What is a common method of pest control that does not involve chemicals?

A common method of pest control that does not involve chemicals is indeed a combination of biological control, mechanical traps, and thermal treatment. Each of these methods uses different approaches for managing pests without relying on chemical pesticides.

Biological control involves the use of natural predators, parasites, or pathogens to reduce pest populations. For example, releasing ladybugs in a garden can help control aphid populations, utilizing the natural food chain to maintain balance without chemicals.

Mechanical traps physically capture or kill pests and can include various devices such as snap traps, sticky boards, or electric traps. These traps are effective for monitoring and controlling pest populations by directly eliminating them without harmful chemicals.

Thermal treatment utilizes heat or cold to eliminate pests. For instance, heat treatment can be used to kill bed bugs by raising the temperature in an infested area to a level that is lethal to them, while cold treatment may involve freezing items to eliminate pests.

Since all these methods are effective in pest management without the use of chemical pesticides, it is accurate to say that all the options represent valid, non-chemical approaches to pest control.