What is a potential disadvantage of non-chemical pest control methods?

Non-chemical pest control methods can indeed have higher costs associated with their implementation compared to conventional pesticides in certain situations. This is often due to the need for more labor-intensive practices, specialized equipment, or longer timeframes to achieve effective pest control. For example, approaches such as biological control may involve introducing natural predators or parasites that require monitoring and maintenance, which can incur additional expenses.

The other options present challenges that are less aligned with the realities of pest management. While non-chemical methods can sometimes be easier to implement, this is not always the case; certain methods may be complex and require specific knowledge or technology. They do not guarantee sustainable pest management as there are risks associated with any method affecting ecosystems. Lastly, while some non-chemical methods might impact biodiversity negatively, many are designed to enhance or protect it, making it an inappropriate choice as a disadvantage.