
O objetivo deste trabalho foi avaliar o efeito da aplicação de fungicida na morfologia e no teor da cera epicuticular, em duas cultivares de café, uma resistente à ferrugem (Obatã) e outra suscetível (Catuaí Vermelho). As plantas foram agrupadas por tratamento - com fungicida e sem fungicida -, coletando-se folhas do quinto e sexto nós, uma para estudo da morfologia e duas para avaliação do teor de cera. A aplicação do fungicida diminuiu o teor da cera e alterou sua morfologia, provocando rupturas e desaparecimento dos cristalóides, o que pode tornar a planta mais suscetível a doenças, pragas e estresse hídrico. As cultivares diferem quanto ao teor e morfologia da cera, o que pode estar relacionado com a resistência à ferrugem na cultivar Obatã.The objective of this work was to evaluate the effect of fungicide application on the content and morphology of the epicuticular wax of two Coffea arabica L. cultivars, one rust resistant (Obatã) and other susceptible (Catuaí Vermelho). Plants were grouped according to treatment (with and without fungicide application), sampling the leaves from 5th and 6th nodes, one for morphology study and two others for wax content. The fungicide application decreased wax content and modified its morphology, causing ruptures and missing crystalloids that can make the plant more susceptible to diseases, herbivory and desiccation. Cultivars differ in their content and morphology wax, which can be related to the rust resistance observed in the Obatã cultivar.
Agriculture (General), ferrugem, oxicloreto de cobre, Coffea arabica, rust, copper oxicloride, cera foliar, leaf wax, S1-972
Agriculture (General), ferrugem, oxicloreto de cobre, Coffea arabica, rust, copper oxicloride, cera foliar, leaf wax, S1-972
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