When it comes to applications with a duster the rate that you put on it, it's generally not associated with ounces and ex number of square feet. Generally what you?re going to work out with the duster is getting a uniform application over the area. Which can best be described as getting down where you can see what's going on and shooting directly on the pest. Making sure that you get a good coverage by just eyeball because once you get a coverage of the dust, generally speaking it does the job well. You only want to put on enough to get the pest a dose of it to get that application and to get the coverage that looks like uniformly covered the problem. That usually makes for the minimal amount of product and that's best.