Agree with all the above. Some additional considerations - When Grazon P+D is needed, I recommend to not exceed the recommended rate for your particular weed problem. With 2,4-D, the "more is better" approach is more forgiving. With the P+D residual, effect on seed bank, no-tilling and reseeding later in the year is increased with higher application rates. The effect on reseeding may not be noticed, but will be there. The same issue applies to overlaps on application. Overlap strip has double the rate and increases the residual. I am just saying that the application of the P+D has more implications than the 2,4-D. Selection of herbicide is important, but decisions on application rates and methods are a part of it as well.
And always use a surfactant per the label recommendations.