Which statement is true regarding the application of ULV formulations?

The application of ULV (Ultra Low Volume) formulations requires careful calibration and application to ensure effectiveness and safety. ULV sprays deliver a very fine mist of pesticide, which means that the product can easily drift from the target area if not applied correctly. Proper calibration ensures that the correct amount of pesticide is used for the specific situation, maximizing efficacy while minimizing environmental impact and potential harm to non-target organisms.

In contrast, the other options present misunderstandings about ULV application. Safety precautions are essential, as applying these formulations without caution could lead to unintended consequences. Not all surfaces are safe for ULV applications, as certain materials may react negatively to pesticides, and porous surfaces do have some capacity to absorb chemicals, potentially reducing effectiveness. Therefore, careful calibration and application are paramount to achieving the desired results while safeguarding health and the environment.