ABSTRACT The objective of this study was to evaluate the in vitro properties of 41 Trichoderma native strains in egg hatching and mortality of the second stage (J2) of root knot nematode M. incognita. Trichoderma strains were grown on PDA at 30°C for eight days, and then 5 mm discs were placed in the liquid culture medium containing 200 g potato and 20 g dextrose L-1 distilled water. A series of filtrations were performed with sterile gauze, immediately centrifuged for 5 min at 3000 rpm, Whatman paper no. 1 and through a 0.45 μm milipore filter. The in vitro assay was conducted in two stages; the first was to add 1 ml of each fungal filtrate in siraccus with 50 eggs of the phytonematode and evaluated at 72. 96 and 120 h of exposure; the second consisted in adding these same filtrates with 25 second stage juvenils (J2) of M. incognita and its antagonistic effect was evaluated at 24 and 48 h, and the reversibility effect. The treatments consisted of 41 fungal filtrates and one control with sterile distilled water, four replicates distributed in a completely random design. The results indicated that the filtrates achieved up to 91.10 % inhibition of egg hatching of the phytonematode and up to 92.24 % mortality of J2 of M. incognita at different exposure times to the fungal filtrates.

RESUMEN El objetivo de este estudio fue evaluar in vitro la capacidad de 41 filtrados de aislados nativos de Trichoderma en la inhibición de la eclosión de huevos y la mortalidad de juveniles del segundo estadio (J2) del nematodo agallador Meloidogyne incognita (Kofoid & White) Chitwood. Los aislados fúngicos crecieron en PDA a 30°C durante ocho días; se colocaron discos de 5 mm en el medio de cultivo líquido, 200 g papa y 20 g dextrosa. L-1 de agua destilada. Se realizó una serie de filtrados con gasas estériles, inmediatamente se centrifugó el sobrenadante durante 5 min a 3000 rpm, papel Whatman número 1 y a través de un filtro miliporo de 0,45 µm. El ensayo in vitro se condujo en dos etapas, la primera fue adicionar 1 ml de cada filtrado fúngico en siracusas con 50 huevos del fitonematodo y se evaluó el efecto inhibitorio de la eclosión a las 72, 96 y 120 h de exposición; la segunda consistió en colocar en estos filtrados 25 juveniles de segundo estadio (J2) de M. incognita y se estimó su actividad contra movilidad, mortalidad y reversibilidad a las 24 y 48 h. Los tratamientos los conformaron los 41 filtrados fúngicos y un testigo con agua destilada estéril, con cuatro repeticiones, distribuidas en un diseño completamente al azar. Los filtrados lograron hasta 91,1 % de inhibición de la eclosión de huevos del fitonematodo y hasta 92,24 % de mortalidad en los J2 en los diferentes periodos de exposición a los filtrados fúngicos.

O artigo busca problematizar as transformações do trabalho na passagem da Modernidade para a Contemporaneidade, e alguns de seus efeitos nos domínios educacionais. Para tanto, mostramos o deslocamento de ênfase de um trabalho fabril para um trabalho que vem sendo chamado imaterial, que já não prioriza um sistema baseado na obediência a regulamentos e na vigilância do corpo. Sua organização lança mão de formas muito mais sutis de poder, apoiando-se em formas mais sofisticadas e complexas de atuar sobre os sujeitos. Esse quadro teórico serve de suporte para a análise de três programas trainees corporativos, que buscam capturar "grandes talentos" egressos de cursos superiores e torná-los fiéis colaboradores das organizações empresariais, fazendo com que desejem e passem a agir como autoem-presários prestadores de serviços.

The article attempts to discuss changes in work in the passage from Modernity to Contemporary and some of its effects in education. For this, we show the displacement in emphasis from a factory work, guided by a disciplinary organization, to a work that is being called immaterial. This is no longer a priority a system based on obedience to rules and surveillance of the body. Its organization makes use of more subtle forms of power, relying on more sophisticated and complex ways of acting on the subject. This theoretical framework supports the analysis of three trainees corporate programs, whose purpose is capturing "great talents" graduates from colleges and making them loyal employees of business organizations, making they wish and start to act as self-entrepreneurs service providers.