Which of the following is a common application technique for indoor insect control?

Spot treatments are an effective application technique for indoor insect control because they target specific areas where pests are present, minimizing pesticide use and exposure. This method allows for precision in application, ensuring that the treatment is applied directly to the problem areas, which can lead to quicker and more effective results. Additionally, spot treatments can help reduce the risk of pesticide residue in non-target areas of the home, making it a safer choice for indoor environments.

Other options, while useful in specific contexts, may not be as effective for indoor insect management. Granular application is typically more suited for outdoor settings where soil or larger areas can be treated, and may not be advisable indoors due to potential dust and residue issues. Cultural practices, which focus on changing the environment to deter pests, require more time and effort and might not provide immediate relief for current infestations. Mechanical removal involves physically removing pests, which can be labor-intensive and may not eliminate the entire problem if the infestation is severe.