What does "WP" or "W" represent in pesticide labeling?

"Pesticide labeling often includes specific codes and abbreviations to convey important information about the formulation of the product. In this context, "WP" or "W" stands for "wettable powders." Wettable powders are a type of pesticide formulation that requires mixing with water before application. These powders are designed to disperse in water, allowing them to form a suspension and adhere effectively to target plants or pests during spraying.

This formulation is advantageous as it allows for a convenient method of application while also helping to improve the efficacy of the pesticide due to better coverage. Moreover, wettable powders typically have a long shelf life and can be cost-effective. Understanding this terminology is crucial for anyone involved in landscape horticulture, as it impacts the choice of pesticide and its suitable application methods in various environments.