Well, first off 1 gallon is equivalent to 128 fluid ounces. So that leaves us with seeing how many fluid ounces are needed in total. So, 64 x 8 = 512 fl. oz. In terms of gallons, that is equivalent to 4 gallons of pesticide needed to treat 64 acres.
It depends on what kind of pesticide is being used and how bad the crop is infected.
12.62 acre-inch contains 342,687.09 US gallons. (1 acre-inch is 27,154.3 gallons)
Corn takes between one to two gallons per plant on a weekly basis. An acre of corn take 350,000 gallons of water over the 100 day growing cycle.
Average is about 400 gallons per acre, up to a maximum of about 900 gallons per acre.
One acre-foot is 325,851.4 US gallons of water.
1,000 acre feet is 325,851,428.6 US gallons.
16,735,000 US gallons is about 51.36 acre-feet.
60,000,000 gallons equates to 184.1 acre-feet.
75,000 US gallons is 0.2301662 acre feet.
One acre-foot is about 325,851 US gallons.
1/16 acre-inch is about 1,697 US gallons.
Generally speaking about 300 gallons per acre.