Yes, individuals who apply pesticides for hire (including 25(b) products) need to be licensed with the Nevada Department of Agriculture. Even though 25(b) products are considered minimum risk, they are still conducting pest control which includes soliciting and detecting.
Here are the specific statutes that state this rule.
NRS 555.280 License as applicator required for natural persons to engage in pest control. A natural person, including, without limitation, any consultant, demonstrator, researcher or specialist, shall not engage in pest control or serve as an agent, operator, pilot, primary principal, location principal or principal for that purpose within this State at any time without a license as an applicator issued by the Director.
NRS 555.2667 “Pest control” defined. “Pest control” means conducting as a function of the agency, in the case of a city, county, state or other governmental agency, or publicly holding oneself out as being in the business of detecting, preventing, controlling or exterminating pests or otherwise engaging in, advertising or soliciting for:
1. The use of pesticides or mechanical devices for the extermination, control or prevention of infestations of pests.
2. The inspection of households or other structures and the submission of reports of inspection, estimates or bids, written or oral, for the inspection, extermination, control or prevention of wood-destroying pests.