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1.
Cienc. Serv. Salud Nutr ; 10(2): 30-43, nov. 2019.
Article in Spanish | LILACS | ID: biblio-1103584

ABSTRACT

Introducción: la rosácea es una enfermedad inflamatoria crónica de etiología desconocida que se presenta con eritema centro facial permanente, con episodios transitorios de intensificación asociados a factores desencadenantes unido a otros síntomas y signos variados. Tiene diferentes formas clínicas, es de difícil manejo y por ello, aunque existen diferentes tratamientos, aún es válido continuar la búsqueda de otras alternativas terapéuticas. Objetivo: determinar eficacia del metronidazol gel 0.75%, permetrina crema 5%, y la combinación de ambos medicamentos en pacientes con rosácea facial tratados en el Hospital Fajardo en el período 2016 a 2017. Método: se realizó un estudio de intervención cuasi-experimental, abierto, longitudinal, aleatorizado con tres grupos de 30 pacientes, que recibieron tratamiento durante 3 meses, y fueron evaluados un mes después de terminar el tratamiento. Resultados: predominaron las mujeres, el fototipo cutáneo III, con piel grasa. La mejor respuesta terapéutica fue la asociación de ambos medicamentos con un 100% con respuesta satisfactoria, seguida de 92.9% con la permetrina y 79.3% con el metronidazol. Conclusiones: La respuesta terapéutica en la mayoría de los 3 grupos fue satisfactoria, aunque predominó la combinación de ambos medicamentos. Las reacciones adversas fueron leves y escasas.


Subject(s)
Humans , Female , Adolescent , Adult , Rosacea , Permethrin , Metronidazole , Pharmaceutical Preparations
2.
Int. j. med. surg. sci. (Print) ; 3(3): 919-925, sept. 2016. ilus
Article in Spanish | LILACS | ID: biblio-1087594

ABSTRACT

La dermatoparasitosis producida por el acaro Sarcoptes scabiei variedad hominis, presenta una distribución poblacional relacionada al hacinamiento, condiciones higiénicas deficientes, pobreza y características geoclimáticas. El contagio ocurre de forma directa cutánea o a través de fómites. Liquiñe,poblado fronterizo de la Región de los Ríos, Chile, presenta en gran parte de su población las características mencionadas, con difícil acceso a comunicación digital y derivación médica. La incidencia de sarna se ve modificada al realizar intervenciones educacionales y saneamiento local, tanto como el diagnostico precoz y el tratamiento oportuno logran una modificación sustancial de la prevalencia. Se presenta el reporte de un caso. Paciente sexo femenino, 33 años, que presenta lesiones por grataje, excoriadas, con pápulo-pústulas de dos años de evolución, con manejo inicial sintomático por diagnóstico de dermatitis y psoriasis sin mejora de las lesiones. Conjuntamente se identifica en la hija de 4 años, lesiones primarias de características similares a las iniciales. Las lesiones de la menor se presentan como vesículas en espacio interdigital, muñe-cas, región periumbilical y surco acarino, compatibles con sarna. Se inicia tratamiento tópico permetrina 5 %a toda la familia, basados en las recomendaciones de la guía de manejo MINSAL. Se logra tras 2 años de evolución regresión total de los signos y síntomas a los 2 meses de iniciada la terapia. La presente revisión de caso pretende reforzar las ideas de diagnóstico precoz, tanto de caso índice como de probables contactos,educación continua a la comunidad. Tratamiento efectivo y oportuno, adecuado a la realidad socio cultural década localidad, tomando en cuenta factores de riesgos para la presentación y el abandono de la terapia. Asimismo promover las redes institucionales para la distribución de tratamiento, asesoramiento por especialistas y conocimientos actualizados de la semiología de cada cuadro dermatológico por el médico general.


The dermato parasitosis producedby the Sarcoptes scabiei mite hominis variety, has apopulation distribution related to over crowding, poor sanitation, poverty and geo-climatic characteristics.Transmission occurs directly through skin or fomites.In the border town of Liquiñe in the Region de los Rios,Chile, a substantial amount of the population is subject to the above characteristics, with difficult access to digital communication and medical referrals. The incidence of scabies is modified through educational interventions, and local sanitation, as well as early diag-nosis and timely treatment thus achieving a substantial change in prevalence. A case report is presented. Female patient, 33 years old presents with excoriated crusted lesions, with papules and pustules following two years of development, initial symptomatic management diagnosis of psoriasis and dermatitis,showed no improvement of the lesions. At the same time the 4 year old daughter of the patient presented with primary lesions similar to baseline characteristics.The child ́s lesions presented as vesicles in interdigital space, wrists, periumbilical region and mite grooves compatible with scabies. Permethrin 5% topical treatment was prescribed for the whole family, basedon the recommendations of the MINSAL guide management is initiated. At 2 months of treatment therapy on set, complete recovery was achieved following two years of evolution of signs and symptoms.This case review aims to reinforce the ideas of earlydiagnosis, in both probable index case and contact,and continuing education in the community. Effective and timely treatment, in conjunction with the socio-cultural reality of each community, taking into account risk factors, such as seeking medical treatment and abandoning therapy. Furthermore, it is also intended to promote institutional networks for treatment dissemination, counseling by specialists and updated information for each dermatological presentation for the general medicine physician.


Subject(s)
Humans , Female , Adult , Primary Health Care , Scabies/drug therapy , Ivermectin/therapeutic use , Permethrin/therapeutic use , Poverty , Sarcoptes scabiei , Nuclear Family , Rural Health
3.
Dermatol. pediátr. latinoam. (En línea) ; 10(2): 54-57, jul. 2012. tab, ilus
Article in Spanish | LILACS | ID: lil-742327

ABSTRACT

Introducción: Los ácaros Demodex folliculorum y Demodex brevis son ectoparásitos habituales en la unidad folículo-sebácea de los humanos, fundamentalmente en adultos. En niños inmunocompetentes su presencia es rara. El objetivo de nuestro estudio es describir y caracterizar la demodicidosis en niños. Material y métodos: Se seleccionaron pacientes menores de 15 años con manifestaciones clínicas sugerentes de demodicidosis. El diagnóstico se efectuó mediante la cuantificación de Demodex sp con KOH 30% bajo microscopía de luz. Resultados: Se reclutaron 17 casos, 16 pacientes de sexo femenino, todos con lesiones faciales características. Sólo en 3 pacientes hubo inmunosupresión concomitante. Todos los casos respondieron al tratamiento con permetrina 5% tópica. Conclusión: La demodicidosis infantil puede presentarse en pacientes inmunocompetentes, su diagnóstico requiere un alto índice de sospecha. Se observa una excelente respuesta con permetrina 5% tópica.


Introduction: The mites Demodex folliculorum and Demodex brevis are common ectoparasites in the follicle-sebaceous unit of humans, principally in adults. In immunocompetent children their presence is rare. The aim of our study is to describe and characterize the demodicidosis in children. Materials and methods: Patients under 15 years old with clinical manifestations suggestive of demodicidosis were selected. Diagnosis was made by quantification of Demodex sp with KOH 30% under light microscopy. Results: We found 17 cases, 16 females, all with typical facial lesions. Only 3 patients presented concomitant immunosuppression. All cases responded to topical 5% permethrin treatment. Conclusion: Infantile demodicidosis can occur in immunocompetents patients, and it diagnosis requires a high index of suspicion. An excellent response with topical 5% permethrin is observed.


Subject(s)
Humans , Adolescent , Infant , Child, Preschool , Child , Mite Infestations , Mites , Ectoparasitic Infestations , Permethrin
4.
Rev. cuba. med. trop ; 63(3): 275-277, sep.-dic. 2011.
Article in Spanish | LILACS | ID: lil-615560

ABSTRACT

Introducción: en Cuba se reportaron altas frecuencias de pediculosis capitis desde finales de los años noventa, particularmente en algunos grupos de escolares y sus convivientes. Estos últimos se involucran en la cadena de transmisión de esos insectos y pueden desempeñar, en la actualidad, una función importante como reservorios del parásito. Objetivo: reportar la eficacia del tratamiento con añil cimarrón en una paciente infestada de Pediculus capitis. Métodos: se describe un caso de infestación persistente con pediculosis capitis en una paciente de 55 años de edad, tratada con solución de permetrina 1 por ciento y posteriormente con tintura de añil cimarrón 5 por ciento. Resultados: la identificación microscópica de adultos y estadios pre-adultos del parásito confirmaron la presencia de Pediculus capitis. El tratamiento del cabello con permetrina 1 por ciento no fue eficaz en 2 aplicaciones realizadas. Como alternativa de tratamiento, se aplicó tintura de añil 5 por ciento, lo que permitió disminuir la población de ectoparásitos adultos y logró eliminar la infestación después de una segunda aplicación, con la constante extracción de las liendres realizada por el personal paramédico encargado del caso. Conclusión: la aplicación de este procedimiento inocuo podría servir como alternativa terapéutica para esta afección.


Introduction: pediculosis capitis was very frequently reported in Cuba since the end of the 90's, particularly in some groups of school children and their relatives. The latter are involved in a chain of transmission of these insects and may play an important role at present as parasite reservoirs. Objective: to report on the efficacy of the treatment of one female patient suffering from Pediculus capitis by using 5 percent Indigofera suffruticosa Mill (añil cimarrón) tincture. Methods: a case of persistent infestation with pediculosis capitis was described in which a 55 years-old patient was firstly treated with 1 percent permethrin solution and later with 5 percent Indigofera suffruticosa Mill tincture. Results: the microscopic identification of adult parasites and pre-adult stages of the parasite confirmed the presence of pediculus capitis. The hair treatment with 1 percent permethrin was not effective after two applications. As an alternative, 5 percent Indigofera suffruticosa Mill tincture was used and then the population of adult ectoparasites was reduced and the infestation was eliminated after the second application, with the paramedical staff continuously taking the nits out from the patient's hair. Conclusion: the use of this innocuous method may become a therapeutic alternative to treat this illness.


Subject(s)
Animals , Female , Humans , Middle Aged , Indigofera , Lice Infestations/drug therapy , Pediculus , Phytotherapy , Plant Extracts/administration & dosage , Scalp Dermatoses/drug therapy
5.
Rev. cuba. med. trop ; 63(1): 70-75, ene.-abr. 2011.
Article in Spanish | LILACS | ID: lil-584973

ABSTRACT

INTRODUCCIÓN: en Cuba, al igual que en otros países, la infestación por Pediculus capitis se ha incrementado notablemente a partir de la década de los setenta, por lo que se desarrolla un intenso programa dirigido a su control y prevención, en el cual se incluyen estudios sobre la calidad de la permetrina, que es un piretroide sintético, activo frente a una amplia gama de parásitos, con actividad pediculicida a 1 por ciento y escabicida a 5 por ciento. Dada su baja toxicidad y por responder favorablemente a la relación riesgo/beneficio, constituye uno de los pediculicidas de elección para disminuir la infestación por piojos. OBJETIVO: revalidación de una metódica analítica por cromatografía líquida de alta resolución y su aplicación en la cuantificación de 12 muestras de 2 lotes de loción de permetrina 1 por ciento, de producción nacional. MÉTODOS: los parámetros evaluados fueron linealidad, precisión y exactitud. Se prepararon 7 estándares de calibración y soluciones de trabajo con concentraciones que se encontraban entre 100 y 15 000 µg/mL. Estos parámetros de validación fueron verificados a través del coeficiente de correlación, el coeficiente de variación y el error relativo porcentual. RESULTADOS: la especificidad del método fue corroborada a través de los cromatogramas realizados, en los cuales los tiempos de retención fueron entre 8,8 y 9,2 min para el isómero trans y entre 10,7 y 11,2 min para el isómero cis. El coeficiente de correlación determinado para ambos isómeros fue mayor que 0,99; el coeficiente de variación fue menor que 3 por ciento y el error relativo porcentual estuvo entre -3 y 1 por ciento, tanto para los estudios interdía como intradía. Se determinó que la media de la concentración de permetrina en lotes de solución tópica 1 por ciento resultó de 6 780,14 µg/mL. CONCLUSIONES: el método revalidado fue lineal, preciso y exacto dentro del rango de concentraciones estudiadas. La concentración de permetrina calculada estuvo por debajo de lo esperado según la información de la composición de la solución de permetrina 1 por ciento (9 100-10 900 µg/mL). Este método resulta útil para la cuantificación de solución de permetrina 1 por ciento en los estudios de calidad del producto farmacológico que se distribuye a la población.


INTRODUCTION: in Cuba, as well as in other countries, Pediculus capitis infestation has increased since the 70´s; this is the reason why a program aimed at controlling and preventing this infestation was designed. This program includes quality control studies of the active synthetic pyrethroid Permethrin and its activity at 1 percent on lice and 5 percent on scabies. Due to its low toxicity and positive risk/benefit ratio, Permethrin is a pediculicide of choice to decrease Pediculus capitis infestation. OBJECTIVE: to validate an analytical method using high performance liquid chromatography and its application in the quantification of 12 samples from 2 batches of Cuban-made 1 percent permethrin pediculicidal preparation. METHODS: linearity, precision and accuracy parameters were determined. Seven calibration standards and working solutions with concentrations ranging from 100 to 15 000 µg/mL were prepared. These validation parameters were verified through the correlation coefficient, the variation coefficient and the percentage relative error. RESULTS: the specificity of this method was proved in the chromatograms that showed retention times of 8.8 to 9.2 min for the isomer trans and 10.7 to 11.2 min for the isomer cis. The correlation coefficient for both isomers was higher than 0.99; the variation coefficient was under 3 percent and the percentage relative error was -3 and 1 percent for the inter-day and intraday studies, respectively. The mean permethrin concentration in 1 percent solution batches was estimated at 6 780.14 µg/mL. CONCLUSIONS: the validated method was linear, precise and exact within the range of the studied concentrations. The estimated concentration of permethrin was below the expected rate according to the composition of 1 percent permethrin solution (9 100-10 900 µg/mL). This method may be useful for the quantification of 1 percent permethrin solutions in the quality studies of the product sold to the population.


Subject(s)
Chromatography, High Pressure Liquid , Permethrin/analysis
6.
Rev. cuba. med. trop ; 62(2): 119-124, Mayo-ago. 2010.
Article in Spanish | LILACS | ID: lil-584945

ABSTRACT

INTRODUCCIÓN: la automedicación y el uso de diversos productos como pediculicidas parece ser frecuente entre los convivientes para tratar de eliminar los piojos de la cabeza en los escolares. OBJETIVO: analizar el uso deliberado, por los convivientes con educandos de primaria, de diversos productos para controlar la pediculosis capitis en los niños. MÉTODOS: se realizó una encuesta por cuestionario e intercambio de opiniones con 896 convivientes con niños entre 5 y 10 años, que estudiaban en 19 escuelas urbanas y semiurbanas de primera enseñanza, de las provincias de las zonas occidental, central y oriental de Cuba, sobre los productos utilizados para controlar o eliminar los piojos de la cabeza. RESULTADOS: la población encuestada cita más de 40 productos. Entre las sustancias más reportadas se encuentra el alcohol, el DDT y el lindano, que fueron anteriormente rechazados por su toxicidad e ineficacia. Se reportan en uso productos empleados en la agricultura, la salud pública y la medicina veterinaria para el control de plagas; entre ellos, temephos, esteladón, malathion, parathión, baytex; también derivados del petróleo como el líquido de freno, keroseno y la gasolina. CONCLUSIÓN: en el trabajo se refieren numerosas sustancias tóxicas utilizadas en la terapéutica para el control de Pediculus capitis en niños, cuyo riesgo supera los beneficios esperados. Resulta bajo el porcentaje de personas que utilizan la extracción manual como único tratamiento, no obstante ser el método menos dañino y más eficaz.


INTRODUCTION: self-medication and use of several products as peliculicides seem to be common procedures for those persons living with schoolchildren, in order to eliminate head lice. OBJECTIVE: to analyze the deliberate use of several products by the people living with elementary school children, so as to control their pediculosis capitis. METHODS: a questionnaire- and exchange of opinion-based survey on the products used to control or eliminate head lice was administered to 896 people who lived with children aged 5 to 10 years. These children studied in 19 elementary schools in urban and suburban areas located in the western, central and eastern provinces of Cuba. RESULTS: the surveyed population mentioned more than 40 products. Among the most reported substances were alcohol, DDT and lindano which were previously rejected owing to their toxicity and ineffectiveness. There were also reports on products from agricultural, public health and veterinary medicine, including those devoted to plague control such as temephos, steladon, malathion, parathion, baytex; also oil derivatives like brake fluid, kerosene and gasoline. CONCLUSIONS: the paper mentioned a number of toxic substances used in treating Pediculus capitis in children, the risks of which outweighted the expected benefits. The percentage of persons who manually remove lice from the head as the only treatment is low; however, this is the less harmful and more effective method.


Subject(s)
Animals , Child , Child, Preschool , Humans , Lice Infestations/drug therapy , Pediculus , Scalp Dermatoses/drug therapy , Faculty , Parents , Schools , Surveys and Questionnaires
7.
Rev. cuba. med. trop ; 60(2)mayo-ago. 2008. tab, graf
Article in Spanish | LILACS | ID: lil-506352

ABSTRACT

Introducción: entre los problemas que inciden en los fallos, de los tratamientos pediculicidas, están la forma de aplicación y la baja efectividad de los productos utilizados. Objetivos: conocer, por medio de encuestas de opiniones, la forma de aplicación y la efectividad de la Permetrina 1 por ciento fabricada en Cuba para el control de los piojos. Métodos: los cuestionarios se distribuyeron entre los convivientes con escolares de primaria, que con anterioridad habían utilizado el producto en los niños. El trabajo se realizó de mayo a julio de 2007 en escuelas urbanas y rural-urbanas de las provincias Ciudad de La Habana, Sancti Spíritus y Las Tunas, en Cuba. Resultados: de 786 convivientes encuestados, 637 (81,17 por ciento) no aplicaron el pediculicida según las indicaciones formuladas en el prospecto, que se adjunta al frasco, 579 (73,66 por ciento) la consideran ineficaz y solo 143 (16,32 por ciento) la han utilizado como único tratamiento. Conclusiones: no existe sincronización en los pasos seguidos durante el tratamiento. Se evidencia una alta heterogeneidad en las respuestas, porque más de 70 por ciento de los encuestados la consideran ineficaz para el tratamiento de la pediculosis capitis.


Background: Among the problems that influence on failure of pediculosis treatment is the way of application and low effectiveness of used products. Objectives: to find out, through surveys, the ways of application and the effectiveness of 1 percent permethrin manufactured in Cuba for the control of pediculosis capitis. Methods: the questionnaires were distributed among people living with elementary schoolchildren, who had previously applied the products to children. The study was performed from May to July 2007 in urban and rural-urban schools located in City of Havana, Sancti Spiritus and Las Tunas provinces in Cuba. Results: Seven hundred and eighty six people were surveyed, 637 of them (81,17 percent) did not follow the instructions given in the flask in applying the anti-pediculosis products, 579 (73,66 percent) considered it as ineffective and only 143 (16,32 percent) had used it as unique treatment. Conclusions: there is not any agreement in steps followed by these people during treatment. Responses were very heterogeneous because over 70 of surveyed persons stated that permethrin was ineffective for treatment of pediculosis capitis.


Subject(s)
Humans , Child , Lice Infestations/prevention & control , Lice Infestations/drug therapy , Permethrin/therapeutic use
8.
HU rev ; 34(1): 19-25, jan.-mar. 2008. graf, tab
Article in Portuguese | LILACS | ID: lil-530683

ABSTRACT

Doenças ectoparasitárias como a escabiose, a pediculose, a tungíase e a larva migrans cutânea são epidêmicas em inúmeras comunidades carentes no Brasil e seu controle efetivo é um desafio para a Saúde Pública. Embora a permetrina seja um dos medicamentos aprovados pelo Food and Drug Administration para o tratamento da pediculose, não há um método oficial disponível para a realização do controle da qualidade deste produto em loção capilar de uso humano. Assim, o objetivo deste trabalho foi desenvolver e validar um método analítico sensível, específico, preciso e exato para esta análise, seguindo os critérios descritos na Resolução no 899/2003 da Agência Nacional de Vigilância Sanitária (ANVISA). A cromatografia líquida de alta eficiência (HPLC) com detector diode array (λ = 235nm) foi empregada na determinação de cis-permetrina em loção capilar, visando implementar um sistema de controle da qualidade em laboratórios analíticos. A cis-permetrina e a substância utilizada como padrão interno (PI), o cloridrato de nafazolina, foram separados em coluna analítica S5W (4,6 x 150mm) Waters Spherisorb® e eluídos isocraticamente (fluxo de 1,2mL/min). A cis-permetrina e o PI foram caracterizados pelos tempos de retenção de 1,52 e 8,66 minutos respectivamente. O método mostrou-se linear na faixa de 1,6 a 127,5µg/mL e, nos estudos de precisão intra e interensaio, foram obtidos coeficientes de variação inferiores a 5%, calculados a partir dos resultados. A exatidão média do método foi de 103%. Os limites de detecção e quantificação foram 1,6µg/mL e 2,4µg/mL respectivamente. A cis-permetrina manteve-se estável por 24 horas à temperatura ambiente; por 15 dias a 4ºC e 30 dias a -20ºC. O método mostrou-se simples e apropriado para a determinação de cis-permetrina em loção capilar.


Parasitic skin diseases such as scabies, pediculosis, tungiasis, and cutaneous larva migrans are epidemic in numerous communities in Brazil and their effective control is a major challenge to public health. Permethrim is one of the medications approved by the Food and Drug Administration to treat pediculosis. However, official methods of quality control for permethrin's use as hair lotion are currently unavailable. Thus, a specific and accurate method was validated using high performance liquid chromatography (HPLC) with a diode array detector (λ = 235 nm) in order to determine cis-permethrin in hair lotion, aiming to establish a systemof quality control in analytical laboratories. Cis-permethrin and naphazolinechloride (internal standard - IS) were separated in an analytical S5W column (4.6 x 150 mm) Waters Spherisorb® and isocratically eluted (flow rate =1.2 mL/min). Cis-permethrin and IS were characterized by their retention times: 1.52 and 8.66 minutes, respectively. The accuracy of this method was 103%. A linear range was detected from 1.6 to 127.5µg/ml and CV < 5% calculated from intra and inter-essay precision results. LOD and LOQ were 1.6µg/mL and 2.4µg/mL, respectively. Cis-permethrin remained stable for 24 hours at room temperature; for 15 days at 4ºC and 30 days at -20ºC. The method was considered simple and suitable for determination of cis-permethrin in hair lotion.


Subject(s)
Humans , Permethrin/therapeutic use , Lice Infestations/prevention & control , Chromatography, Liquid , Production of Products , Epidemics/prevention & control , Hair Preparations/therapeutic use
9.
Neotrop. entomol ; 30(2): 321-325, June 2001. tab
Article in English | LILACS | ID: lil-514458

ABSTRACT

Objetivou-se verificar a existência de resistência cruzada em raças de Rhyzopertha dominica (F.) resistentes ao inseticida deltametrina. Os experimentos foram conduzidos testando outros três inseticidas, também usados para controlar pragas de grãos armazenados, como permetrina (piretróide), pirimifós-metil e clorpirifós-metil (organofosforados). Quatro raças da praga foram usadas: duas raças suscetíveis, BR4 e UK1, e duas raças resistentes, BR6 e BR7, todas mantidas em laboratório após a coleta nos armazéns. Inicialmente todas as raças foram avaliadas em sua susceptibilidade ao inseticida deltametrina. Posteriormente, cada raça foi submetida a pressão de seleção ao inseticida deltametrina por três gerações consecutivas e no final da terceira geração cada raça foi avaliada em sua suscetibilidade com todos os inseticidas para determinar a resistência cruzada. Os resultados mostraram a existência de resistência cruzada para o inseticida permetrina, nas raças BR6 e BR7 de R. dominica. Não houve resistência cruzada aos dois inseticidas organofosforados testados. Isso indica que a resistência cruzada ocorreu dentro do mesmo grupo químico de inseticidas e não entre diferentes grupos.


In order to verify if there was cross-resistance in deltamethrin resistance strains of Rhyzopertha dominica (F.), experiments were carried out with three insecticides used in stored grain to control pests: permethrin (pyrethroid), pirimiphos-methyl and chlorpyrifos-methyl (organophosphates). Three strains from Brazil (BR4, BR6 and BR7) and one from United Kingdom (UK1) were tested. The strains BR4 and UK1 were susceptible and BR6 and BR7 were resistant to deltamethrin. Initially all strains were assessed in their susceptibility to deltamethrin insecticide. Then, after they were submitted to deltamethrin selection pressure throughout three generations, each strain was assessed with all other insecticides to determine the cross-resistance spectrum. Results showed that cross-resistance to permethrin existed in the BR6 and BR7 strains of R. dominica. No cross-resistance to the organophosphates, pirimiphos-methyl and chlorpyrifos-methyl, was detected in deltamethrin-resistant strains.

10.
Acta amaz ; Acta amaz;24(3)1994.
Article in Portuguese | LILACS-Express | LILACS, VETINDEX | ID: biblio-1454552

ABSTRACT

The efficiency of deltamethrin and permethrin was evaluated against caterpillars and moths of the eucalyptus leaf caterpillars species Thyrinteina arnobia(Lepidoptera: Geometridae) and Nystalea nyseus (Lepidoptera: Notodontidae). Five sampling points were established in each experimental unit and the evaluations were performed after 24, 48 and 72 hours after insecticide aplication. A high dosage spraying was made after the last evaluation and the number of dead insects was counted in each sampling point and the efficiency (%) calculated in relation to the mortality in the control. It was observed a high and fast larvicidal effect of deltamethrin and permethrin against these defoliator species. These insecticides however, were not efficient against the adults of these species and showed low selectivity in relation to other insects, mainly parasitoid Hies.


Avaliou-se a eficiência dos piretróides deltametrina e permetrina em lagartas e mariposas de Thyrinteina arnobia (Stoll, 1782) (Lepidoptera: Geometridae) e Nystalea nyseus (Cramer, 1775) (Lepidoptera: Notodontidae). Cinco pontos de amostragem foram estabelecidos em cada parcela e as avaliações feitas 24, 48 e 72 horas após a aplicação dos inseticidas. Após a última avaliação foi feita uma pulverização a alta dosagem nos pontos de amostragem e contado o número total de insetos remanescentes nesses pontos para permitir o cálculo da porcentagem de eficiência em relação à mortalidade da testemunha. Evidenciou-se rápida ação larvicida da deltametrina e permetrina contra as duas espécies desfolhadoras. Esses inseticidas contudo, não foram eficientes contra os adultos dessas espécies e mostraram baixa seletividade cm favor de outros insetos, principalmente moscas parasitóides.

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