Southern Ag Surflan A.S. Specialty Herbicide Pre-Emergent Herbicide with Oryzalin， 8oz<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Standard rate-Turf Grass - 1/2 oz. per gallon of water， 3 gallons per 1000 sq. feet.(See Label for complete instructions for other grasses). Apply now in early spring up to summer， prevents weeds from germinating. Tank can be mixed with Gly Star Pro， kills weeds on top of ground and prevents weeds from germinating. Please be careful with Gly Star Pro(same active percentage as Round Up) with anything green as the Gly Star Pro will kill it.</li><li>It will take 1.5 -2-quarts of Surflan-(Oryzalin 40.4 %) to treat an acre for turf grass(See label for complete instructions). Applications will vary based on the rate used during the treatment. For long growing warm regions， a stronger rate will provide a longer window of protection. At the low rate， you can expect 2-4 months of residual. Higher rates can yield 6-12 months of activity.</li><li>Do not reseed for 90 - 180 days following application as seed germination may be negatively affected.(Consult label before reseeding for proper seed germination)</li></ul></div><img src="http://ecx.images-amazon.com/images/I/413HCgHpHUL.jpg" noproxy>