Which aspect is crucial for effective pesticide application against cockroaches?

Effective pesticide application against cockroaches heavily relies on the placement of chemicals. Proper placement ensures that the pesticide reaches the intended target areas where cockroaches are active, such as cracks, crevices, and other harborage sites. By focusing on areas that are commonly traveled by cockroaches, the pesticide can achieve optimal contact with the insects, increasing the likelihood of elimination.

While other factors like the frequency of application, type of pesticide used, and timing of application can influence effectiveness, they are secondary to the importance of strategic placement. For example, even the most effective pesticide may fail to provide results if it is not applied in the right locations. Thus, accurate placement is essential to ensure that the treatment effectively disrupts the cockroach population in its preferred habitats.