Behavior
"C. stigma" usually completes two lifecycles a year in Canada and the North United States but may complete several lifecycles a year further down South. They overwinter in ground litter during the colder months. "C. stigma" has been shown, like other ladybeetles, to be susceptible to the use of insecticides diminishing its population in the wild. In order to preserve the benefits of this insect, pesticide users are encouraged to use natural alternatives to pesticide in order to curb the decline of "C. stigma".
Habitat
"C. stigma" mainly lives within terrestrial/arboreal habitats, primarily feeding of aphids found in these habitats as well as scales and mealybugs. It is a beneficial insect, and is useful in both natural wood stands and commercial forests such as orchards and citrus groves. It is beneficial against non native species. An introduced Hemlock pest, the elongate hemlock scale, which has been doing considerable damage to Hemlock trees throughout North America, can be moderately controlled by the presence of "C. stigma". "C. stigma" is currently not a lady beetle that can be sold for commercial use in orchards or on farms.References:
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