Everything about Canna Rust totally explained
Canna rust is a
fungal disease of
canna caused by
Puccinia thaliae.
Symptoms include orange spots on the plant's leaves and stems. In advanced stages of infection, the upper leaf-surface spots coalesce, turn dark brown-to-black and finally the infected leaves become dry and fall.
Control
When Canna rust first appears, the affected foliage should be removed and discarded, otherwise the fungi will propagate and destroy the whole plant. The affected foliage shouldn't be
composted, as that will simply spread the fungus further.
Commercially, a liquid copper-based spray can be sprayed on the stems and both sides of the leaves to prevent fungal problems before they occur. Although used commercially,
copper isn't recommended for home use because of its
toxicity.
Further Information
Get more info on 'Canna Rust'.
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