Bifen IT is specifically labeled for a number of medically significant spiders including Black Widow, Brown Recluse and Hobo Spiders. It is important to remember that Bifen IT does not give an immediate knockdown but instead works over a period of several hours to kill spiders that have come into contact with the product. Bifen IT will also help to get rid of the insects that spiders feed on and that will help to stop new spiders from moving in. Indoors, spray around all baseboards, door frames, window frames, under appliances, in closets and storage rooms and in areas where utilities enter into the structure. Outdoors you should spray around the bottom of the foundation, on the ground adjacent to the foundation, door frames, window frames and places where the utilities enter into the structure. Brown recluse spiders are a bit trickier to eliminate because they often stay hidden in areas where people do not or cannot spray. We recommend that in addition to the Bifen IT, you also use glueboards in areas where spraying would not be appropriate and to help monitor the infestation (cabinets, closets, under furniture, storage areas)
Edible vegetation treated with Bifen IT should be discarded and not consumed. You should not consume anything in the area treated for one full growing season.
Yes, Bifen IT is labeled for roaches and will kill them. This product is not recommended if you have an active infestation of roaches. If you see an occasional roach, this can be used indoors and outdoors for control. The mixing ratio is 1 fl oz per gallon of water.
Also, please check out our Roach Guide for tips on how to treat and prevent roaches.