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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.
It manifests itself in rust coloured streaks or mottled markings on the leaves and in colour breaks on the flowers. Sometimes leaves are slightly distorted and puckered. Like many plants under stress, affected cannas will flower very early in the season and before the plant is full height.
Cannas grow from swollen underground stems, correctly known as rhizomes, which store starch, and this is the main attraction of the plant to agriculture, having the largest starch grains of all plant life. [9] Canna is the only member of the Liliopsida class (monocot group) in which hibernation of seed is known to occur, due to its hard ...
When your peace lily leaves are turning yellow, ... and invest in a moisture meter if you tend to overwater your plants. Related: The 7 Best Plant Moisture Meters of 2024. 2. Lighting Issues
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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]
Plant: Hardy Hibiscus. ... Canna Lily. Canna lilies are striking plants that adore the heat! ... Its wispy leaves and profuse airy white flowers offer a delicate baby's breath-like effect to mixed ...
In addition, plant viruses occur: Hippeastrum mosaic virus, Tomato aspermy virus, Canna yellow mottle virus and Canna yellow streak virus which can cause mild or strong symptoms from streaked leaves, stunted growth to distorted blooms. Furthermore, there is Botrytis (fungus), a mold that affects the flowers. [20] Many different Canna varieties ...
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