Hello Gardeners, I’m Amanda McNulty with Clemson Extension and Making It Grow . In order to get a pesticide license to buy restricted use products, and to apply any pesticide commercially, farmers, growers, exterminator’s, and landscape professionals must pass exams. For a private applicator license, people take a day-long course at a local extension office. For a commercial license, you must study a core manual, pass that and then take special exams for such categories as landscape and turf or