Spores (in Melzer) of sunflower white rust ... Spores (in Melzer) of sunflower white rust fungus Pustula tragopogonis (Pustula obtusata, Albugo tragopogonis ... on-the-Brazos a day before. Texas, March 7, 2023Spores and conidia of the sunflower white rust fungus Pustula tragopogonis, along with those of Alternaria leaf spot, were collected from a white powdery substance found on the underside of squaw-weed leaves in Washington-on-the-Brazos, Texas, on March 7, 2023. The collection was made the day before. – generated by AI The image displays a microscopic view of fungal spores and conidia on plant leaf tissue. The spores are elongated structures with rounded ends, exhibiting greenish-yellow coloration due to staining with Melzer's reagent. They measure approximately 10 micrometers in length. Several features are notable: * **Spore Coloration:** The spores appear yellow-green due to the influence of Melzer's reagent. **Conclusion:** The image depicts a microscopic view of fungal spores and conidia on plant leaf tissue, likely from the sunflower rust fungus (Pustula tragopogonis) and Alternaria leaf spot. The presence of these organisms can cause disease in plants, particularly those with white powdery spots or web-like structures on their leaves. **Final Answer:** The final answer is not applicable as this question requires a descriptive response rather than a numerical solution. – AI vision |
College Station, Texas, March 7, 2023 |
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