The license to spray for weed control is different than a landscaping license and business license. In our case it is in addition to those licenses. What is interesting is that each company has to have a license and so do the people who are doing the spraying.
A license is needed to advertise and spray for weed control which includes when it is included in a maintenance contract.
To check if someone / a company is properly licensed to advertise and spray for weed control ask them what their license number is and contract the Nevada Department of Agriculture.
The cost of spraying will take into account how long it will take to do the work, how much herbicide is used, what prep work needs to be done, and what type of herbicide is used. Sometimes more than one application is needed.