ResumoA Educação a Distância é um importante movimento no contexto educacional que ganhou espaço recentemente devido ao impulso que recebeu com o desenvolvimento das ferramentas de informática e de comunicações. É nesse contexto que o presente trabalho se insere, abundância de recursos tecnológicos, rapidez nas comunicações, maior interatividade via internet e exigência de capacitação por parte do mercado de trabalho. O presente trabalho teve como objetivos: evidenciar a posição dos acadêmicos do ensino presencial sobre a metodologia de educação à distância; avaliar os pontos fortes e fracos da metodologia na opinião dos acadêmi-cos; avaliar a percepção dos acadêmicos, em relação às vantagens e desvantagens da metodologia, de educação a distância em relação ao ensino presencial. Foi realizada uma pesquisa com questionários semiestruturados com um grupo de 30 acadêmicos de uma Instituição de Ensino Superior. Com relação aos resultados obtidos, merece atenção a forma com que os acadêmicos receberam e se inseriram na dinâmica do ensino on line. A maioria dos alunos mostrou-se satisfeita com os resultados alcançados e com as possibilidades que a plataforma de ensino a distân-cia permite para a complementação do aprendizado.Verificou-se que os acadêmicos reconhecem a importância da Educação a Distância, mas preferem ainda o modelo tradicional do ensino presencial. Vale ressaltar que o trabalho trata de um estudo exploratório, onde foram levantadas questões sobre o assunto, as quais deverão ser mais bem exploradas e discutidas em outros

Nematodes stand out among the main soya bean yield limiting factors due to limitations in the main control methods, mainly when they are applied alone. Given the need of finding new control techniques, the aim of this study was to assess the efficiency of products based on biological control agents and on nutrients or products showing potential to induce resistance for Pratylenchus brachyurus and Meloidogyne javanica control in soya bean plants. The experiments were conducted in a greenhouse; nine treatments with six repetitions for each nematode were assessed in two distinct periods. Overall, all treatments have shown potential to control the nematodes in at least one experiment, mainly the ones containing biological control agents (Trichoderma and Bacillus). The vegetative development results were inconclusive; however, some products have shown potential to improve the growth of infected plants.

The use of antagonist plants is one of the most effective methods in the management of root–knot nematodes, and several plants recommended for this purpose are nitrogen‐fixing plants that act as green manure because of the amount of mass produced. The mode of action of some species has already been investigated, but this has yet to be elucidated for many plants researched as antagonists. Thus, this study aimed to assess the penetration and reproduction of Meloidogyne javanica on the root system of three species of crotalaria, as well as Mucuna deeringiana, Cajanus cajan, Canavalia ensiformis, Macrotyloma axillare and Stylosanthes capitata, with soya bean used as control treatment. Thus, plants inoculated with the nematode were assessed 5, 10, 15 and 20 days after inoculation (DAI), for nematode penetration and development. After 60 days of inoculation, the nematode reproduction factor (RF) was assessed. The plants did not prevent M. javanica penetration, which differed at varying degrees, according to the time of assessment and the plant species investigated. However, the nematode reproduction was impaired in all the leguminous crops assessed, with (RF)<1 in all the plants, while in soya bean the RF values were 2.85 and 2.56, in the respective experiments.

Trichoderma spp. is a fungus with nematode control potential; however, its potential to control the root lesion nematode Pratylenchus brachyurus remains poorly studied.Thus, the aim of this study was to select Trichoderma spp. isolates and assess their ability to control P. brachyurus in soybean crops. Different experiments were conducted aiming at selecting isolates, assessing whether they were able to reduce nematode penetration in plants or cause mortality in vitro, and whether they were able to induce resistance in soybean, as well as at studying the possibility of using the selected isolates associated with resistance inducers (acibenzolar-S-methyl, Ecolife™ and AgroMos™). The selection experiment found three isolates showing satisfactory results, namely GF422, GF425 and GF427; the GF362 isolate was assessed in the subsequent experiments. These four isolates reduced P. brachyurus penetration in soybean roots and promoted nematode mortality in vitro. Increased total protein and catalase activity were recorded, mainly in the 72-hr assessments. Overall, the protein production was different between isolates. The best results were found in the combination between the GF362 isolate and the three resistance inducers, between GF427 and Ecolife™, between GF427 and AgroMos™ and between GF422 and Ecolife™. K E Y W O R D Sbiological control, Glycine max, nematophagous fungi, resistance induction, root lesion nematode