Per the product label on Deadling Force II Slug & Snail Killer you need to be very careful after the application. You want to keep children and dosmetic animals out of the treated area until the product is no longer visible. So this product should eventually not be visible at all in the area that you are treating in.
The Deadline Force II Slug & Snail Killer should only be applied directly to the soil surface and between rows and not to the plant itself. While Rhubarb is not specifically on the label there are many other plants and edibles listed and the longest pre harvest interval is 21 days from time of application.
Deadline Force II Slug & Snail Killer was only available in the quart size.
Deadline Force II Slug & Snail Killer is a ready to use product not a concentrate that needs to be mixed. It must only be applied in drops directly to the soil around the plants.
One bottle of Deadline Force II Slug & Snail Killer will cover about 5 regular sized Hosta plants.
Deadline Force II Slug & Snail Killer is applied by raising the spout and squeezing drops of the product (or by applying a thin line) to the soil surface in infested areas. It should be applied around plants not for direct application to the plants. The lawn should be irrigated first if it is dry.