The present paper aimed to evaluate the landscape dynamics of the city of Cajuri, Minas Gerais, Brazil. For this, a digital image of the Sentinel-2A satellite, dated June 2020, was classified to map the current land use in the municipality and the areas of pasture, native forest, annual and perennial crops, coffee and urban extension were quantified. The data collected were compared with historical records made available by public sectors for the analysis of the dynamics of land use. Pastures (35.24%) and native forests (28.74%) occupy 63.98% of the territory of Cajuri. Part of the agricultural activities are in the environmental areas and require attention for the sustainability of the practices. Except for the urban area, all classes mapped have increased their occupation areas recently and in succession mainly to the citrus areas. The information presented can be used to assist in decision making, planning and strategic studies in the city.
O uso de inseticidas tem se mantido como base do manejo de insetos praga por mais de 70 anos, e é crescente a demanda por bioinseticidas na expectativa de que esses sejam uma alternativa sustentável eficiente no controle de herbívoros. Conhecer os efeitos de bioinseticidas sobre as espécies polinizadoras é fator essencial para que seja assegurado o serviço de polinização e principalmente a saúde das espécies. Este trabalho teve como objetivo avaliar o efeito dos bioinseticidas, extrato de Nim (Azadirachta indica) e DiPel (Bacillus thuringiensis) sobre as abelhas visitantes de flores de tomateiro. Realizou-se o plantio de mudas de tomateiro dos cultivares Pizzadoro e Santyno em três blocos. Cada bloco recebeu um tratamento: Nim, DiPel e testemunha. Foram coletados 111 indivíduos de abelhas, distribuídos entre sete espécies: Trigona spinipes, Apis mellifera, Exomalopsis sp., Bombus morio, Augochloropsis spp. Os resultados sugerem que os bioinseticidas não exercem efeito repelente ou letal sobre as abelhas e possivelmente o extrato de Nim funcione como atrativo para esses polinizadores.
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