Which nozzle material is the best choice when applying mostly WP, DF, or WDG formulations?

When applying wettable powder (WP), dry flowable (DF), or water-dispersible granular (WDG) formulations, stainless steel nozzles are the best choice due to their resistance to corrosion and chemical degradation. These formulations can be abrasive and may contain harsh chemicals that could wear down or corrode other materials over time.

Stainless steel is durable and can withstand the rigors of using these types of pesticides, making it less likely to degrade while maintaining consistent performance. This durability is vital, as it ensures an even spray pattern, reduces the likelihood of nozzle clogging, and facilitates easier cleaning after application.

Other materials, such as brass, plastic, and copper, may not hold up as well under the same conditions. Brass can corrode when exposed to certain chemicals found in WP or WDG formulations, while standard plastic can become damaged or degraded over time. Copper can also corrode when in contact with certain pesticide formulations, leading to potential contamination of the spray mix. Thus, stainless steel emerges as the most effective and reliable choice for these applications.