Hi-Yield 2, 4D Selective Weed Killer is labeled for use on lawns, around ponds, drainage ditchbanks, pastures and rangelands. It should not be used on shrubs. It should not penetrate the ground and kill the shrubs. It should last for the entire season but if not, another application can be made after 30 days.
For a pre-emergence and post-emergent combination, we would recommend using Dimension 2EW. You will use .33 - .73 fl. oz. per 1,000 sq. ft. Please let us know if you have any additional questions.