The image shows an aerial view of a leaf with a yellowing spot that contains many small white pustules. The leaf is from a squaw-weed (Senecio ampullaceus) plant. A brownish-red spore mass is visible on the top surface of the yellowing area, indicating that it is infected with rust fungus.
The image was taken in Texas near Birch Creek Unit of Somerville Lake State Park on March 5th, 2023. The background of the image shows other leaves from the same plant and possibly other plants, but they are not as clearly visible as the leaf with the yellowing spot.
Overall, the image provides a clear view of an infected leaf and its symptoms, which can be used to identify the presence of rust fungus on squaw-weed plants. – AI vision
Hojas de consuelda (Senecio ampullaceus) con el hongo del mildiu blanco del girasol Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis)(?) en un camino cerca de la unidad Birch Creek del Somerville Lake State Park. Texas, 5 de marzo de 2023. La imagen muestra una vista aérea de una hoja con una mancha amarillenta que contiene muchas pústulas blancas pequeñas. La hoja es de una planta de consuelda (Senecio ampullaceus). Una masa de esporas marrón-rojiza es visible en la superficie superior del área amarillenta, lo que indica que está infectada con el hongo del mildiu. La imagen se tomó en Texas cerca de la unidad Birch Creek del Somerville Lake State Park el 5 de marzo de 2023. El fondo de la imagen muestra otras hojas de la misma planta y posiblemente otras plantas, pero no son tan visibles como la hoja con la mancha amarillenta. En general, la imagen proporciona una vista clara de una hoja infectada y sus síntomas, que pueden usarse para identificar la presencia del hongo del mildiu en plantas de consuelda. – Spanish translation
Similar(1): Underside of a leaf of squaw-weed (Senecio ampullaceus) with sunflower ... Somerville Lake State Park. Texas, March 5, 2023
Similar(2): Spores (in KOH) of white rust fungus Pustula tragopogonis (Pustula ... Somerville Lake State Park. Texas, March 5, 2023
Similar(3): Underside of a leaf of squaw-weed (Senecio ampullaceus) with sunflower ... Historic Site. Washington, Texas, March 6, 2023
Similar(4): Underside of leaves of squaw-weed (Senecio ampullaceus) with sunflower ... Creek Park. College Station, Texas, March 20, 2023
Similar(5): Close-up of underside of leaves of squaw-weed (Senecio ampullaceus ... Creek Park. College Station, Texas, March 20, 2023
Similar(6): Squaw-weed (Senecio ampullaceus) with sunflower white rust fungus ... Historic Site. Washington, Texas, March 6, 2023
Similar(7): Spores (in Melzer) of sunflower white rust fungus Pustula tragopogonis ... on-the-Brazos a day before. Texas, March 7, 2023
Similar(8): Tissues (in Melzer) of sunflower white rust fungus Pustula ... on-the-Brazos a day before. Texas, March 7, 2023