What type of pest control treatment applies small amounts of pesticide into cracks and crevices?

The correct answer is based on the specific application technique known as "crack and crevice treatment." This method is utilized to effectively target pests that inhabit hidden areas such as cracks, crevices, and other hard-to-reach spaces within structures. By applying small amounts of pesticide directly into these locations, technicians can more precisely control pest populations while minimizing the exposure of non-target organisms to the pesticide.

This treatment is particularly useful for controlling a variety of pests, including ants, cockroaches, and spiders, which often nest in these smaller, concealed areas, making them harder to reach with broader treatment methods. The precision of crack and crevice treatment allows for effective pest control with reduced risk of pesticide drift and environmental contamination.

In comparison, spot treatment refers to treating specific areas rather than targeting pests in hidden locations, while surface spray treatment involves applying pesticides to larger surface areas, such as floors or walls. Residual treatment focuses on creating a lasting barrier on surfaces to combat pests over time, which is different from the targeted approach of crack and crevice treatment. Each method has its purpose, but for the scenario described, crack and crevice treatment is the most appropriate choice.