Insecticidal activity of a protein extracted from bulbs of Phycella australis Ravenna against the aphids Acyrthosiphon pisum Harris and Myzus persicae Sulzer

Aphids cause significant losses in many agricultural crops and in many cases cause repeated insecticide sprays, which increase the risk of resistance. Therefore, other alternatives are needed to control them. The toxic, anti-reproductive, and feeding deterrent effects of a mannose-binding lectin isolated from bulbs of Phycella australis Ravenna (Amaryllidaceae), named Phycella australis-agglutinin (PAA) was assayed on nymphs of the aphids Acyrthosiphon pisum Harris and Myzus persicae Sulzer fed with an artificial diet. After 72 h of PAA exposure, lethal concentration (LC50) values were 109 and 313 mu g mL(-1) for A. pisum and M. persicae, respectively, while LC90 values were 248 and 634 mu g mL(-1). Sub-lethal concentrations of PAA significantly reduced the aphid fecundity at a concentration of 80 mu g mL(-1). Only a total of 5.7 descendants per female were recorded for A. pisum (32% control progeny) and 12.4 for M. persicae (39% control progeny). Acyrthosiphon pisum was strongly deterred by PAA under choice conditions, as after 72 h exposed to 80 mu g PAA mL(-1) of diet, the feeding deterrent index was 0.91 for A. pisum and only 0.38 for M. persicae. In conclusion, the mannosebinding lectin isolated from bulbs of P. australis showed acute and chronical insecticidal activity against the pea and green peach aphids

Respuesta de dos Aislamientos Chilenos de Metarhizium Anisopliae(Metschnikoff) Sorokin a la Adici\uf3n de un Protector Solar

Two Chilean isolates of Metarhizium anisopliae (Metschnikoff) Sorokin (QU-M363 and QU-M221b) were exposed to increasing doses of ultraviolet light (UV) under laboratory conditions. Conidia suspended in aqueous solution were spread on Petri dishes containing agar-agar and were placed under a UV lamp ( \u3bb = 254 nm). Without sunscreen, exposure of conidia to UV-C light reduced germination after 40 s from 80-95% to 5-2%, for QU-M221b and QU-M363, respectively. Using the solar screen Blankophor P167\uae \ue2 at 1% w/v, conidia germination decreased after 40 s from 68-82% to 50-33% for QU-M221b and QU-M363, respectively. Results indicate that the sunscreen Blankophor P167 is a potential adjuvant to be used in biopesticides based on M. anisopliae .Dos aislamientos chilenos de Metarhizium anisopliae (Metchsnikoff) Sorokin fueron expuestos a dosis crecientes de luz ultravioleta (UV), en condiciones de laboratorio. Conidias en suspensi\uf3n acuosa fueron esparcidas en placas Petri con agar y \ue9stas fueron puestas bajo una l\ue1mpara de luz UV-C ( \u3bb = 254 nm). Sin el protector solar, la exposici\uf3n de las conidias durante 40 s redujo su germinaci\uf3n de 80-95% a s\uf3lo 5-2%, para QU-M221b y QU-M363, respectivamente. Usando el protector solar Blankophor P167\uae \ue2 al 1% p/v, la germinaci\uf3n de las conidias, tras 40 s de exposici\uf3n, se redujo desde 68-82% a 50-33% para QU-M221b y QU-M363, respectivamente. Los resultados indican que este protector solar es un potencial adjuvante para ser usado en biopesticidas basados en M. anisopliae

NON-TARGET EFFECTS OF Dalaca pallens BLANCHARD CONTROL EXAMINED THROUGH PRINCIPAL RESPONSE CURVES: A GUILD APPROACH IN SOUTHERN CHILE

The non-target effects of biological control are a complex matter requiring a multi-approach analysis. A fungal biopesticide is under research to control the larval stages of the ghost moth Dalaca pallens Blanchard (Lepidoptera: Hepialidae) in southern Chile. A field experiment was conducted to compare the effects of the biological control agent Beauveria bassiana (Balsamo) Vuillemin (10 12 spores ha -1 ) and the insecticide lambdacyhalothrin (7.5 g active ingredient ha -1 ) on non-target invertebrate species belonging to different guilds. The soil invertebrates were collected by using pitfall trapping and soil coring before and after spraying the biocontrol agent or the insecticide. Caught individuals were assigned to predator, herbivore or decomposer guilds and then a relatively new multivariate technique called principal response curves (PRC) was adopted to track the potential treatment effects over time in the abundance or activity of the non-target guilds. The products targeting D. pallens caused different effects on guilds: lambda-cyhalothrin decreased the activity-density of the predator guild but not herbivore or decomposer guilds, while the biological control agent caused no reduction in the activity-density of the three examined guilds. The negative effects of the insecticide were present from 1 to 60 days after treatment

Influencia de los factores del Modelo TAM en la intención de uso del YAPE

El presente estudio tiene como objetivo identificar qué factor del Modelo TAM influye en la intención de uso del aplicativo móvil Yape. El Yape es un aplicativo móvil del BCP con el que se puede realizar transferencias utilizando el número de celular de los contactos telefónicos y el código QR. Este aplicativo además promueve la disminución de uso del efectivo y la bancarización en el Perú. El tipo de investigación es cuantitativo del subtipo transversal. El desarrollo de este va a permitir identificar la influencia que tienen los factores del modelo TAM en la intención de uso de los clientes del BCP que no utilizan el aplicativo Yape. El modelo TAM de Fred Davis se tomó como referencia para el marco teórico de la investigación debido a que se ha demostrado la influencia de sus factores en estudios anteriores. El instrumento de medición fue tomado de la investigación realizada por los investigadores Peter Yamakawa, Carlos Guerreo y Gareth Rees, quienes brindaron su autorización para el uso de su herramienta en la presente investigación. El tamaño de la muestra fue de 408 encuestados, los cuales fueron clientes del BCP que no utilizan el aplicativo Yape. Los resultados de la investigación concluyeron que el factor de Compatibilidad con el Estilo de Vida es el de mayor influencia en la intención de uso del aplicativo Yape.The following study aims to identify which factor of the TAM Model influences on the intention to use Yape mobile application. Yape is a BCP mobile application with which you can make transfers using the cell phone numbers on the contact list of the phone and the QR code. In addition, this application promotes the reduction of cash usage and bankarization in Peru. The type of research is quantitative from the Cross-sectional subtype. The development of this research will allow to identify the influence TAM model factors have on BCP clients who do not use Yape application intention to use it. The TAM model of Fred Davis was taken as a reference for the theoretical framework of the research since the influence of its factors has been demonstrated in previous studies. The data-collecting instrument was taken from the research carried out by researchers Peter Yamakawa, Carlos Guerreo and Gareth Rees, who gave their authorization for the use of their tool in this research. The sample was made of 408 respondents, who were BCP clients who do not use Yape application The results of the research concluded that the Lifestyle Compatibility factor is the one with the most influence on the intention to use Yape application.Tesi

Work Engagement and Job Crafting of Brazilian Professionals

The job demands-resources (JD-R) model explains the relationships between job demands and (job and personal) resources as well as the outcomes of these relationships in terms of well-being and job performance. We investigated the relationships between working conditions, job crafting and work engagement in two groups of professionals, those with and those without management responsibility. A total of 538 Brazilians professionals, 56.5% female, with a mean age of 43.44 years (SD = 12.54), participated in the study. The results of the network analysis demonstrated that the change and role clarity were direct predictors of work engagement and that personal and moral harassment negatively influenced work engagement. Working conditions did not predict job crafting. Job crafting predicted work engagement in both groups of professionals. Cognitive crafting was a strong predictor of work engagement. Evidence is added to determine the factors that impact work engagement in the JD-R model

Moving

El presente trabajo tiene como objetivo desarrollar una aplicación que logre generar un impacto en el mercado de servicios de mudanzas en el Perú. Es por ello que presentamos Moving, una aplicación con una propuesta disruptiva que ofrece seguridad total, servicio inmediato, seguimiento en vivo y más herramientas con la finalidad de brindar una experiencia única y personalizada nunca antes vista.  Según un estudio de IPSOS, alrededor de 200,000 personas se mudan al año en Lima. Todos con la necesidad de trasladar sus pertenencias de la manera más segura y económica. Hoy en día, la transformación digital ha cambiado el mercado y dicha aceleración en la transformación de la tecnología exige a las empresas contar con un sistema omnicanal e implementar la inmediatez en el caso de desarrollar una aplicación. Nuestro aplicativo pretende fusionar las necesidades del mercado de mudanzas con las exigencias actuales del mercado en cuanto a desarrollo digital y brindar una experiencia diferente. Moving pretende reunir la mayor cantidad de insights a partir de la metodología de investigación propuesta por el curso, así como también implementar de manera intuitiva las últimas tendencias. Todo ello con la finalidad de crear la mejor aplicación de mudanzas en el mercado.The objective of this project is to develop an application that manages to generate an impact on the moving services market in Peru. That is why we present Moving, an application with a disruptive proposal that offers total security, immediate service, live monitoring and more tools in order to provide a unique and personalized experience never seen before. According to an IPSOS study, around 200,000 people move to Lima each year. Everyone with the need to move their belongings in the safest and most economical way. Today, digital transformation has changed the market and this acceleration in the transformation of technology requires companies to have an omnichannel system and implement immediacy in the case of developing an application. Our application aims to merge the needs of the moving market with the current demands of the market in terms of digital development and provide a different experience. Moving aims to gather the greatest amount of insights from the research methodology proposed by the course as well as intuitively implement the latest trends. All this with the aim of creating the best moving application on the market.Trabajo de investigació

Os amparos médicos na jurisprudência uruguaia recente

To complete two previous investigations about the writ of mandamus or injunction - excluding those writs to deliver medication or special medical treatments -, the jurisprudence of the last two years was reviewed from both the First Instance Courts of Montevideo and the Appeal Courts. It broke off with clearly discouraging results because Uruguayan courts have very restrictive criteria regarding de admissibility of this constitutional and international guarantee and a surprising situation was reached: just as most petitions for protection are rejected by the courts, the opposite happens when a petition for protection is filed for medical reasons. An attempt was made to find some causes for this difference in criteria.A los efectos de completar dos investigaciones anteriores referidas a acciones de amparo, pero excluyendo en aquellas oportunidades a los que tenían por objeto la obtención de medicamentos o tratamientos especiales, se relevó la jurisprudencia de primera y segunda instancia de Montevideo de los comúnmente llamados “amparos médicos” en los últimos dos años. Se partió de resultados claramente desalentadores respecto al funcionamiento de esta garantía constitucional e internacional, y se llegó a una situación sorprendente: así como las acciones de amparo son mayoritariamente rechazadas por los tribunales, con los amparos médicos ocurre lo contrario. Se intentó encontrar algunas causas de estas diferencias de criterios.Com o objetivo de complementar duas pesquisas anteriores referentes a ações de amparo, mas que excluíam naquelas ocasiões as que tinham como objetivo a obtenção de medicamentos ou tratamentos especiais, foi analisada a jurisprudência de primeira e segunda instância de Montevidéu dos comumente chamados “amparos médicos” nos últimos dois anos. Partiu-se de resultados claramente desanimadores sobre o funcionamento desta garantia constitucional e internacional, chegando-se a uma situação surpreendente: enquanto as ações de amparo são em sua maioria rejeitadas pelos tribunais, o contrário acontece com os amparos médicos. Buscou-se identificar algumas causas dessas diferenças de critérios

Os amparos médicos na jurisprudência uruguaia recente

To complete two previous investigations about the writ of mandamus or injunction - excluding those writs to deliver medication or special medical treatments -, the jurisprudence of the last two years was reviewed from both the First Instance Courts of Montevideo and the Appeal Courts. It broke off with clearly discouraging results because Uruguayan courts have very restrictive criteria regarding de admissibility of this constitutional and international guarantee and a surprising situation was reached: just as most petitions for protection are rejected by the courts, the opposite happens when a petition for protection is filed for medical reasons. An attempt was made to find some causes for this difference in criteria.A los efectos de completar dos investigaciones anteriores referidas a acciones de amparo, pero excluyendo en aquellas oportunidades a los que tenían por objeto la obtención de medicamentos o tratamientos especiales, se relevó la jurisprudencia de primera y segunda instancia de Montevideo de los comúnmente llamados “amparos médicos” en los últimos dos años. Se partió de resultados claramente desalentadores respecto al funcionamiento de esta garantía constitucional e internacional, y se llegó a una situación sorprendente: así como las acciones de amparo son mayoritariamente rechazadas por los tribunales, con los amparos médicos ocurre lo contrario. Se intentó encontrar algunas causas de estas diferencias de criterios.Com o objetivo de complementar duas pesquisas anteriores referentes a ações de amparo, mas que excluíam naquelas ocasiões as que tinham como objetivo a obtenção de medicamentos ou tratamentos especiais, foi analisada a jurisprudência de primeira e segunda instância de Montevidéu dos comumente chamados “amparos médicos” nos últimos dois anos. Partiu-se de resultados claramente desanimadores sobre o funcionamento desta garantia constitucional e internacional, chegando-se a uma situação surpreendente: enquanto as ações de amparo são em sua maioria rejeitadas pelos tribunais, o contrário acontece com os amparos médicos. Buscou-se identificar algumas causas dessas diferenças de critérios