The image features a leaf infected with Ramularia rubella, also known as Ramularia leaf spot fungus, which is characterized by red spots on curly dock (Rumex crispus). The affected area was previously a pond located at Washington-on-the-Brazos State Historic Site in Texas. The photograph was taken on March 14, 2021.
The leaf exhibits numerous small, irregularly shaped, and discolored lesions. These lesions are red or reddish-brown and may be rounded or irregularly shaped. They are usually scattered across the surface of the leaf but can also appear in clusters. Most spots have a gray or pale brown center surrounded by red or dark brown margins.
The spots are caused by fungal spores that infect the plant through wounds or natural openings, such as stomata. The fungus then grows inside the plant and produces spores that are released into the air or water.
**Ramularia rubella**
* A common disease of curly dock (Rumex crispus) in Texas
* Caused by the fungus Ramularia rubella
* Characterized by red spots on the surface of the leaf
The image highlights the importance of monitoring for this disease and taking steps to prevent its spread. – AI vision
El hongo manchado de la hoja Ramularia (Ramularia rubella) en el arvejón rizado (Rumex crispus) en una zona anteriormente ocupada por un estanque en el Washington-on-the-Brazos State Historic Site. Washington, Texas, 14 de marzo de 2021. La imagen muestra una hoja infectada con Ramularia rubella, también conocido como hongo manchado de la hoja Ramularia, que se caracteriza por manchas rojas en el arvejón rizado (Rumex crispus). El área afectada fue previamente un estanque ubicado en el Washington-on-the-Brazos State Historic Site en Texas. La fotografía se tomó el 14 de marzo de 2021. La hoja exhibe numerosas lesiones pequeñas, irregularmente conformadas y descoloridas. Estas lesiones son rojas o marrones rojizas y pueden ser redondas o irregulares. Por lo general, están dispersas por toda la superficie de la hoja, pero también pueden aparecer en grupos. La mayoría de las manchas tienen un centro gris o pardo claro rodeado por márgenes rojos o marrones oscuros. Las manchas son causadas por esporas fúngicas que infectan la planta a través de heridas o aberturas naturales, como los estomas. El hongo luego crece dentro de la planta y produce esporas que se liberan al aire o al agua. **Ramularia rubella** *Una enfermedad común del arvejón rizado (Rumex crispus) en Texas* *Causada por el hongo Ramularia rubella* *Caracterizada por manchas rojas en la superficie de la hoja* La imagen resalta la importancia de monitorear esta enfermedad y tomar medidas para prevenir su propagación. – Spanish translation
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