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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.
Spreading stems and gently spreading leaves creates a goblet shaped clump. Plant height 5 m (16 ft). The foliage is green with pale inner edge and dark outer edge. Flowers are pendant shaped carmine-red to purple, 10–14 cm (4-5½ in) long, with a relatively long tubular part and 8 coloured lobes; petals not reflexed; staminodes 4.
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.
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. At times, if left unchecked, these sucking-insects may remain effectively concealed in these tight areas, only for older or ...
Canna 'Yellow King Humbert' Burbank is a medium sized Italian Group Canna cultivar; foliage green, but often variegated purple markings and occasionally whole leaves purple, oval shaped, spreading habit; oval stems, coloured green + purple; flower clusters are open, spotted, colours yellow with red spots, often large red markings and occasionally whole flowers red, staminodes are large; seed ...
It has variegated leaves of green with pale yellow variegation parallel to the veins. Nurserymen folk legend has it that in 1923, or thereabouts, a consignment of Canna 'Trinacria' rhizomes was despatched to Siam, now Thailand, from a nursery in California. When it arrived at its destination and was grown out it was found to have variegated ...
Make sure the leaves don’t come into contact with the water and use a rubber band to loosely secure the bag in place. Every couple of days, refresh the water and discard any wilted stems or leaves.
It forms branched rhizomes 60 centimetres (24 inches) long [10] that are divided into bulbous segments and covered in two lines by pale green or purple flaky leaves. The very large grains of starch stored there can supposedly be seen with the naked eye. The plants form an upright, unbranched stem or the overlapping leaf sheaths form a pseudo ...