In most cases spraying is the most economical form of applying pesticides, but consider the total cost when making decisions around the method of delivery of these chemistries.
Shipping costs of transporting water.

Labor cost and the ease and convenience of granules.

Golf course down-time after some liquid applications.

Risk adjusted cost of potential spills.

Equipment costs, including depreciation and maintenance of large spray rigs.

Costs associated with driving back and forth to refill liquid application equipment.

Costs of protective clothing for handling concentrated chemicals.

Clean-up costs of liquid spray equipment.

Sprayer calibration costs.

Ability to apply when the ground is soft, or in freezing temperatures.

Ability for easy spot treatments.