Close-up of underside of leaves of squaw-weed (Senecio ampullaceus) with sunflower white rust fungus Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis)(?) in Lick Creek ParkWeb page of Lick Creek Park by Dept. of Biology of TAMU. College Station, Texas

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College Station - Sam Houston Forest, Texas, March 19 - 22, 2023

Album 3368: College Station - Sam Houston Forest, Texas, March 19 - 22, 2023

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The image presents a close-up view of the underside of leaves from squaw-weed (Senecio ampullaceus) affected by sunflower white rust fungus, specifically Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis)(?).

The photograph is taken from directly above the plant, with the camera positioned to capture a detailed view of the underside of one leaf. The image reveals numerous small, cream-colored pustules scattered across the surface of the leaf. These pustules are circular and approximately 1-2 millimeters in diameter, featuring raised edges that give them a slightly crater-like appearance. They tend to cluster along veins on the underside of the leaves.

The surrounding leaf appears healthy, with no other visible signs of damage or disease. The green coloration is consistent throughout, indicating good health. However, some parts have a lighter hue due to the presence of pustules, which have absorbed some of the chlorophyll from their surroundings, resulting in an overall lighter appearance.

In summary, the image provides a detailed visual representation of sunflower white rust fungus affecting squaw-weed leaves, showcasing the characteristic cream-colored pustules that are indicative of this specific type of disease. – AI vision

🇪🇸 Descripción en español / Spanish Description

Primer plano de la cara inferior de hojas de malva (Senecio ampullaceus) con el hongo del moño blanco del girasol Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis)(?) en Lick Creek Park. College Station, Texas, 20 de marzo de 2023. La imagen presenta una vista detallada de la cara inferior de hojas de malva (Senecio ampullaceus) afectadas por el hongo del moño blanco del girasol, específicamente Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis)(?). La fotografía se toma directamente encima de la planta, con la cámara colocada para capturar una vista detallada de la cara inferior de una hoja. La imagen muestra numerosas pústulas pequeñas y de color crema dispersadas por toda la superficie de la hoja. Estas pústulas son circulares y tienen un diámetro aproximado de 1-2 milímetros, con bordes elevados que les dan una apariencia ligeramente cráterizada. Suelen agruparse a lo largo de las venas en la cara inferior de las hojas. La hoja circundante parece sana, sin otros signos visibles de daño o enfermedad. El color verde es consistente, indicando buena salud. Sin embargo, algunas partes tienen un matiz más claro debido a la presencia de pústulas, que han absorbido algo de la clorofila del entorno, dando como resultado un aspecto general más claro. En resumen, la imagen proporciona una representación visual detallada del hongo del moño blanco del girasol afectando las hojas de malva, mostrando las pústulas de color crema características que son indicativas de este tipo específico de enfermedad. – Spanish translation

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