According to Quali-Pro Oryzalin 4 Pro's label, reseeding should be delayed for at least 90-120 days following application. When reseeding, it is essential that proper cultural practices such as soil cultivation and seedbed preparation, irrigation, and fertilization be followed. Also, using a weed and feed after that timeline is fine but make sure to read the label of the weed and feed you decide to use to make sure the herbicide in it doesn't stumt the growth of the new seeds.
Quali-Pro Oryzalin 4 Pro works best when irrigated with at least 1/2 inch of water after application. For the most accurate application, it is probably best not to apply during a rain.