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https://www.readbyqxmd.com/read/29330177/incidence-of-facultative-bacterial-endosymbionts-in-spider-mites-associated-with-local-environment-and-host-plant
#1
Yu-Xi Zhu, Yue-Ling Song, Yan-Kai Zhang, Ary A Hoffmann, Jin-Cheng Zhou, Jing-Tao Sun, Xiao-Yue Hong
Spider mites are frequently associated with multiple endosymbionts whose infection patterns often exhibit spatial and temporal variation. However, the association between endosymbiont prevalence and environmental factors remains unclear. Here, we surveyed endosymbionts in natural populations of the spider mite, Tetranychus truncatus, in China, screening 935 spider mites from 21 localities and 12 host plant species. Three facultative endosymbiont lineages, Wolbachia, Cardinium, and Spiroplasma, were detected at different infection frequencies (52...
January 12, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29316710/novel-4-methylumbelliferone-amide-derivatives-synthesis-characterization-and-pesticidal-activities
#2
Yan Wei, Kai-Long Miao, Shuang-Hong Hao
A series of novel 4-methylumbelliferone amide derivatives were designed, synthesized and characterized by ¹H NMR, 13C NMR and HR-ESI-MS. The structures of compounds 4bd and 4be (compounds named by authors) were further confirmed by X-ray single crystal diffraction. The acaricidal, herbicidal and antifungal activities of the synthesized compounds were assayed for their potential use as pesticide. The results indicated that compounds 4bi, 4ac and 4bd were strong acaricidals against Tetranychus cinnabarinus, with 72h corrected mortalities of greater than 80% at 1000 mg/L...
January 8, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29287959/synthesis-of-andrographolide-related-esters-as-insecticidal-and-acaricidal-agents
#3
Xiaobo Huang, Bingchuan Zhang, Hui Xu
In continuation of our program aimed at the development of natural product-based pesticidal agents, a series of andrographolide-related esters, such as 3,19-dialkyl(aryl)carbonyloxy andrographolide (3a-g), 3-alkyl(aryl)carbonyloxyandrographolide (4a-g), and 19-alkyl(aryl)carbonyloxyandrographolide (5a-g), were prepared. Their structures were well characterized by 1H NMR, IR, optical rotation, HRMS and mp. Especially three-dimensional structures of compounds 3a, 4g, and 5g were unambiguously confirmed by single-crystal X-ray diffraction...
December 19, 2017: Bioorganic & Medicinal Chemistry Letters
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
#4
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
#5
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/29220518/temperature-dependent-development-of-oligota-flavicornis-coleoptera-staphylinidae-preying-on-tetranychus-cinnabarinus-acarina-tetranychidae
#6
Tao Lin, Yong You, Zhao-Hua Zeng, Shuo Lin, Yi-Xin Chen, Hong-Jiao Cai, Jian-Wei Zhao, Hui Wei
The effect of nine constant temperatures on developmental time of Oligota flavicornis (Boisduval and Lacordaire) preying on Tetranychus cinnabarinus (Boisduval) (Acari: Tetranychidae) eggs was determined under laboratory conditions of 75 ± 5% RH and a 16:8 (L:D) h photoperiod. O. flavicornis survival rates were highest between 18 and 30°C, although O. flavicornis eggs developed successfully to adults at 12-32°C, and the developmental durations to adult at the seven temperatures (12, 15, 18, 20, 25, 30, and 32°C) were 114...
December 5, 2017: Journal of Economic Entomology
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
#7
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/29186906/design-synthesis-and-bioactivities-of-novel-isoxazole-containing-pyrazole-oxime-derivatives
#8
Hong Dai, Wei Yao, Yuan Fang, Siyu Sun, Yujun Shi, Jia Chen, Guoqing Jiang, Jian Shi
In this study, in order to find novel biologically active pyrazole oxime derivatives, twenty-eight new pyrazole oxime compounds containing a substituted isoxazole ring were synthesized and evaluated for their acaricidaland insecticidal activities. Bioassays exhibited that some target compounds indicated good acaricidal and insecticidal activities against Tetranychus cinnabarinus, Aphis medicaginis, Mythimna separata, and Nilaparvata lugens. Especially, compounds 9c, 9h, 9u, and 9v showed 100.00%, 90.56%, 90...
November 27, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
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
#9
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
#10
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
#11
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
#12
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/29104267/acaricidal-activity-and-synergistic-effect-of-thyme-oil-constituents-against-carmine-spider-mite-tetranychus-cinnabarinus-boisduval
#13
Lipeng Wu, Xin Huo, Xiaolong Zhou, Duoyong Zhao, Weizhong He, Shenghong Liu, Hejiang Liu, Ting Feng, Cheng Wang
Studies examining the use of essential oils as replacements for synthetic insecticides require an understanding of the contribution of each constituent present, interactions among these components, and how they relate to overall toxicity. In the present study, the chemical composition of commercial thyme oil was identified by gas chromatography-mass spectrometry. Thyme oil and blends of its major constituents were tested for their acaricidal activitities against carmine spider mites (Tetranychus cinnabarinus (Boisduval)) using a slide-dip bioassay...
November 1, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
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
#14
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
#15
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
#16
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
#17
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
#18
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
https://www.readbyqxmd.com/read/28981670/antioxidant-protection-by-astaxanthin-in-the-citrus-red-mite-acari-tetranychidae
#19
Makoto Atarashi, Yuki Manabe, Hidenari Kishimoto, Tatsuya Sugawara, Masahiro Osakabe
Solar ultraviolet-B (UVB) radiation and radiant heat have lethal effects on plant-dwelling mites, including spider mites, and their natural enemies, such as phytoseiid mites, leading them to reside on lower leaf surfaces. Panonychus spider mites are outcompeted by Tetranychus spider mites and thus exploit upper leaf surfaces, where they are exposed to both UVB radiation and radiant heat. Panonychus spider mites are thought to produce astaxanthin constitutionally. In this study, we compared carotenoid components, antioxidant capacity, lipid peroxidation, survival, and egg production in wild-type (WTS) and albino-type strains (ATS) of Panonychus citri (McGregor)...
October 1, 2017: Environmental Entomology
https://www.readbyqxmd.com/read/28962002/toxicity-of-three-acaricides-to-the-predatory-mite-neoseiulus-bicaudus-acari-phytoseiidae-and-their-impact-on-the-functional-response-to-tetranychus-turkestani-acari-tetranychidae
#20
Xiu-Qin Shen, Yan-Nan Zhang, Ting Li, Jue-Ying-Qi Jiang, Jian-Ping Zhang
The use of chemical pesticides particularly acaricides can reduce the control efficacy of natural enemies. The objectives of this study were 1) to evaluate the toxicity of three acaricides to the phytoseiid mite Neoseiulus bicaudus (Acari: Phytoseiidae) by spraying acaricides on N. bicaudus adult females and 2) to determine the effect of these acaricides on the functional response of different stages of N. bicaudus to the prey Tetranychus turkestani Ugarov & Nikolski (Acari: Tetranychidae). The results indicated that the survivability of N...
September 1, 2017: Journal of Economic Entomology
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