Este trabalho visou estudar a proteção de mudas de cafeeiro contra Cercospora coffeicola utilizando extratos vegetais, provenientes de matérias primas abundantes no estado de Minas Gerais, tais como cascas de frutos de café, folhas de eucalipto, folhas de café com ferrugem e ramos de lobeira (Solanum lycocarpum). Observou-se que extratos aquosos de folhas de café com ferrugem, de ramos de lobeira com vassoura de bruxa e de cascas de café proporcionaram os maiores níveis de proteção contra a cercosporiose do cafeeiro, quando comparados com acibenzolar S-methyl (ASM), um indutor de resistência padrão. Esses extratos proporcionaram diminuições na área abaixo da curva de progresso da doença (AACPD) de 37, 32 e 40% respectivamente, quando comparados com a testemunha inoculada. ASM proporcionou 41% de controle da doença.
This work was aimed at protecting coffee seedlings against Cercospora coffeicola using plant extracts, abundantly found in Minas Gerais State, such as those from husks of coffee berries, leaves of eucalyptus, coffee leaves with rust and branches of ‘lobeira’ (Solanum lycocarpum). It was observed that aqueous extracts from rusted coffee leaves, from witches’ broom diseased branches of ‘lobeira’ and from husks of coffee berries provided the highest protections of coffee plants, compared to acibenzolar S-methyl (ASM), a standard inducer of resistance. These extracts provided a decrease in the area under the disease progress curve (AUDPC) of 37, 32 and 40% respectively, when compared to the inoculated control. ASM provided 41% disease control.
