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Canna leaf roller refers to two different Lepidoptera species that are pests of cultivated cannas. Caterpillars of the Brazilian skipper butterfly ( Calpodes ethlius ), also known as the larger canna leaf roller, cut the leaves and roll them over to live inside while pupating and eating the leaf. [ 1 ]
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.
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. Over the years the canna will lose vigour and become increasingly unsightly. Some are spread by aphids and other sap sucking insects.
Calpodes ethlius, the Brazilian skipper, larger canna leafroller or canna skipper, is a butterfly of the family Hesperiidae. It is found in the United States from southern Florida and southern Texas , south through the West Indies , Mexico , and Central America to Argentina .
Melanospora cannabis (secondary on hemp canker) Rhizoctonia soreshin and root rot Rhizoctonia solani: Rust Aecidium cannabis Uredo kriegeriana Uromyces inconspicuus. Southern blight. Sclerotium root and stem rot Sclerotium rolfsii Athelia rolfsii [teleomorph] Stemphylium leaf and stem spot Stemphylium botryosum Pleospora tarda [teleomorph]
After the larval stage insects become pupae, this stage lasts for 6–10 days. [10] The pupae measure around 6.25 millimeters in length and 3.5 millimeters in width. They feature a pair of robust spines located at the end of their abdomen, along with smaller spines on the upper side of their other abdominal segments. [ 11 ]
Honeydew drops on leaves Bald-faced hornet sips honeydew from a Disholcaspis quercusmamma gall covered by sooty mold Magicicada cassini "cicada rain" slow motion. Honeydew is a sugar-rich sticky liquid, secreted by aphids, some scale insects, and many other true bugs and some other insects as they feed on plant sap.
Umbonia crassicornis, commonly known as the thorn bug, is a widespread member of the insect family Membracidae, and an occasional pest of ornamentals and fruit trees in southern Florida. The body length of the adult is approximately 10 millimetres (0.39 in).