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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.
Most ugly leaves are caused by water issues, dry air, irregular temperature and too much fertilizer. Here’s how to spot the problem and how to fix it. Related: 7 Reasons Your Peace Lily Leaves ...
Red spider mites may also be a potential pest for cannas grown indoors, in dry areas, or that receive poor airflow. For canna grown outside (in California or Texas , for example), mealybugs and scale insects are most drawn to the dense folds and creases between the leaves and the stem/petiole, where the foliage attaches to the plant.
Rust fungi grow intracellularly, and make spore-producing fruiting bodies within or, more often, on the surfaces of affected plant parts. [3] Some rust species form perennial systemic infections that may cause plant deformities such as growth retardation, witch's broom, stem canker, galls, or hypertrophy of affected plant parts.
When your peace lily leaves are turning ... and only water your plants when the top of the soil starts to feel dry. While these plants grow best with evenly moist soil, too much water or poorly ...
Brown leaf edges are like a warning sign that your plant is experiencing stress. This could be due to underwatering, where the plant isn’t getting enough moisture to keep its leaves hydrated.
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]
Austropuccinia is a monotypic genus of rust (a type of plant pathogen) native to South America with the only species Austropuccinia psidii, commonly known as myrtle rust, guava rust, or ʻōhiʻa rust. It affects plants in the family Myrtaceae. It is a member of the fungal complex called the guava rust (Puccinia psidii) group. [3]