*Nome comun da doença
Antracnose
*Agente causal
Colletotrichum gloeosporioides
*Importância da doença
Antracnose
*Agente causal
Colletotrichum gloeosporioides
*Importância da doença
Doença de distribuição mundial, possivelmente a doença de maior ocorrência em orquídeas cultivadas
*Sintomatologia
O fungo pode afetar qualquer parte da planta, mas sobre tudo folhas, principalmente quando injuriadas pela incidência de raios solares, frios ou ferimentos físicos. Os sintomas iniciais são constituídos por manchas arredondadas, grandes e de coloração castanha-marrom. Em seguida, as manchas tornam-se deprimidas e sobre elas surgem pequenos corpo de frutificação negros e elevados, responsáveis pela produção de massas de esporos fúngicos. Doença facilmente diagnosticada através da formação de círculos concêntricos sob as manchas.
*Práticas de manejo
Pode ser obtido com a retirada e destruição por fogo de folhas doentes; evitar molhamento do limbo foliar, uma vez que esporos podem ser disseminados por respingos e; aplicação de fungicida.
*Sintomatologia
O fungo pode afetar qualquer parte da planta, mas sobre tudo folhas, principalmente quando injuriadas pela incidência de raios solares, frios ou ferimentos físicos. Os sintomas iniciais são constituídos por manchas arredondadas, grandes e de coloração castanha-marrom. Em seguida, as manchas tornam-se deprimidas e sobre elas surgem pequenos corpo de frutificação negros e elevados, responsáveis pela produção de massas de esporos fúngicos. Doença facilmente diagnosticada através da formação de círculos concêntricos sob as manchas.
*Práticas de manejo
Pode ser obtido com a retirada e destruição por fogo de folhas doentes; evitar molhamento do limbo foliar, uma vez que esporos podem ser disseminados por respingos e; aplicação de fungicida.
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