This mixing rate of Basagran T/O depends on big of an area you are wanting to spot treat. Please refer to the Mixing Table on page 4 of the Basagran T/O label. The label also warns that applying this product as a spot treatment can result in excessive dosage and possible turf injury. Area to Be Sprayed / Amount of Basagran T/O / Amount of Water 200 sq ft / 1 teaspoon Basagran T/O / 0.2-0.4 gallons of water 400 sq ft / 2 teaspoons Basagran T/O / 0.4-0.6 gallons of water 1,000 sq ft / 5 teaspoons Basagran T/O / 1-2 gallons of water 1 acre / 2 pints of Basagran T/O / 40-80 gallons of water Sprayer Calibration Suggestions / Hand Sprayers: 1. Stake off a 400 square foot area of turf for practice. This is an area 20’ (7 steps) x 20’. 2. Add a measured quantity (1.5 gallons for example) of water to the sprayer and uniformly spray the 400 square foot area. Measure water remaining to determine the amount applied per 400 square  foot area. (Note: A minimum of 3 pints per 400 square feet is recommended). 3. Prepare the spray solution according to Table 1. Application Rates for Turf. Example:Assume that in Step 2 the 400 square foot area was uniformly covered with 0.5 gallon of water. Referring to the table, add 2 teaspoons of Basagran T/O per 0.5 gallon of water for each 400 square foot of turf to be sprayed. (Note: Using this mix to spot spray individual weeds may result in an excessive dosage and possible turf injury.)

When an herbicide calls for oil, it is referring to a surfactant.  Surfactant helps the herbicide stick to the waxy coating of the weeds and lawn you are applying it to.  It improves the effectiveness of herbicides greatly.