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Showing 1 to 20 of 23 for “"Tetranychus urticae"”.
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Spatial Ecology and Remote Sensing in the Precision Management of Tetranychus urticae (Acari: Tetranychidae)in Peanut
The twospotted spider mite (TSSM), Tetranychus urticae Koch, is a common polyphagous pest in peanut agroecosystems. The mite has caused serious economic losses to peanut farmers in the Virginia-Carolina area, where approximately 20% of the peanuts are produced annually in the United States. Peanut …
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Appendage development and early Distal-less regulation in arthropods: A study of the chelicerate Tetranychus urticae (Acarida)
… widely disparate chelicerate, the spider mite Tetranychus urticae – interpreting new data with that available for other arthropods. Having made a detailed study of spider mite embryonic (and post-embryonic) development, to provide a basis for understanding mRNA transcription and protein …
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Influence of light conditions on the dynamics of Tetranychus urticae and its control by the predatory mite Neoseiulus californicus
… on the dynamics of the two-spotted spider mite (Tetranychus urticae) and its control by the predatory mite Neoseiulus californicus. Three light treatments were applied: natural light, 12h LED light and 12h dark, and continuous 24h LED light. Spider mite and predator densities were monitored twice …
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Sex-specific aging in two-spotted spider mite Tetranychus urticae: Effects of diet, social environment and predator-induced stress
… address these questions, I employed spider mite Tetranychus urticaeas my model organism, along with its specialist predator Phytoseiulus persimilis to generate predator-induced stress. The life-history traits (e.g. survival rate, adult lifespan and reproductive parameters) were compared between …
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Using selected acaricides to manipulate Tetranychus urticae Koch populations in order to enhance biological control provided by phytoseiid mites
The twospotted spider mite, Tetranychus urticae Koch, is a serious pest of many ornamental plants (Johnson and Lyon, 1991). Pesticide resistance, the high cost of pesticides and loss of production time have raised interest by growers to introduce predatory phytoseiid mites to manage twospotted …
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Oviposition and dispersal responses of the two spotted spider mite Tetranychus urticae Koch (Acari: Tetranychidae) to fenvalerate and permethrin residues in soybeans Glycine max (L) Merrill
Laboratory experiments were conducted to evaluate Tetranychus urticae Koch dispersal response to fenvalerate and permethrin. A petri dish spider mite trap which allows the partitioning of the dispersal response into spindown and walkoff categories was developed. Fenvalerate induced the more severe …
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Interaction of tomato plants infected by the nematode Meloidogyne javanica on aboveground herbivore Tetranychus urticae and on behaviour of its predator Phytoseiulus macropilis
… javanica on the performance of the herbivore Tetranychus urticae in tomato plants and, subsequently, whether the nematode infestation affectedthe behavior of its predator Phytoseiulus macropilis. In the first experiment with the herbivore, tomato plants were infested with 2,000 eggs of the …
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Toxicity of selected acaricides on Tetranychus urticae Koch (Tetranychidae: Acari) and Orius insidiosus Say (Hemiptera: Anthocoridae) life stages and predation studies with Orius insidiosus
Most management tactics for Tetranychus urticae (TSSM) rely upon applying acaricides. Multiple applications are required, which impact natural enemies. Growers will benefit from a more complete understanding of acaricide toxicity. My objectives were to determine: 1.) stage-specific direct and …
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Análisis de la interacción de acaricidas de nueva generación con los agentes de control biológico Typhlodromus pyri (Acari: Phytoseiidae) y Beauveria Bastiana (Hypocreales: Clavicipitaceae) para su correcta incorporacion al Manejo Integrado de Tetranychus urticae (Acari: Tetranychidae)
… el control de huevos y larvas del acaro fitofago Tetranychus urticae. En relación con T. pyri, se han planteado cuatro tipos de bioensayos con el fin de evaluar los efectos de estos acaricidas sobre la mortalidad y la fecundidad de las hembras adultas, sobre la fertilidad de sus huevos, y sobre su …
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ANALYSIS OF VARIATIONS IN SUSCEPTIBILITY AND TRANSCRIPTOME RESPONSES IN TOMATO TO TWO-SPOTTED SPIDER MITE FEEDING
The two-spotted spider mite (Tetranychus urticae Koch) is a pest of tomatoes (Solarium lycopersicum) worldwide. The aim of this study was to generate data for comparison of spider mite resistant and susceptible tomato cultivar transcriptiome responses to mite feeding. Cultivars were screened for …
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Gas exchange characteristics of apple and peach leaves as influenced by European red mite and twospotted spider mite
… Koch) and twospotted spider mite (TSM) (<i>Tetranychus urticae</i> (Koch)) were maintained on greenhouse-grown 'Imperial Delicious' apple (<i>Malus domestica</i>) and 'Redhaven' peach (<i>Prunus persica</i>) leaves. As ERM- and TSM-days increased, apple leaf net photosynthesis (Pn), …
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Thermal biology and behaviour of two predatory Phytoseiid mites: Amblyseius swirskii (Athias-Henriot) (Acari:Phytoseiidae) and Phytoseiulus longipes (Evans) (Acari:Phytoseiidae)
… control agents for the horticultural pest Tetranychus urticae. This study applies a standardised protocol to evaluate the risk of establishment of introduced species and investigates temperature related behavioural thresholds for all three species. Laboratory results demonstrate a low level …
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Insect pest management in hemp in Virginia
… that cannabis aphid, twospotted spider mite (Tetranychus urticae Koch) (Acari: Tetranychidae), and hemp russet mite (Aculops cannabicola [Farkas]) (Acari: Eriophyidae) would likely cause production issues. Very little is known about the impact of insect defoliation in hemp so studies were …
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Key role and diversity of EcR/USP and other nuclear receptors in selected Arthropoda species
… and the chelicerate two-spotted spidermite Tetranychus urticae as representatives of their respective clades. The main research questions that were addressed in the PhD thesis were: (1) Do holometabolic, hemimetabolic and non-insect arthropods exhibit important differences in their sets of …
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Thermal biology and establishment potential of two non-native candidate biological control agents, Nesidiocoris tenuis Reuter (Hemiptera: Miridae) and Lysiphlebus testaceipes (Cresson) (Hymenoptera: Braconidae, Aphidiinae), in the U.K.
… profile to the two-spotted spider mite \(Tetranychus\) \(urticae\) Koch (Acari: Tetranychidae). \(Lysiphlebus\) \(testaceipes\)demonstrated a greater ability to tolerate cold than \(N.\) \(tenuis\) but there was no indication of ability to diapause. With a developmental threshold of 5.8°C, …
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Establishment potential of non-native glasshouse biological control agents, with emphasis on 'Typhlodromips montdorensis' (Schicha) (Acari: Phytoseiidae) in the UK
… when given a mixed diet, showed a preference for Tetranychus urticae over their phytoseiid prey. Neoseiulus californicus showed a preference for T. urticae over T. montdorensis, whereas the latter species showed no preference between T. urticae and N. californicus. This work has identified a …
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Avaliação do potencial biológico de óleos essenciais e extratos orgânicos de folhas de Indigofera suffruticosa
… do óleo essencial por fumigação sobre o Tetranychus urticae, e exibiu uma LC50 de 0.90 μL L-1 de ar, bem como, a sua atividade antimicrobiana e potencial citotóxico contra cinco linhagens de células cancerígenas humanas. Além disso, foram também obtidos dados de atividade antimicrobiana …
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Leptothrips mali (Fitch): a potentially important predator in Virginia apple orchards
… the following orchard pests: A. schlechtendali, Tetranychus urticae, Lecanium corni, and on the eggs of Laspeyresia pomonella and Platynota flavedana. No feeding was observed on S. punctum, but L. mali fed on the phytoseiid mite, Proprioseius oudemansi. The functional response of all feeding …
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Contribución al desarrollo de estrategias de manejo integrado de plagas de la vid
… importantes plagas de la vid: Lobesia botrana, Eotetranychus carpini y Tetranychus urticae. En concreto, se desarrollaron bioensayos con caolín, flufenoxurón y spirodiclofén. Por otro lado, se llevaron a cabo investigaciones encaminadas a evaluar efectos secundarios del caolín sobre el parasitoide …
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Indagine sul determinismo genetico per la tolleranza agli stress biotici in limone combinando approcci genetici e istologici
… stata naturalmente attaccata dal ragnetto rosso (Tetranychus urticae Koch), un acaro fitofago molto dannoso e di difficile controllo, e ha mostrato un'ampia gamma di sintomi nell’ambito dei diversi genotipi che la costituiscono, è stato considerato anche lo studio della risposta delle piante …
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