What is the purpose of the pre-slurry step when preparing a tank mix?

• A. To pre-dilute all products in water
• B. To slurry dry products with a little water before adding to tank
• C. To mix incompatible products separately
• D. To heat the mixture

Answer: (B)

The main idea is to form a smooth slurry of dry pesticide products by mixing them with a small amount of water before adding to the full tank. This helps prevent lumps and dusty agglomerates from forming when the dry material hits a large volume of water, so the solid disperses evenly as you continue to fill and agitate the tank. By pre-slurrying, you get a more uniform final concentration and reduce the risk of clogged filters or uneven application.

This step is especially important for powders or dry flowables that don’t dissolve readily on contact with water. It’s not about pre-diluting every product in water, and it isn’t about heating the mix. It’s also not a substitute for addressing compatibility issues between different products, which may require separate steps.