Abstract

O objetivo foi avaliar o efeito dos óleos essenciais de Mentha piperita, Cymbopogon nardus e Eucalyptus globulus, na qualidade sanitária e fisiológica de sementes e mudas de Schinus molle L. As sementes foram tratadas com os óleos essenciais nas concentrações de 10%, em 1 μL g-1 de sementes, 20% , em 2 μL g-1 de sementes, 30%, em 3 μL g-1 de sementes e o tratamento controle. Após os tratamentos, as sementes foram avaliadas pelo teste de sanidade, utilizando-se o método do papel de filtro (“blotter test”) e pelo teste de germinação, onde as sementes foram colocadas entre substrato vermiculita. Para as contagens, foram consideradas sementes germinadas e sementes mortas. Na avaliação da qualidade das mudas, mediu-se o comprimento da parte aérea, raízes, altura total e diâmetro do colo. A utilização dos óleos essenciais de citronela e menta reduziu a incidência dos diferentes patógenos presentes nas sementes de S. molle. O óleo essencial de menta a 20% e 30 % favoreceu a germinação das sementes. O óleo essencial de eucalipto, em qualquer concentração, aumentou o crescimento das mudas.Evaluation of essential oils in health and physiological quality of Schinus molle seeds and seedlingsThe objective was to evaluate the effect of Mentha piperita, Cymbopogon nardus and Eucalyptus globules essential oils, in sanitary and physiological quality of Schinus molle L. seeds and seedlings. The seeds were treated with essential oils at concentrations of 10%, on 1 μL g-1, 20%, on 2 μL g-1, 30% , on 3 μL g-1 and control. After treatments, seeds were evaluated by sanity test, using filter paper method (“blotter test”) and by germination test, where the seeds were placed between vermiculite substrate. For counts, sprouted and dead seeds were considered. Shoot length, root, total height and stem diameter were measured for seedlings evaluation. The use of citronella and mint essential oils reduced the incidence of different pathogens in S. molle seeds. Mint essential oil at 20% and 30% were effective to promote seeds germination. Eucalyptus essential oil in any concentration was efficient to increase seedlings growth.Index terms: Mentha piperita; Cymbopogon nardus; Eucalyptus globulus

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