Cf from Cannon Ky 40923 writes
It is always a good practice to alternate products with different active ingredients. Resistance can take a few years to become an issue but you can switch between chemicals every 30 days, on a yearly or two-year basis. A great alternative to Demon WP would be something like Suspend SC. Suspend SC is a general insecticide that is labeled for various pests, including roaches, mosquitoes, ticks, fleas, etc. This can be used indoors and outdoors around the perimeter of your home. We would recommend 30 days between applications of different products.
Answer last updated on: 03/11/2019
