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Neste trabalho, objetivou-se avaliar o efeito de extratos e óleos essenciais de quatorze plantas medicinais e ou nativas, conhecidas popularmente no Norte de Minas Gerais, sobre a germinação de esporos e crescimento micelial do fungo Colletotrichum gloeosporioides. Foram utilizados no teste de inibição do crescimento micelial, os extratos aquosos de alecrim (Rosmarinus officinalis), erva baleeira (Cordia verbenacea), joá (Solanum sisymbriifolium), quebra-pedra (Phyllanthus corcovadensis), erva botão (Eclipta alba) e açafrão da índia (Curcuma longa) obtidos por meio do processo de infusão; óleo essencial de alecrim de vargem (Família Lamiaceae), alecrim pimenta (Lippia sidoides), alfavaca cravo (Ocimum gratissimum), lippia (Lippia citriodora), goiaba branca (Psidium guajava), capim santo (Cymbopogon citratus); óleo resina de copaíba (Copaifera langsdorffi); hidrolatos de alecrim de vargem, goiaba vermelha (Psidium guajava), lippia, capim santo, goiaba branca, alfavaca cravo; manipueira de (Manihot esculenta). Também foram testados esses mesmos hidrolatos e os óleos essenciais na germinação dos esporos do fungo. Todos os tratamentos foram realizados in vitro, cultivando-se o fungo em meio de cultura BDA acrescido de 100&#956;L dos compostos vegetais. No teste de inibição da germinação, todos os óleos essenciais impediram a germinação do fungo. No entanto, os hidrolatos não tiveram esse efeito. No teste de crescimento micelial, os óleos essenciais de todas as plantas inibiram completamente o crescimento do fungo, exceto o óleo da goiaba branca. Os extratos aquosos, a manipueira, o óleo resina e os hidrolatos, também não foram eficientes sobre o crescimento do patógeno. Esses resultados indicam o potencial antifúngico de alguns óleos essenciais de plantas medicinais.The objective of the work was to evaluate the effect of extracts and essential oils of fourteen medicinal and or native plants popularly known in the North of Minas Gerais, on the germination of spores and the mycelial growth of Colletotrichum gloeosporioides fungus. The following were used in the mycelial growth inhibition test: the watery extracts of rosemary (Rosmarinus officinalis), Cordia verbenacea, Solanum sisymbriifolium, Phyllanthus corcovadensis, Eclipta alba, and Curcuma longa obtained through the infusion process; essential oils of "alecrim de vargem" (Lamiaceae Family), Lippia sidoides, Ocimum gratissimum, Lippia citriodora, white guava (Psidium guajava), lemongrass (Cymbopogon citratus); copaíba oil resin (Copaifera langsdorffi) as well as hydrolates of "alecrim de vargem", red guava (Psidium guajava), Lippia citriodora, lemongrass, white guava, Ocimum gratissimum; and cassava manipueira (Manihot esculenta). The same hydrolates and essential oils were also tested on the germination of the fungus spores. All the treatments were carried out in vitro, cultivating the fungus in PDA supplemented with 100&#956;L of the vegetal compounds. In the germination inhibition test, all the essential oils prevented the germination of the fungus. However, the hydrolates did not have this effect. In the mycelial growth test, the essential oils of all of the plants completely inhibited the fungus growth, except the white guava oil. The watery extracts, the cassava manipueira, the oil resin and hydrolates were also not efficient in preventing the growth of the pathogen. These results indicate the fungitoxic potential of some essential oils of medicinal plants

Efeito in vitro de compostos de plantas sobre o fungo Colletotrichum gloeosporioides Penz: isolado do maracujazeiro