Its hard to take the label rates for pounds per acre designed for farm use and convert it into something usable on small scale especially since most commercial growers rarely spray 400 gal/acre anymore.
Here is one example of how to do it: The max label rate for Kocide 3000 on dormant apples or peaches is 7 pounds per acre. I spray 100 gal/acre or 7#/ per 100Gal or .07 pounds per gal. Just a little more than 1 ounce per gallon.
I have no idea how many Tablespoons per gallon
Its a lot more accurate to measure chemicals by weight than volume especially since the density of each material is different. A tablespoon of copper will not weigh the same as a tablespoon of Imidan for example . A good digital scale now cost less than $20. It really helps reduce errors made when converting weight to volume
Thank you for the tablespoon to gallon conversion, but I believe I may have failed to communicate my point properly. I have no idea how many tablespoons of Kocide 3000 or any material to place in one gallon of water in order to comply with the label that specifies the rate in terms of pounds per acre. Although 256 tablespoons are in 1 gallon of water that knowledge really does not help determine how much Kocide 3000 to place in a gallon of water
Chemicals targeted to home owners are normally specified in tablespoons or fluid ounces per gallon so a tablespoon is the perfect measuring device.
Farm chemical labels are different. They are typically specified in terms of ounces or pounds per acre or sometimes just fluid ounces ounces per acre. The conversion to get the proper amount of material to place in one gallon of water is more difficult and requires an assumption on the amount of water required to cover the entire acre and a precise measurement of the materials required. When the label specifies pounds per acre its a lot safer to get the actual weight for the material to be applied rather than some estimate based on tablespoons. For farm chemicals where the rate is specified in fluid ounces per acre a tablespoon or even a teaspoon may be the perfect unit of measurement for a small sprayer
Kocide 3000 is one of those materials where the label specifies the rate in terms of pounds per acre.
University of KT was helpful enough to do the mesurements for us. While Kocide 3000 was not calucated Kocide 2000 was. If they have similar density then 1TBSP/gallon is 150% of 1.5lb/acre