2,4 - D Amine Herbicide is not labeled to be used on a zoysia lawn.
Per the label, 2,4 - D Amine Herbicide is labeled to control clover.
2,4-D Amine has rates per area, such as 1-2 pints per acre, based on where you are using the product. Can you please tell us where you are applying the product so that we can better assist you? If you are treating in turfgrass, then you would need to select a different product that is labeled for that application. Please let us know if you need assistance. You can view the full product label here.
The rate of 2,4 - D Amine Herbicide will depend on the type(s) of weeds that you are treating. The product label states that it would be 2 pints per acre for annual weeds and 2-3.15 pints per acre for biennial and perennial weeds. This can be converted down and a use rate of 2 quarts per acre would be equal to 1.5 tbsp or 0.75 oz per 1000 sq ft.