-of-spider-mite-damage-on-greenhouse-beans-and-cotton
#4
Daniel E Martin, Mohamed A Latheef
The two-spotted spider mite, Tetranychus urticae Koch, is an important pest of cotton in mid-southern USA and causes yield reduction and deprivation in fiber fitness. Cotton and pinto beans grown in the greenhouse were infested with spider mites at the three-leaf and trifoliate stages, respectively. Spider mite damage on cotton and bean canopies expressed as normalized difference vegetation index indicative of changes in plant health was measured for 27 consecutive days. Plant health decreased incrementally for cotton until day 21 when complete destruction occurred...
February 8, 2018: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/29411186/exploring-virulence-of-new-and-less-studied-species-of-metarhizium-spp-from-brazil-for-two-spotted-spider-mite-control
#5
Thiago Castro, Jørgen Eilenberg, Italo Delalibera
The two-spotted spider mite Tetranychus urticae is an important pest of strawberry crops in Brazil and many other countries. Focus for biocontrol studies involving entomopathogenic fungi has been on three species from the genus Metarhizium: M. anisopliae sensu stricto (s.s.), M. brunneum and M. robertsii. Also, the species Beauveria bassiana has been studied for spider mite control and one isolate (ESALQPL63) is commercially available in Brazil. New and undescribed Metarhizium species have been found recently in Brazil and provide a pool of isolates with potential for biocontrol in Brazil and probably also elsewhere...
February 6, 2018: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/29391538/chitosan-nanoparticles-functionalized-with-%C3%AE-cyclodextrin-a-promising-carrier-for-botanical-pesticides
#6
Estefânia V R Campos, Patrícia L F Proença, Jhones L Oliveira, Cirano C Melville, Jaqueline F Della Vechia, Daniel J de Andrade, Leonardo F Fraceto
Carvacrol and linalool are natural compounds extracted from plants and are known for their insecticidal and repellent activities, respectively. However, their low aqueous solubility, high photosensitivity, and high volatility restrict their application in the control of agricultural pests. The encapsulation of volatile compounds can be an effective way of overcoming such problems. Inclusion complexes between beta-cyclodextrin (β-CD) and carvacrol (CVC) or linalool (LNL) were investigated. Inclusion complexes were prepared by the kneading method...
February 1, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29377385/a-massive-incorporation-of-microbial-genes-into-the-genome-of-tetranychus-urticae-a-polyphagous-arthropod-herbivore
#7
N Wybouw, T Van Leeuwen, W Dermauw
A number of horizontal gene transfers (HGTs) have been identified in the spider mite Tetranychus urticae, a chelicerate herbivore. However, the genome of this mite species has at present not been thoroughly mined for the presence of HGT genes. Here, we performed a systematic screen for HGT genes in the T. urticae genome using the h-index metric. Our results not only validated previously identified HGT genes but also uncovered 25 novel HGT genes. In addition to HGT genes with a predicted biochemical function in carbohydrate, lipid and folate metabolism, we also identified the horizontal transfer of a ketopantoate hydroxymethyltransferase and a pantoate β-alanine ligase gene...
January 29, 2018: Insect Molecular Biology
https://www.readbyqxmd.com/read/29345934/zein-nanoparticles-as-eco-friendly-carrier-systems-for-botanical-repellents-aiming-sustainable-agriculture
#8
Jhones L de Oliveira, Estefânia V R Campos, Anderson E S Pereira, Tatiane Pasquoto, Renata Lima, Renato Grillo, Daniel Junior de Andrade, Fabiano Aparecido Dos Santos, Leonardo Fernandes Fraceto
Botanical repellents represent one of the main ways of reducing the use of synthetic pesticides and the contamination of soil and hydric resources. However, the poor stability and rapid degradation of these compounds in the environment hinder their effective application in the field. Zein nanoparticles can be used as eco-friendly carrier systems to protect these substances against premature degradation, provide desirable release characteristics, and reduce toxicity in the environment and to humans. In this study, we describe the preparation and characterization of zein nanoparticles loaded with the main constituents of the essential oil of citronella (geraniol and R-citronellal)...
February 1, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29250446/a-laboratory-assessment-of-two-local-strains-of-the-beauveria-bassiana-bals-vuill-against-the-tetranychus-urticae-acari-tetranychidae-and-their-potential-as-a-mycopesticide
#9
Serkan Ortucu, Omer Faruk Algur
This study was conducted to assess highly pathogenic Beauveria bassiana isolates to be used in biocontrol and to determine their potentials as mycopesticide. For this purpose, two B. bassiana isolates, which were locally isolated from T. urticae, were chosen. Firstly, three suspensions were investigated at the degree of humidity of 65 ± 5% and 100% RH. Secondly, these strains were selected according to their tendency to mass production, tolerance to UV radiation, and capability of producing spore at the different temperatures...
2017: Journal of Pathogens
https://www.readbyqxmd.com/read/29244858/correction-protocols-for-the-delivery-of-small-molecules-to-the-two-spotted-spider-mite-tetranychus-urticae
#10
Takeshi Suzuki, María Urizarna España, Maria Andreia Nunes, Vladimir Zhurov, Wannes Dermauw, Masahiro Osakabe, Thomas Van Leeuwen, Miodrag Grbic, Vojislava Grbic
[This corrects the article DOI: 10.1371/journal.pone.0180658.].
2017: PloS One
https://www.readbyqxmd.com/read/29210003/abscisic-acid-insensitive-4-transcription-factor-is-an-important-player-in-the-response-of-arabidopsis-thaliana-to-two-spotted-spider-mite-tetranychus-urticae-feeding
#11
Anna Barczak-Brzyżek, Małgorzata Kiełkiewicz, Magdalena Górecka, Karol Kot, Barbara Karpińska, Marcin Filipecki
Plants growing in constantly changeable environmental conditions are compelled to evolve regulatory mechanisms to cope with biotic and abiotic stresses. Effective defence to invaders is largely connected with phytohormone regulation, resulting in the production of numerous defensive proteins and specialized metabolites. In our work, we elucidated the role of the Abscisic Acid Insensitive 4 (ABI4) transcription factor in the plant response to the two-spotted spider mite (TSSM). This polyphagous mite is one of the most destructive herbivores, which sucks mesophyll cells of numerous crop and wild plants...
December 5, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/29186383/effects-of-low-temperature-on-spider-mite-control-by-intermittent-ultraviolet-b-irradiation-for-practical-use-in-greenhouse-strawberries
#12
Kazuhiro Nakai, Yasumasa Murata, Masahiro Osakabe
The application of ultraviolet-B (UVB) radiation to control spider mites is challenging as a key technology for integrated pest management (IPM) in greenhouse strawberries in Japan. To address this, concurrent use of phytoseiid mites and reduced UVB irradiance is desirable to ensure control effects in areas shaded from UVB radiation and to minimize the sunscald in winter, respectively. We designed experiments reproducing the UVB dose on the lower leaf surfaces in strawberry and evaluated the effects of intermittent UVB irradiation at midnight for practical application in the greenhouse and low temperature on the survival of the spider mite Tetranychus urticae Koch (Acari: Tetranychidae) and damage to the phytoseiid mite Neoseiulus californicus (McGregor) (Acari: Phytoseiidae)...
November 23, 2017: Environmental Entomology
https://www.readbyqxmd.com/read/29124341/phytophagy-of-omnivorous-predator-macrolophus-pygmaeus-affects-performance-of-herbivores-through-induced-plant-defences
#13
Nina Xiaoning Zhang, Gerben J Messelink, Juan M Alba, Robert C Schuurink, Merijn R Kant, Arne Janssen
Plants possess various inducible defences that result in synthesis of specialized metabolites in response to herbivory, which can interfere with the performance of herbivores of the same and other species. Much less is known of the effects of plant feeding by omnivores. We found that previous feeding of the omnivorous predator Macrolophus pygmaeus on sweet pepper plants significantly reduced reproduction of the two-spotted spider mite Tetranychus urticae and western flower thrips Frankliniella occidentalis on the same plants, also on leaves that had not been exposed to the omnivore...
November 9, 2017: Oecologia
https://www.readbyqxmd.com/read/29116474/comparative-transcriptomes-and-reciprocal-best-hit-analysis-revealed-potential-pigment-genes-in-two-color-forms-of-tetranychus-urticae
#14
Yi-Dan Mo, Si-Xia Yang, Jing-Yu Zhao, Peng-Yu Jin, Xiao-Yue Hong
Tetranychus urticae Koch is a worldwide agricultural pest. There are two color forms: red and green. The molecular mechanism underlying this color variation is unknown. To elucidate the mechanism, we characterized differentially expressed pigment pathway genes shared in the transcriptomes of these two forms using RNA sequencing and reciprocal best hit analysis. Differentially expressed pigment pathway genes were determined by qRT-PCR to confirm the accuracy of RNA-Seq. The transcriptomes revealed 963 differentially expressed genes (DEGs), of which 687 DEGs were higher in the green form...
November 7, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/29107247/agroinfiltration-based-expression-of-hairpin-rna-in-soybean-plants-for-rna-interference-against-tetranychus-urticae
#15
Vimal Kumar Dubey, Ung Gyu Lee, Deok Ho Kwon, Si Hyeock Lee
The coatomer subunit alpha (COPA) and aquaporin 9 (AQ9) genes from the two-spotted spider mite, Tetranychus urticae, were previously determined to exhibit RNA interference (RNAi)-based lethality when their double-stranded RNAs were systemically delivered via multi-unit chambers (Kwon et al., 2016 [8]). In current study, the hairpin RNAs of the COPA and AQ9 were transiently expressed in soybean plants by agroinfiltration. When T. urticae was fed with the soybean plants agroinfiltrated with the COPA and AQ9 hairpin RNA cassettes, the cumulative mortality increased significantly at 6days post-infestation...
October 2017: Pesticide Biochemistry and Physiology
https://www.readbyqxmd.com/read/29094648/a-gene-family-coding-for-salivary-proteins-shot-of-the-polyphagous-spider-mite-tetranychus-urticae-exhibits-fast-host-dependent-transcriptional-plasticity
#16
Wim Jonckheere, Wannes Dermauw, Mousaalreza Khalighi, Nena Pavlidi, Wim Reubens, Geert Baggerman, Luc Tirry, Gerben Menschaert, Merijn R Kant, Bartel Vanholme, Thomas Van Leeuwen
The salivary protein repertoire released by the herbivorous pest Tetranychus urticae is assumed to hold keys to its success on diverse crops. We report on a spider mite-specific protein family that is expanded in T. urticae. The encoding genes have an expression pattern restricted to the anterior podocephalic glands, while peptide fragments were found in the T. urticae secretome, supporting the salivary nature of these proteins. As peptide fragments were identified in a host-dependent manner, we designated this family as the SHOT (secreted host-responsive protein of Tetranychidae) family...
November 2, 2017: Molecular Plant-microbe Interactions: MPMI
https://www.readbyqxmd.com/read/29069313/developmental-phase-specific-mortality-after-ultraviolet-b-radiation-exposure-in-the-two-spotted-spider-mite
#17
Yasumasa Murata, Masahiro Osakabe
Exposure to ambient ultraviolet-B (UVB) radiation generates DNA lesions, such as cyclobutane pyrimidine dimers and 6-4 pyrimidine-pyrimidine photoproducts in Tetranychus urticae Koch (Acari: Tetranychidae). Larvae appeared normal and healthy after UVB irradiation. Conversely, many mites were trapped in their old epidermis or experienced retarded development and shrunk, thus failing to molt from protochrysalises to protonymphs and died. This suggested that DNA lesions per se were not causing lethality in mites unless damaged genes were expressed...
October 24, 2017: Environmental Entomology
https://www.readbyqxmd.com/read/29044179/the-effect-of-insecticide-synergist-treatment-on-genome-wide-gene-expression-in-a-polyphagous-pest
#18
Simon Snoeck, Robert Greenhalgh, Luc Tirry, Richard M Clark, Thomas Van Leeuwen, Wannes Dermauw
Synergists can counteract metabolic insecticide resistance by inhibiting detoxification enzymes or transporters. They are used in commercial formulations of insecticides, but are also frequently used in the elucidation of resistance mechanisms. However, the effect of synergists on genome-wide transcription in arthropods is poorly understood. In this study we used Illumina RNA-sequencing to investigate genome-wide transcriptional responses in an acaricide resistant strain of the spider mite Tetranychus urticae upon exposure to synergists such as S,S,S-tributyl phosphorotrithioate (DEF), diethyl maleate (DEM), piperonyl butoxide (PBO) and cyclosporin A (CsA)...
October 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29029248/efficacy-of-nanoencapsulated-thymus-eriocalyx-and-thymus-kotschyanus-essential-oils-by-a-mesoporous-material-mcm-41-against-tetranychus-urticae-acari-tetranychidae
#19
Asgar Ebadollahi, Jalal Jalali Sendi, Alireza Aliakbar
Inspite of well-established potentiality of plant essential oils as biopesticides, their environmentally low persistence is considered as a hindering obstacle for its commercialization. In the present study, chemical composition and toxicity of essential oils isolated from leaves of Thymus eriocalyx and Thymus kotschyanus were evaluated against two-spotted spider mite, Tetranychus urticae. The chemicals present in the crude oil were found to be thymol (28.83%), oleic acid (11.51%), palmitic acid (8.60%), borneol (5...
September 27, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/29022207/mite-diversity-acari-tetranychidae-tydeidae-iolinidae-phytoseiidae-and-within-tree-distribution-in-citrus-orchards-in-southern-spain-with-special-reference-to-eutetranychus-orientalis
#20
José Miguel Vela, Eva Wong, Josep A Jaques, Claudio Ledesma, Juan Ramón Boyero
Mite diversity of selected citrus orchards in Andalusia (southern Spain) was studied during 2002-2007. The following species were found: Eutetranychus orientalis, Tetranychus urticae, Panonychus citri (Tetranychidae), Tydeus californicus, Lorryia formosa (Tydeidae), Pronematus ubiquitus (Iolinidae), Euseius stipulatus, Typhlodromus phialatus, Neoseiulus californicus, Euseius scutalis, Phytoseiulus persimilis, Paraseiulus talbii and Neoseiulus cucumeris (Phytoseiidae). Eutetranychus orientalis was the dominant tetranychid species in orange and lemon trees, whereas T...
October 11, 2017: Experimental & Applied Acarology
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