Which application type is performed in a limited area where insects are present?

The correct answer is spot application. This method is specifically designed to treat localized areas where there is a known presence of insects. In pest control practices, spot application targets specific spots rather than treating an entire area, which allows for a more efficient and effective approach. It minimizes the use of pesticides, thereby reducing potential exposure to non-target organisms and the environment.

In contrast, a general application involves treating a broader area without focusing on specific locations, which is less efficient when dealing with localized infestations. Survey application typically refers to inspecting and assessing areas for pest activity rather than applying treatments, while direct application may also imply treating specific areas, but it does not always equate to the targeted approach of spot application.