Why is man an enemy of ladybugs?

Answer 1

By developing built environments that are unfriendly to beneficial insects and by making killing choiceshumans are enemies to ladybugs [Coccinellidae family]. The built environment is friendly to such beneficial insects as ladybugs when it includes native plants and respects nature. Specifically, respect to nature is shown when the different vegetation levels of ground level plants, understory shrubs and vines, and tree canopies are respected.

An example of a killing choice is the decision to control pests just by the most powerful chemical methods. Such chemicals may not be targeted towards a specific pest. They may affect every critter, be it beneficial or harmful or nondescript, in the area under pest control. Such chemicals may not be short lived in the environment. They may pack a powerful punch and hang around.