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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.
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 ...
Related: 7 Reasons Your Peace Lily Leaves Are Turning Yellow (and How to Fix the Problem) 1. Underwatering. Brown-tipped leaves on a peace lily can be a sign that your plant is not getting enough ...
This guide explains the most common reasons for peace lily leaves turning yellow and provides simple tips to help your plant recover. 1. Watering Stress. Overwatering and underwatering are, hands ...
The genus Canna is susceptible to certain plant viruses, which may result in spotted or streaked leaves, in a mild form, but can finally result in stunted growth and twisted and distorted blooms and foliage. Known species of virus are: Canna yellow mottle badnavirus (CYMV) infecting canna species.
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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.
Sometimes it helps to give the plant's pot a quarter-turn every week or so to straighten out its growth, but the better option is to increase light exposure. 5. Losing Variegation or Fenestration