[8] C. undecimpunctata feeds on aphids associated with grasses - in fields, in ruderal biotopes, on steppe (including Pannonian steppe), stone quarries, wastelands, dry forest edges in meadows and coastal meadow, in open habitats with grasses, and near rivers.

[9] It is salt resistant and can feed on aphids inhabiting Atriplex tatarica and other grasses associated with saline areas.

Biological forms of pest control are used because they are less harmful than insecticides, which can have negative or even dangerous effects on the plant, beneficial insects, and even humans.

[13] C. undecimpunctata has been proven to be an excellent measure of pest control for cotton mealybugs (Phenacoccus solenopsis), though females tend to eat more over their lifespan than males did.

[15] Other insecticides like pirimicarb and pymetrozine are recommended as they do not have significant impact on C. undecimpunctata, where buprofezin, when sprayed on larvae, decreased survival rate to adulthood by 33%.