1,721,042 research outputs found
Estudio de la composición acídica de los lípidos de depósito y de diversos órganos de los Dasipodidos Chaetophractus Villosus ("Peludo") y Dasypus Septemcintus ("Mulita")
Full text linkFil: Zerba, Eduardo Nicolás. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina
Estudio de la composición acídica de los lípidos de depósito y de diversos órganos de los Dasipodidos Chaetophractus Villosus ("Peludo") y Dasypus Septemcintus ("Mulita")
No full textFil: Zerba, Eduardo Nicolás. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina
Rhodnius prolixus intoxicated
Full text linkRhodnius prolixus (Hemiptera: Reduviidae) is a hematophagous insect native from South America. By the end of the 20th century, it was one of the main vectors of Chagas disease in Venezuela, Colombia several Central American countries and southern Mexico. The aim of the present article is to review the literature regarding R. prolixus toxicology. British entomologist Vincent B. Wigglesworth carried out the first studies on this subject over seventy years ago. A wide bibliographical search allowed to locate one hundred and thirty scientific articles describing the effects of different insecticides on R. prolixus. About one-third of these articles report the acute toxicity and/or sublethal effects produced by the main synthetic neurotoxic families of insecticides (organochlorines, organophosphates, carbamates and pyrethroids). Only a couple of these studies have regarded the toxicokinetics or toxicodynamics of these insecticides. Insect growth or development disruptors, such as juvenoids, chitin synthesis inhibitors, precocenes, azadirachtin and lignoids, have been thoroughly studied in R. prolixus. Important aspects on the mode of action of ureases were also described in this species. By the end of the 1960?s, resistance to insecticides was detected in R. prolixus from Venezuela. Some years later, the existence of pyrethroid-resistant individuals was also reported. Control programmes for R. prolixus in countries where Chagas is endemic have only used synthetic neurotoxic insecticides. In 2011, Central America and southern Mexico were declared free of this insect. The recent sequencing of the R. prolixus genome will provide valuable information to understand the molecular basis of insecticide resistance in this species.Fil: Alzogaray, Raúl Adolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Investigación y Desarrollo Estratégico para la Defensa. Ministerio de Defensa. Unidad de Investigación y Desarrollo Estratégico para la Defensa; ArgentinaFil: Zerba, Eduardo Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Investigación y Desarrollo Estratégico para la Defensa. Ministerio de Defensa. Unidad de Investigación y Desarrollo Estratégico para la Defensa; Argentin
Ovitrampas Letales conteniendo al larvicida pyriproxyfen para el control de Aedes aegypti
No full textLas ovitrampas (recipientes utilizados en programas de control donde las hembras grávidas de mosquitos oviponen), son ampliamente utilizadas en tareas de monitoreo de poblaciones de mosquitos. Asimismo, con la incorporación de un principio activo, han sido utilizadas con fines de control poblacional de mosquitos como una herramienta de muy bajo impacto ambiental. Pueden ser parte de estrategias de manejo integrado de los vectores de dengue, interrumpiendo su desarrollo larvario acuático. A este tipo de recipiente que tiene la propiedad de eliminar las larvas o impedir que los mosquitos adultos emerjan se lo conoce como ovitrampa letal o autocida.Fil: Seccacini, Emilia Ana. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Juan, Laura Wilma. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Zerba, Eduardo Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Licastro, Susana Mónica. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin
Comparison of three types of traps baited with sexual pheromones for ambrosia beetle megaplatypus mutatus (coleoptera: Platypodinae) in poplar plantations
Full text linkMegaplatypus mutatus (Coleoptera: Platypodinae) is an ambrosia beetle native to South America that only attacks standing five trees and is a serious problem for commercial poplar (Populus L.; Salicaceae) plantations in Argentina. The development of traps baited with synthetic pheromones that can be used for monitoring M. mutatus in infested poplar plantations is an important goal in preventive programs. Pioneer male M. mutatus emit a pheromone composed mainly by (+)-sulcatol and sulcatone. In the current study, we tested their release rates from several polymeric reservoir systems, to develop and manufacture a pheromone-releasing device. The efficacy of three different types of traps was evaluated in the field. Single funnel traps equipped with cross-vanes (CIPEIN-CV) captured significantly more insects than multiple funnel traps (LINDGREN) and simple funnel traps (CIPEIN-F).Fil: Funes, Hernán Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Científicas y Técnicas para la Defensa. Centro de Investigación de Plagas e Insecticidas; ArgentinaFil: Zerba, Eduardo Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Científicas y Técnicas para la Defensa. Centro de Investigación de Plagas e Insecticidas; Argentina. Universidad Nacional de San Martín; ArgentinaFil: Gonzalez Audino, Paola Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Científicas y Técnicas para la Defensa. Centro de Investigación de Plagas e Insecticidas; Argentina. Universidad Nacional de San Martín; Argentin
Toxicological interactions in insects exposed to simple mixtures containing botanical monoterpenes and conventional insecticides
No full textDue to its low toxicity in mammals and very low environmental impact, some botanical monoterpenes with insecticidal activity are an attractive alternative to conventional insecticides. There is extensive literature on the insecticidal activity of individual monoterpenes, but very few studies about toxicity of simple mixtures containing monoterpenes (2-4 components) or monoterpenes and conventional insecticides (organophosphorus, carbamates, pyrethroids, neonicotinoids). Additive, antagonistic and synergistic interactions have been reported for such a mixtures when applied on several insect pest species. The identification of monoterpenes that increase the toxicity of conventional insecticides has a potential practical application. It could be the first step towards the development of products to control pests by applying lower doses of such insecticides.Fil: Reynoso, Mercedes M. N.. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Investigación y Desarrollo Estratégico para la Defensa. Ministerio de Defensa. Unidad de Investigación y Desarrollo Estratégico para la Defensa; Argentina. Ministerio de Defensa. Instituto de Investigaciones Científicas y Técnicas para la Defensa; Argentina. Universidad Nacional de San Martín; ArgentinaFil: Zerba, Eduardo Nicolás. Universidad Nacional de San Martín; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Alzogaray, Raúl Adolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Investigación y Desarrollo Estratégico para la Defensa. Ministerio de Defensa. Unidad de Investigación y Desarrollo Estratégico para la Defensa; Argentina. Ministerio de Defensa. Instituto de Investigaciones Científicas y Técnicas para la Defensa; Argentina. Universidad Nacional de San Martín; Argentin
Evidence of Pyrethroid Resistance in Eggs of Pediculus humanus capitis (Phthiraptera: Pediculidae) from Argentina
Full text linkInsecticide resistance in Pediculus humanus capitis De Geer 1778 (Phthiraptera: Pediculidae) from different countries has been well documented in the last years. Otherwise, scarce research was reported about insecticide resistance in insect embryos and none in human louse embryos. In this work we studied the insecticide resistance in eggs of three head lice populations whose pyrethroid resistance was demonstrated in adults and nymphs, compared to a susceptible laboratory body louse strain. All head louse populations showed high permethrin resistance in eggs. Levels of permethrin resistance (LCR) assessed in eggs by immersion technique, were higher than those previously reported for the corresponding populations of adults by topical application. Comparison of LCR values for different populations demonstrated that there was a direct relationship between the resistance levels assessed in eggs and those in adults. All permethrin resistant eggs showed high resistance to d-phenothrin and DDT, and low resistance to carbaryl, in common with the resistance profile established for adults and nymphs. The results concerning the high resistance to pyrethroid (permethrin and d.phenothrin) and the cross-resistance to DDT and carbaryl detected in head louse eggs and adults, suggested similar resistance mechanisms in eggs and adults of head louse populations from adults.Fil: Mougabure Cueto, Gastón Adolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Científicas y Técnicas para la Defensa. Centro de Investigación de Plagas e Insecticidas; ArgentinaFil: Zerba, Eduardo Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Científicas y Técnicas para la Defensa. Centro de Investigación de Plagas e Insecticidas; Argentina. Universidad Nacional de San Martín; ArgentinaFil: Picollo, Maria Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Científicas y Técnicas para la Defensa. Centro de Investigación de Plagas e Insecticidas; Argentin
Toxicity to vapor exposure and topical application of essential oils and monoterpenes on musca domestica (Diptera: Muscidae)
Full text linkThe medical and veterinary pest Musca domestica L. has developed resistance to most insecticides used against it. For this reason, there is a constant search for new alternative control tools. The aims of this study were (1) to evaluate the toxicological effects caused by the fumigant activity and the topical application of five essential oils and five monoterpenes in M.domestica adult males and (2) to study the variation of the fumigant activity of the essential oils and monoterpenes according to the solvent used (acetone or a silicone base). Houses flies were exposed to vapors delivered by filter paper treated with 200 μI of essential oil or monoterpene (10%) in acetone or a silicone base. The knockdown time 50% (KT50) values obtained for essential oils (expressed in minutes) were 3.3 (eucalyptus); 10.1 (orange); 10.4 (mint); 10.9 (lavender); and 17.7 (geranium). The KT50 values obtained for monoterpenes (expressed in minutes) were 2.3 (eucalyptol); 7.5 (limonene); 7.6 (lina-lool); 19.0 (menthone); and 22.6 (menthyl acetate). In all cases, a delay in the onset of poisoning symptoms was observed when a silicone base vehicle was used. When topically applied, the lethal dose 50% (LD 50) values for essential oils (expressed in micrograms of oil/insect) were 0.07 (geranium); 0.09 (mint); 0.13 (lavender); 0.14 (eucalyptus); and 0.16 (orange). The LD50 values for monoterpenes (expressed in micrograms of monoterpene/insect) were 0.04 (linalool); 0.09 (menthyl acetate); 0.10 (limonene); 0.11 (menthone); and 0.13 (eucalyptol). These results suggest that the studied essential. oils and monoterpenes are potential tools for controlling M. domestica.Fil: Tarelli, Guillermo. Chemotecnica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Zerba, Eduardo Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Científicas y Técnicas para la Defensa. Centro de Investigación de Plagas e Insecticidas; Argentina. Universidad Nacional de San Martín; ArgentinaFil: Alzogaray, Raúl Adolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Científicas y Técnicas para la Defensa. Centro de Investigación de Plagas e Insecticidas; Argentina. Universidad Nacional de San Martín; Argentin
New trap for emergent Megaplatypus mutatus
Get PDFMegaplatypus mutatus (= Platypus mutatus) (Chapuis), an ambrosia beetle (Coleoptera: Platypodidae) native to South America, is a forest pest that attacks live standing trees, affecting commercial poplar and other broadleaf plantations. Traditionally, single-chambered emergence traps have been used to collect live beetles for field and laboratory studies. However, the lack of separation in these chambers results in antagonistic interactions between individuals. Wounded M. mutatus are incapable of successful reproduction and are of little value in physiological and behavioral experiments. We introduce a new, multiple-chambered trap that isolates individual insects until collection, thus increasing the number of uninjured and fully functional insects available for physiological and behavioral experiments.Megaplatypus mutatus (= Platypus mutatus) (Chapuis), un scolyte ambrosia (Coleoptera: Platypodidae) indigène d’Amérique du Sud, est un ravageur qui attaque les arbres vivants sur pied, ce qui affecte les plantations commerciales de peupliers et d’autres essences à feuilles larges. Pour les études de terrain et de laboratoire, on récolte généralement les insectes vivants à l’aide de pièges d’émergence comprenant une seule cellule. Cependant, l’absence de séparation dans ces cellules permet des interactions agonistes entre les individus. Les M. mutatus blessés sont incapables de se reproduire avec succès et sont de peu d’utilité pour les expériences de physiologie et de comportement. Dans notre étude, nous avons mis au point un nouveau piège à cellules multiples qui isole les individus jusqu’au moment de la récolte, ce qui fournit un nombre plus élevé d’insectes sains et complètement fonctionnels pour les expériences physiologiques et comportementales.Fil: Gatti Liguori, Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Científicas y Técnicas para la Defensa. Centro de Investigación de Plagas e Insecticidas; ArgentinaFil: Zerba, Eduardo Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Científicas y Técnicas para la Defensa. Centro de Investigación de Plagas e Insecticidas; ArgentinaFil: Gonzalez Audino, Paola Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Científicas y Técnicas para la Defensa. Centro de Investigación de Plagas e Insecticidas; Argentin
Identification of Volatile Emissions from Platypus mutatus (=sulcatus) (Coleoptera: Platypodidae) and Their Behavioral Activity
Full text linkWe report here the identification and biological activity of volatile compounds emitted by male Platypus mutatus (=sulcatus) Chapuis while boring galleries in living Poplar (Populus deltoides) trees. Headspace analysis using SPME (Solid Phase Microextraction) techniques showed the presence of 6-methyl-5-hepten-2-ol (sulcatol) and 6-methyl-5-hepten-2-one (sulcatone). Only one enantiomer of sulcatol, retusol, was found to be part of the volatile emission. Behavioral assays showed that females are more attracted than males to galleries with boring males inside. Both sulcatol and sulcatone elicited electroantennographical responses by female P. mutatus. Furthermore, behavioral bioassays showed that both sulcatol and sulcatone elicit behaviorally attractive response by females. These results suggest that male P. mutatus releases a sexual pheromone composed mainly of retusol and sulcatone.Fil: Gonzalez Audino, Paola Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Científicas y Técnicas para la Defensa. Centro de Investigación de Plagas e Insecticidas; ArgentinaFil: Villaverde, Raul. Universidad Nacional de La Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Científicas y Técnicas para la Defensa. Centro de Investigación de Plagas e Insecticidas; ArgentinaFil: Alfaro, Rene. Pacific Forestry Centre; Canadá. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Científicas y Técnicas para la Defensa. Centro de Investigación de Plagas e Insecticidas; ArgentinaFil: Zerba, Eduardo Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Científicas y Técnicas para la Defensa. Centro de Investigación de Plagas e Insecticidas; Argentin
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