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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.
The canna leaf roller butterfly (Calpodes ethlius) has been seen on Canna plants in the US. [22] It is a caterpillar known as the worst pest for this plant and primarily found in the Southern United States. This pest causes damages by laying its eggs in the bud of developing stalks.
"Eat your bugs - harvesting edible stink-bugs". Science in Africa. Archived from the original on 16 April 2011. Menzel, Peter; D'Aluisio, Faith (1998). Man Eating Bugs: The Art and Science of Eating Insects. Ten Speed Press. ISBN 978-1-58008-022-4. Nejame, Sam. "Man Bites Insect" New York Times Sunday Magazine. 10 February 2008.] Dicke, Marcel.
Trombidiidae, also known as red velvet mites, true velvet mites, [2] or rain bugs, are small arachnids (eight-legged arthropods) found in plant litter and are known for their bright red color. While adults are typically no more than 4 mm (0.16 in) in length, some species can grow larger and the largest, including the African Dinothrombium ...
Cockchafer feeds on deciduous plant and fruit tree leaves, including oaks, maple, sweet chestnut, beech, plum, and walnut trees. The feeding behaviour of larvae can cause severe damage to the plants. They feed on both the small roots of field plants such as grain, grass, tree, beet roots and the large part of crop rootlets.
Leafhoppers mainly are herbivores, but some are known to eat smaller insects, such as aphids, on occasion. A few species are known to be mud-puddling, but as it seems, females rarely engage in such behavior. Many species are also known to opportunistically pierce the human skin and draw blood but the function of such behaviour is unclear.
The adults and larvae of these insects eat scale insects, especially mealybugs. Females lay their eggs among the egg sac of mealybugs. Larvae feed on mealybug eggs, young crawlers and their honeydew. They become adults in 24 days, after four larval stages and a pupal stage. The life span is two months. [7] [8]