What is the main purpose of disinfectants in pest control?

The primary purpose of disinfectants in pest control is to control microorganisms, which include bacteria, viruses, fungi, and other pathogens that can be detrimental to health and cause diseases in plants, animals, and humans. Disinfectants work by killing or inactivating these harmful agents, thus preventing their spread and minimizing the risk of infections or contamination.

While the other options pertain to different aspects of pest management, they do not relate to the function of disinfectants. Nematodes, slugs, and snails are specific types of pests that may be managed using different chemical or biological controls, but they are not targets for disinfectants, which are specifically designed to address microbial threats. Similarly, promoting plant growth is outside the scope of disinfectant action, as their primary role is to sanitize and disinfect surfaces rather than enhance growth.