Underside of a leaf of squaw-weed (Senecio ampullaceus) with sunflower white rust fungus Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis) on a trailway near Birch Creek Unit of Somerville Lake State Park. Texas

🎞️ #3354-25

The image shows the underside of a leaf of squaw-weed (Senecio ampullaceus) with sunflower white rust fungus Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis)(?) on a trailway near Birch Creek Unit of Somerville Lake State Park. The image is taken from above and shows the underside of the leaf, which is light green in color. There are several small, yellowish-brown pustules scattered across the surface of the leaf, some of which appear to be clustered together in groups.

The pustules are irregularly shaped and have a rough, powdery texture. They range in size from about 1-5 mm in diameter. The background of the image is not visible as it appears that the photograph was taken close up.

Overall, the image suggests that the leaf has been infected by the sunflower white rust fungus, which is a common disease affecting plants in the Asteraceae family. – AI vision

🇪🇸 Descripción en español / Spanish Description

El lado inferior de una hoja de santo-malva (Senecio ampullaceus) con el hongo Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis)(?) del oidio blanco de girasol en un camino cercano a la Unidad Birch Creek de Somerville Lake State Park. Texas, 5 de marzo de 2023. La imagen muestra el lado inferior de una hoja de santo-malva (Senecio ampullaceus) con el hongo Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis)(?) del oidio blanco de girasol en un camino cercano a la Unidad Birch Creek de Somerville Lake State Park. La imagen se toma desde arriba y muestra el lado inferior de la hoja, que es de color verde claro. Hay varias pústulas amarillentas-marrón dispersadas por toda la superficie de la hoja, algunas de las cuales parecen agruparse en grupos. Las pústulas tienen forma irregular y tienen una textura rugosa y pulverulenta. Su tamaño varía desde alrededor de 1-5 mm de diámetro. El fondo de la imagen no es visible, ya que parece haberse tomado de cerca. En general, la imagen sugiere que la hoja ha sido infectada por el hongo del oidio blanco de girasol, una enfermedad común que afecta las plantas de la familia Asteraceae. – Spanish translation

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