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Puccinia thaliae is the causal agent of canna rust, a fungal disease of Canna. Symptoms include yellow to tan spots on the plant's leaves and stems. Initial disease symptoms will result in scattered sori (clustered sporangia), eventually covering the entirety of the leaf with coalescing postulates.
The International Canna Group, the premier Canna forum on the web. ICTVdB - Canna yellow mottle virus. ICTVdB - Bean yellow mosaic virus. ICTVdB - Tomato aspermy virus. New Disease Reports. ICTVdB - Cucumber Mosaic Virus; RHS article on Canna virus. MEDWORM search for "Canna" when you get there, as it is a report on many new discoveries.
However, they may fall victim to canna rust, a fungal disease resulting in orange spots on the plant's leaves, caused by over-moist soil. They are also susceptible to certain plant viruses , some of which are Canna -specific , which may result in spotted or streaked leaves, in a mild form, but can finally result in stunted growth and twisted ...
When your peace lily leaves are turning yellow, ... 7 Reasons Your Peace Lily Leaves Are Turning Yellow (and How to Fix the Problem) Lauren Landers. November 8, 2024 at 9:20 AM.
Leaf spots can vary in size, shape, and color depending on the age and type of the cause or pathogen. Plants, shrubs and trees are weakened by the spots on the leaves as they reduce available foliar space for photosynthesis. Other forms of leaf spot diseases include leaf rust, downy mildew and blights. [4]
Phoma leaf spot and root rot Phoma betae: Phymatotrichum root rot (cotton root rot) Phymatotrichopsis omnivora = Phymatotrichum omnivorum. Phytophthora wet rot Phytophthora drechsleri: Powdery mildew Erysiphe polygoni = Erysiphe betae. Pythium root rot Pythium aphanidermatum Pythium deliense. Ramularia leaf spot Ramularia beticola
The disease attacks during the summer months and causes yellow or orange spots to grow on the leaves of the cotton plant. These spots can cause defoliation, premature openings, broken stems, and reduced yield. [77] Crops with severe outbreaks have been known to incur losses of up to 50%. [76] This disease is controlled with applications of ...
Pyrenophora tritici-repentis and Drechslera tritici-repentis is a necrotrophic plant pathogen of fungal origin, phylum Ascomycota. [1] The pathogen causes a disease originally named yellow spot but now commonly called tan spot, yellow leaf spot, yellow leaf blotch or helminthosporiosis.