The Hi-Yield Crabgrass Weed Control is not labeled for use on any type of pasture or grazing land.
Hi-Yield Crabgrass Weed Control is labeled for pre-emergent control of poa annua as directed on the product label.
Per the product label for Hi-Yield Crabgrass Weed Control in southern warm season grasses, you would use 3 1/2 lbs per 1000 sqft for pre-emergent control of poa annua in the late summer to early fall 1-2 weeks prior to the onset of conditions favorable for the weed seed germination. You should contact your local cooperative extension office to enquire when the appropriate application time would be in your area.
Hi Yield Crabgrass Weed can be applied to seeded areas 2 weeks after germination. You can overseed 8 weeks after application of Hi Yield Crabgrass weed control.