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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]
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.
Brown spot Calonectria colhounii Cylindrocladium colhounii [anamorph] Brown zonate leaf blight Ceuthospora lauri. Bud blight Phoma theicola. Charcoal stump rot Ustulina deusta [1] Ustulina zonata [1] [anamorph] Collar and branch canker Phomopsis theae. Collar rot Rhizoctonia solani Thanatephorus cucumeris [teleomorph] Copper blight Guignardia ...
Symptoms include needles developing yellow spots, horizontal brown bands around the needles, swelling of needles, and off-white fruiting bodies formed on infected needles. [ 2 ] [ 3 ] Because Cyclaneusma is an ascomycete it produces two spore types, an asexual ( conidiomata ) and sexual ( ascomycota ) spore.