Which approach is least effective when dealing with small fly infestations?

The approach that is least effective when dealing with small fly infestations is using random insecticides without a plan. This method is inadequate because it lacks a targeted strategy, which is essential for effective pest control. Simply applying insecticides indiscriminately can lead to several issues, such as encouraging resistance in fly populations, potentially harming non-target organisms, and creating a false sense of security without addressing the underlying causes of the infestation.

On the other hand, regular cleaning and maintenance is a proactive measure that helps eliminate food sources and breeding grounds for flies. Constant observation allows for timely identification of problem areas, facilitating prompt action before an infestation escalates. Sealing possible entry points is crucial in preventing flies from entering and establishing themselves in an area. Together, these methods form a comprehensive strategy for managing infestations effectively, while using random insecticides undermines that strategy and can result in more persistent fly problems.