What issue is associated with wettable powders?

Wettable powders are a type of pesticide formulation that consists of solid particles that need to be mixed with water to be applied. One of the main issues associated with wettable powders is the abrasion they can cause to pumps and nozzles during application. As these powders are pumped through the equipment, the solid particles can create friction and wear down components over time. This can lead to equipment malfunctions or decreased efficiency in spraying, thus necessitating more frequent maintenance or replacements.

In contrast, low effectiveness, high volatility in storage, and incompatibility with surfactants do not specifically relate to the inherent properties of wettable powders. They can remain effective when applied correctly, do not typically exhibit high volatility as they are solid particles, and can be compatible with surfactants when used appropriately. These considerations highlight why abrasion to pumps and nozzles stands out as a significant concern for those handling and applying wettable powders in pesticide management.