Bifen IT - Questions & Answers

There is not a time restriction on how soon you can reseed after applying Bifen IT. You may apply at same time or in separate applications.

Bifen IT is great product for perimeter control. The label recommends using it at a rate of 0.5 oz per gallon of water and it can be reapplied every 30 days. If you’ve been using it for a long time and no longer getting results, you can rotate to a different product, like Demand CS. If you are seeing activity indoors, you can spray on baseboards, cracks and crevices. You may also want to apply a dust into the wall voids like Delta Dust.  We would recommend reading over our Getting Rid of Earwigs article for further tips and information.

Depending on what you're treating for, we almost always recommend using an IGR such as NyGuard IGR with Bifen IT. If you are just doing prevention there is no need to use one or when treating for pests such as spiders or ants. However, other insects such as mosquitoes, fleas, etc do require one.

Bifen IT is not designed to be used along the perimeter of lakes since it is harmful to aquatic life so would not be used around docks. We recommend keeping Bifen IT treatments at least 25 feet from bodies of water to avoid runoff into the lake. You could use the all natural EcoVia instead which many folks use to treat their docks for mosquitoes spiders, and other insects that is safe around water.

Bifen IT can be sprayed onto and into the shakes to provide some relief from the silverfish. Be sure to use the highest usage rate of 1 oz of Bifen IT per gallon of water for the fastest knockdown and the longest lasting residual. You will need to reapply once a month to keep up the barrier.

People and pets should be kept out of the area until the application of Bifen IT (or any insecticide) has completely dried. This can usually take 1-2 hours. Once dry, it is safe to reenter the area. 

Bifen IT will not affect your trenching treatment done with Termidor SC.  Bifen I/T is considered a repellent.  When treating for ants, you can spray the lawn, trees and shrubs, along with 3 foot up the side of your home, 3 feet out into the soil all the way around the perimeter foundation of your home, around doors and windows and around the eaves and soffits of your home monthly.

You can use Bifen IT in all of the cracks and crevices along baseboards, door frames, window frames and places where cables pipes and wires enter through the walls and it will help control fleas in that area. Bifen IT cannot be used as a broadcast spray indoors over floors where fleas are known to develop and because of this is not usually chosen for flea control indoors. We recommend you use Ultracide for indoor flea control. It is our recommendation and industry standard that you vacuum immediately before the application of Ultracide and every day or every other day after the application for the next two weeks. Vacuums can physically remove a decent percentage of flea eggs that are in the carpet, along with much of the organic crud that the flea larvae feed on. A critical part of the diet of the larva is dried blood, present there as fecal material from the fleas that are on the pets. Wherever the pets spend time, they will shed the fecal matter and the eggs, so it is extremely important that you focus on these potential hot spots where the pets sleep. A vacuum also will remove a small percentage of larvae, but the larva is pretty tenacious, and will wrap around the carpet fibers down there at the base of the pile, and hold on for dear life as the vacuum passes by. The pupa is even tougher to physically remove, for it uses fibers as part of its "cocoon". The vacuum will stimulate the flea adults still in their pupa form to quickly emerge as the adult, and at this point perhaps be sucked up in the vacuum. Even if they are not removed by the vacuum, at least they now are exposed and susceptible to your treatment.   After two weeks most infestations require that you do a second application of the Ultracide and continue with the vacuuming.

Once Bifen IT dries, water will not reactivate the product. You just shouldn't walk on it while it is still wet from the application.

Bifen will not stain the logs as it is a waterbased insecticide. You should note that Bifen will not give your logs lasting protection against termites as it will not be able to penetrate in to the wood. At best a Bifen treatment will last for about 6 weeks. If you want lasting protection you need to use Bora-Care for your application. Bora-Care will penetrate several inches in to the wood and it will last for the life of the wood.