The soybean cultivation (Glycine max (L.) Merrill) is responsible for the highest pesticides use in agriculture in Brazil. There is an environmental and social need to reduce the use of these substances in crops. The alternative products applied in agriculture such as plant extracts and essential oils, becomes necessary and indispensable, mainly in disease control. Among the plants studied, the Noni (Morinda citrifolia L.), has stood out in some studies, where relevant fungitoxic results have been demonstrated, however, there are still few works that prove its viability in the diseases management in field. Thus, this work aimed to evaluate the soybean diseases alternative control through the aqueous extracts and noni essential oil application, in plantings high and low disease pressure. Two field experiments were implemented, with soybean culture, evaluating leaf, fruit aqueous extract and noni essential oil as a fungicidal action. Foliar application of noni extracts and essential oil did not differ from fungicide in Asian Rust and Anthracnose control, in the 2016/17 crop, in both experiments. Soybean productivity was similar in treatments that received leaf extract (1748,8 Kg ha-1), essential oil (1762,5 Kg ha-1) and fungicides (2031,7 Kg ha-1). Where there was no large disease pressure all agronomic characteristics were equivalent, regardless of treatment.

A utilização de óleos essenciais tem sido usado como uma alternativa no controle de doenças e pragas pode ser uma alternativa viável. Na cultura da manga, a antracnose é considerada a principal doença por causar prejuízos na produtividade e qualidade dos frutos. O objetivo desse trabalho foi avaliar a utilização de óleo essencial de noni no controle preventivo e curativo da antracnose da mangueira. O fungo fitopatogênico foi obtido a partir do isolamento de lesões características de plantas de manga. O óleo essencial foi obtido a partir de frutos maduros de noni (Morinda citrifolia L.). Os bioensaios in vitro foram realizados testando-se diferentes concentrações do óleo essencial. Para o teste de fitotoxicidade foi utilizado cinco concentrações diferentes de óleo essencial de noni. O teste de controle preventivo foi instalado aplicando-se por meio de um borrifador manual. Também foi realizado o teste curativo. O óleo essencial de noni têm efeito inibitório no crescimento micelial da antracnose (C. gloeosporioides) in vitro em folhas de manga. Os sintomas de fitotoxicidade foram observados nas folhas de manga em doses de óleo de noni maior que 2,0%. A aplicação curativa do óleo de noni proporcionou controle parcial da doença. Na forma preventiva o uso de óleo de noni é mais eficiente que a curativa no controle da antracnose em plantas de manga. A aplicação do fungicida proporcionou eficiência de controle preventivo e curativo semelhante ao óleo de noni, demonstrando que o controle natural pode ser uma ótima opção de uso no manejo de doenças em plantas.

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Objectives Extracts of parts Musa spp. have been used for the treatment of various diseases in traditional medicine. Studies have shown that these extracts have hypoglycaemic properties. The aim of this work was to gather evidence on the antidiabetic effects of Musa spp. inflorescence. Methods A systematic review was conducted with searches in three electronic databases, along with manual searches. Studies evaluating the antidiabetic properties of extracts of flower or bract of the genus Musa (in vitro or in vivo) were included. Key findings Overall, 16 studies were found. The reported assays were of hypoglycaemic effects, oral glucose tolerance, inhibitory activities in carbohydrate metabolism and digestive enzymes, enhanced glucose uptake activity and popular use of the extract in patients with diabetes type 2. In vitro studies showed that use of the extract was associated with antidiabetic effects (e.g. increased glucose uptake and inhibition of carbohydrate digestion enzymes). In induced diabetic models, Musa spp. extracts showed dose‐dependent glycaemic level reductions compared with pharmacological drugs (P < 0.05). Summary In general, promising results regarding antidiabetic activity were found for inflorescence of Musa spp., suggesting that this plant could represent a natural alternative therapy for treating diabetes mellitus type 2.