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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.
The majority of insect pests on canna plants can be sprayed with a 70% isopropyl alcohol mist—diluted slightly—applied during non-sunny periods, as the alcohol may cause sunburn on the plant. Other effective options include insecticidal soap, neem and horticultural oils, and other commercially available spray treatments. Granulated systemic ...
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 ...
The plant has been grown as an aquatic ornamental because of the pretty violet flowers, and in cultivation has been proved hardy as far north as Philadelphia (Pennsylvania) and Vancouver (British Columbia). [6] [7] [8] Thalia dealbata grows to 6 ft (1.8 m), with small violet flowers on an 8 in (20 cm) panicle held above the foliage.
Canna indica, commonly known as Indian shot, [2] African arrowroot, edible canna, purple arrowroot, Sierra Leone arrowroot, [3] is a plant species in the family Cannaceae.It is native to much of South America, Central America, the West Indies, and Mexico.
A tall Foliage Group cultivar; green foliage, very large, broadly oblong shaped, maroon margin, spreading habit; oval stems, coloured green; spikes of flowers are open, red-orange with orange-red spots, staminodes are medium size, edges regular, labellum is gold flecked, stamen is gold with orange markings, style is orange, petals yellow, fully ...
Edema, (also spelled oedema, and named from the analogous disorder in humans and other animals), is a disorder in plants caused by the build-up of water in plant tissues faster than the leaves can transpire. [1] [2] The excess fluid bursts the cell membranes, which can appear as blistery growths, red spots, or small white 'crystals'. [3]
Canna Italian Group 'Roma' is a tall aquatic Italian Group cultivar, equally at home as a water marginal or in the border; large green foliage, oval shaped, white margin, upright habit; round stems, coloured green & purple; flowers are open, yellow with orange blotches, throat red-orange, staminodes are large, edges lightly frilled, stamen is orange-red, petals red, fully self-cleaning; seed ...
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