Most companies, municipalities that are treating public parks, etc use the cheapest (Bifenthrin) for large applications. Most lawn care companies use the same product when treating your turf. About a 3 week residual with Bifen. For more “green/organic” type treatment, use Essentria ICPro. Mixture of various oils. Works well, just doesn’t have as long of a residual in the sun/heat. Usually last about 10-12 days so more frequent applications needed.