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| Botelho,Deila Magna dos Santos; Resende,Mário Lucio Vilela de; Rezende,Juliana Costa de; Ribeiro Júnior,Pedro Martins; Andrade,Camila Cristina Lage de; Alves,Eduardo; Amaral,Douglas Carvalho. |
| Abstract: The objective of this work was to evaluate the difference between the isolates from two cercospora leaf spot symptoms (brown eye spot and black spot) in relation to conidial morphology, mycelial growth, cercosporin production, and reproduction of symptoms in coffee leaves collected in three municipalities in the state of Minas Gerais, Brazil. There was a difference between the isolates for the studied variables, but without any relation to the type of symptom. The differences found were not associated with the origin of the isolates. The symptoms characterized as black spot were associated with different host conditions during the infection process. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cercospora coffeicola; Coffea arabica; Cercosporin production; Conidial morphology; Mycelial growth; Reproduction of symptoms. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000102302 |
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| Araujo,Marla Alessandra; Pedroso,Alessandro Vitor; Amaral,Douglas Carvalho; Zinn,Yuri Lopes. |
| Estudos sistemáticos sobre os fatores de formação do solo são relativamente escassos no Brasil, em razão da dificuldade de amostrar vários níveis de um fator, mantendo os demais constantes. A região de Lavras, MG, possui grande diversidade geológica em uma área pequena, o que possibilita avaliar o controle exercido por diferentes litologias na mineralogia e nas demais características do solo. Foram selecionados oito solos embasados sobre quartzito, mica-xisto, gabro, itabirito, serpentinito, metacalcário, gnaisse e filito, em condições semelhantes de vegetação (floresta tropical semidecidual), relevo (terço médio de encosta) e clima. Após a descrição dos perfis, coletaram-se amostras dos horizontes e das rochas, e realizaram-se análises físicas e químicas... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Material de origem; Gênese do solo; Óxidos de Fe; Difração de raios-X; Suscetibilidade magnética. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000100002 |
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| Teixeira,Glauco Antonio; Alves,Eduardo; Amaral,Douglas Carvalho; Machado,José da Cruz; Perina,Fabiano José. |
| Stem and ear rot caused by Stenocarpella maydis are responsible for severe losses in maize production. Treatment of seeds with fungicides may induce environmental damage. Hence, this study aimed to evaluate the effects of essential oils extracted from Cymbopogon winterianus, Thymus vulgaris, Cymbopogon citratus, Corymbia citriodora, Cinnamomum zeylanicum, and Syzygium aromaticum on the development of in vitro S. maydis. In addition, maize seeds were treated with these essential oils to determine their possible mode of action and effects. The oils from S. aromaticum, C. zeylanicum, and T. vulgaris inhibited fungal development at concentrations higher than 0.025%. The oils from S. aromaticum and C. zeylanicum showed seed germination rates of 89.0% and 84.5%,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Stenocarpella maydis; Zea mays; Alternative control; Electron microscopy. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013001100004 |
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