What practice should be followed when using fogging equipment?

The correct answer emphasizes the importance of equipment calibration and favorable weather conditions for effective fogging operations. Ensuring that fogging equipment is properly calibrated is crucial because it directly influences the precision and efficacy of the pesticide application. Incorrect calibration can lead to under-application, which may not effectively control the mosquito population, or over-application, which can cause unnecessary environmental harm and exceed safety thresholds for both non-target organisms and human health.

Additionally, considering weather conditions is vital in fogging operations. Ideal conditions—such as low winds and minimal precipitation—facilitate adequate dispersal of the pesticide particles and enhance their effectiveness. If fogging occurs under unsuitable weather conditions, such as strong winds or rain, it can lead to ineffective control measures and unwanted drift, increasing the risk of pesticide exposure to non-target areas.

The other options lack the emphasis on these critical practices. Using fogging equipment regardless of weather conditions can lead to inefficient pest control and potential harm to the environment. Checking calibration only when a problem arises increases the risk of ongoing, undetected issues, which can compromise the entire operation. Performing repairs only when necessary could lead to prolonged use of faulty equipment, which can be detrimental to achieving successful mosquito management.