O objetivo desta pesquisa foi realizar um diagnóstico das condições ambientais das Áreas de Preservação Permanente (APPs) localizadas na zona urbana de Uberlândia (MG) e avaliar a percepção da população que vive no entorno destas áreas. O enfoque metodológico utilizado foi quali - quantitativo. Foram realizadas visitas de campo, onde levantou-se dados sobre a paisagem local e com a aplicação de formulário estruturado junto a população que vive no entorno das APPs avaliou-se a percepção desses indivíduos, investigando suas opiniões, atitudes e valores em relação as áreas investigadas. Com os resultados obtidos concluiu-se que as nascentes e margens dos córregos de Uberlândia se encontram nas categorias de degradação média e alta, onde os principais problemas são o desmatamento, o uso e a ocupação desordenada do solo, a poluição do solo e da água. A população entrevistada demonstrou perceber os problemas nas APPs, reconhecendo sua importância estética e funcional, quanto ao fornecimento de água. Programas de recuperação das APPs devem ser acompanhados de projetos de Educação Ambiental, de forma a garantir o sucesso da regeneração e conservação destas áreas.

The evaluation of the direct effects of the relationship between plants and predators without considering the participation of herbivores can provide vital information for the study of ecological interactions and integrated pest management. In this context, the present work studied the behavioral responses of Chrysoperla externa (Neuroptera: Chrysopidae) larvae to the volatile organic compounds of young and mature, undamaged and damaged leaves of Eucalyptus urograndis (Myrtaceae), and investigate the chemical composition of leaf essential oils and their effects on the green lacewing. The responses of the C. externa larvae to the odors emitted by leaves were evaluated by an experimental behavior test using a Y-tube olfactometer. The essential oil was extracted by hydrodistillation of the young and mature leaves with and without damage. The larvae respond attractively to the volatiles emitted without the participation of herbivores, and it selected preferentially odors emitted by young leaves with simulated herbivory. The chemical composition was analyzed using gas chromatography coupled with mass spectrometry. This research identified 32 compounds; some of them had not been identified in other studies. Young leaves had a higher content of essential oil compared to mature leaves. Among the compounds identified, eucalyptol, α-Terpineol, Aromadendrene, and α-Terpinyl acetate are the major compounds. An inversion in the content of eucalyptol (which decreases) and α-terpinyl acetate (which increases) is observed when young and mature leaves are damage. Thus, this work contributed with basic data on the potential use of eucalyptus forests as maintainers of natural chrysopids populations.

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