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Showing 1 to 20 of 34 for “"Permethrin"”.
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Immune Function Determination in Mice Dermally Exposed to Permethrin
… topical exposure to the pyrethroid insecticide, permethrin (formerly not considered an immunotoxicant). Permethrin was applied to the shaved dorsal interscapular region of C57Bl/6N mice at doses of 0.5, 1.5, or 5.0 μl/day. The highest of these doses was approximately equal to 215 μg/kg/day, which …
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Analyses, persistence an degradation of the synthetic pyrethroid insecticides permethrin and fenvalerate
… of the synthetic pyrethroid insecticides, permethrin and fenvalerate, were carried out under natural environmental conditions of the Niagara Peninsula. Permethrin and fenvalerate were treated on apple foliage atrat~s of 0.21 kg(AI)!ha and 0.14 kg(AI)/ha, respectively. The initial cis- and …
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Immunotoxic and Oxidative Effects of Endosulfan and Permethrin on Murine SPlenocytes, in vitro
… mouse splenocytes, in vitro, were exposed to permethrin and endosulfan, individually and in-combination (25-200 µM). The immunotoxic potential of these pesticides was monitored using a flow cytometric technique in combination with 7-Amino Actinomycin D (7-AAD) staining. Endosulfan exposures …
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Immunotoxic Effects of Mixtures of Endosulfan and Permethrin Via Caspase Dependent Thymocyte Apoptosis
… the effect of the insecticides endosulfan, permethrin and their mixtures on C57/BL6 male mice thymocytes in vitro and to ascertain the mechanism by which these effects take place. Permethrin, a broad-spectrum synthetic pyrethroid, is a widely used insecticide in agriculture and public …
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Immunotoxicity of Dermal Permethrin and Cis-Urocanic Acid: Effects of Chemical Mixtures in Environmental Health
… co-exposure to the immunotoxic insecticide permethrin. A single exposure to cUCA caused diminished splenic macrophage phagocytosis that was persistent up to 30 days post-exposure. Five-day exposure to cUCA subtly increased splenocyte proliferation in response to the T cell mitogen …
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Bioakkumulation von Triclosan bei verschiedenen pH-Werten des Wassers und der Pyrethroide Cyfluthrin, Cypermethrin, Deltamethrin und Permethrin
… des Wassers. Für die Pyrethroide Cyfluthrin, Cypermethrin, Deltamethrin und Permethrin, sehr lipophile Substanzen, die als Insektizide Verwendung finden, wurden BCF-Werte an juvenilen Regenbogenforellen im Durchflußsystem bestimmt. Dabei resultierten BCF-Werte zwischen 860 und 2200, bezogen auf …
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The synthetic pyrethroid Ectiban permethrin as a treatment in the pest management of flies in caged-layer poultry houses
… was to evaluate the synthetic pyrethroid permethrin (Ectibantm permethrin, ICI, Americas, Inc.) (Fig. 1) as a potential treatment in the integrated control of synanthropic flies in poultry houses. I used a variety of application techniques including feed additive, direct topical …
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Penetration and permanence of an organophosphate and a pyrethroid in structural wood for insect control
… concentrations. Similar studies with 0.5% permethrin [(3-phenoxypheny]) methyl] (+) - cis, trans-3-(2,2-dichloroethenyl)-2,2dimethylcyclopropane-carboxylate] applied to the same wood types revealed comparable penetration differentials between types of wood. Formulation differences had …
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Biology and control of the lesser mealworm: Alphitobius diaperinus, a structural pest in poultry houses
… density tested. Wettable powder formulations of permethrin and carbaryl when sprayed upon styrofoam were comparable in residual activity. Residual activity of both compounds was less when applied to unpainted plywood. The emulsifiable concentrate formulation of permethrin proved to be …
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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
… 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 dispersal response. A greenhouse experiment was conducted to …
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Immunotoxicity of Pesticide Mixtures and the Role of Oxidative Stress
… were exposed to lindane, malathion, and permethrin, either separately or in mixtures of two pesticides, in concentrations ranging from 37.5 uM to 1mM. These exposures caused both apoptotic and necrotic cell death in thymocytes as evaluated by 7-aminoactinomycin-D, Annexin-V/PI, and …
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Regulatory mechanisms involved in the control of <i>CYP6M2</i> gene in insecticide resistant <i>Anopheles gambiae</i> (Diptera: culicidae)
… gene, are involved in the detoxification of permethrin. Some of these genes are regulated by <i>CnCC / dKeap</i> 1 and Spineless / <i>Tango </i>in <i>Drosophila melanogaster</i>. This mechanism is yet to be identified in <i>Anopheles gambiae</i>. Thus, we examine whether there is differential …
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Antibiotic resistant and xenobiotic degrading bacteria that shape the microbiota of the vectors Aedes aegypti & Culicoides sonorensis
… insecticides such as synthetic pyrethroids like permethrin; however, the development of insecticide resistance has rendered this measure insufficient to control the spread of vectors and their diseases. The new age approach to vector control, microbiota manipulation, has shown promising results, …
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Resistance evaluation and management of Colorado potato beetle, Leptinotarsa decemlineata (Say), using novel chemistries
… assays to determine current susceptibility to permethrin and oxamyl. The toxicity assays indicated an increase in toxicity to permethrin in L. decemlineata larvae (LC50 = 3.931 g ai/L) and an increase in toxicity to oxamyl in adult beetles (LC50 = 9.695 g ai/L) compared with LC50 values …
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What is the best chemical approach to estimate the bioavailability of pyrethroid insecticides to benthic invertebrates?
… predict the bioavailability of two pyrethroids (permethrin and bifenthrin) (Chapter 3); Developing bioavailability-based toxicity endpoints for bifenthrin using two aquatic species (Chapter 4); and, Validating these techniques using sediments from known contaminated field sites (Chapter 5). …
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Comparative studies of the microbial composition and diversity of container-dwelling mosquitoes
… larvae to sublethal concentrations of atrazine, permethrin, and malathion affects the composition and diversity of mosquito gut microbiota. Bacterial community composition differed according to sample type (larval stage vs. adult stage vs. water sample), but not by pesticide treatment. Bacterial …
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Entwicklung eines Enzymimmunoassays zum Nachweis von Permethrinsäure [(1RS)-trans-3-(2,2-Dichlorvinyl)-2,2-dimethyl-cyclopropancarbonsäure] in Urin
… als Nachweisverfahren für die Bestimmung von Permethrinsäure in menschlichem Urin entwickelt. Permethrinsäure ist ein Metabolit der meistverwendeten Pyrethroide Cypermethrin, Cyfluthrin und Permethrin. Beschrieben werden die Herstellung geeigneter Antigene, die Immunisierung, die Gewinnung und …
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Pesticides and pesticide combinations on brain neurochemistry
… only as adults. We studied the effects of permethrin (PR) (a pyrethroid type I) and endosulfan (EN) (an organochlorine) on the levels of catecholamines, indolamines, acetylcholinesterase, lipid peroxidation and α-synuclein in the brain of mice. These pesticides have different structures but …
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Molecular characterization and functional analysis of cytochrome P450 genes in the yellow fever mosquito Aedes aegypti (Diptera: Culicidae)
… to each of three pyrethroid insecticides (permethrin, cypermethrin and deltamethrin) resulted in either down or up-regulation of these transcripts. Functional analyses of the selected P450 transcripts were conducted by using RNA interference (RNAi) followed by insecticide bioassay. RNAi was …
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Inheritance of resistance to selected pyrethroid insecticides in <i>Blattella germanica</i> (Dictyoptera: Blattellidae)
Four insecticides, cypermethrin, fenvalerate, permethrin and phenothrin were employed to study the inheritance of resistance to pyrethroid insecticides in the Seasons strain of <i>Blattella germanica</i>. This resistance was found to be an autosomal, probably monofactorial character, not linked …
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