Hi-Yield Super Marking Dye Blue, 16 Oz.

Easy to use, non-toxic marking dye. Highly visible, blue colorant that temporarily marks where you have sprayed, saving chemical, time, and money. reduces over-application. Ideal to use with insecticides, fungicides, herbicides, and fertilizers. Mix 1-ounce per gallon of mixed solution. More of less may be added depending on environmental conditions.