Lime-Sulfur dip for dogs

Considering that it is almost impossible to get lime-sulfur spray in affordable small quantities is there any reason that the lime sulfur pet dip cant be diluted and used as a fruit spray? I am looking at one that is 97.8% pure. What would the dilution rate be to use it as a dormant spray? I think a three percent solution is recommended for dormant spray? Seems that 1 gallon of water to 4 ounces would give a 3% solution? Can anyone affirm my math?