What is recommended when using wettable powders?

When using wettable powders, it is highly recommended to use a respirator during mixing. Wettable powders are finely ground pesticide formulations that can easily become airborne when mixed with water. This airborne dust poses potential inhalation hazards to anyone breathing in the area. Wearing a respirator provides a crucial layer of protection, helping to prevent respiratory issues or other health concerns that might arise from inhaling pesticide particles.

Additionally, while some of the other options might seem relevant, they are not the recommended practices. For instance, mixing wettable powders with hot water is not generally necessary and could potentially lead to problems, such as uneven distribution or premature solubility. Storing chemicals in bright sunlight is typically discouraged, as UV exposure can degrade the efficacy of many pesticides. Lastly, mixing with oil might not be suitable for wettable powders, as these products are specifically designed to be mixed with water for effective application. Using water as a solvent is essential for activating the pesticide properties appropriately.