The proof is in the pudding, as they say. A pre-emergent's test is how completely it prevents target grassy weeds, and how long it lasts. It is much too early to judge it on either count.
I have used prodiamine for about 15 years in granular form. It works excellently, far exceeding dithiopyr (generic Dimension), or pendimethalin (generic Halts) in lasting qualities. I expect at least the same performance from a liquid app, and since I was able to apply at about 1 1/4 lbs per acre easily, on buffalograss, I should get about 7 months of good pre-emergent protection. It is FAR more economical to use than the granular versions of Prodiamine, which are very pricey. I like the way the product quickly disperses in water. I "cheated" by mixing it with warm water in a gallon jug and shaking it vigorously before adding it to my 60 gallon sprayer. It's bright yellow color makes it easy to check out the thoroughness of mixing in the tank. I combined it with a Trimec broadleaf herbicide for an easy broad spectrum treatment. I will edit my comment this fall for pre-emergent results.
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