Demon WP Insecticide - Questions & Answers

Demon WP is labeled for flea control in outdoor settings and will do a great job killing them when used as directed on the Demon WP product label.

Yes, Demon WP will kill houseflies that come in contact with the treated surfaces. Please review our treatment article on How to Get Rid of Flies for a more successful eradication program.

Demon Wp is not labeled to be applied in dishwasher and A/C ducts. It is very important that you read and follow the product label to avoid contaminating sensitive areas. You can use a high quality roach bait gel such as the Advion Roach Bait Gel to treat areas where spraying would not be appropriate (counter tops, cabinets, drawers, around dishwasher, a/c vent). The roaches will consume the bait and then go back to their nesting area and spread the bait which will help eliminate the roaches more quickly than spraying insecticides and IGRs alone. Getting rid of roaches is not a process that only takes only a few hours. Moderate roach infestations can take a few weeks to get rid of and severe infestations can take several months even when using all of the products needed (insecticide, IGR, roach bait) and sanitation is up to par.

Demon WP Insecticide can kill bees, including honey bees.  We do carry Mavrik Perimeter which is non- toxic to bees after it has dried. 

Demon WP Insecticide has a slight aromatic scent that will dissipate as the surfaces dry and the area is properly ventilated. Please be sure to mix 1-2 packs per gallon of water per 1,000 sq ft and apply quarterly to the interior crevices/monthly to listed exterior areas.

Yes, Demon WP can be used to control millipedes and dozens of other common crawling and flying pests. Be sure to check for ways to reduce moisture buildup in the environment to create an environment less favorable for these insects, such as pulling back groundcover and trimming plants near the foundation of structures.

When applying Demon WP Insecticide indoors, it is labeled for indoor cracks and crevices including the baseboards, behind the refrigerator, etc. We do NOT recommend applying this product to the countertops or food prep surface areas. If during treatment you feel this product may have gotten on the countertop, you can use soap and water to remove the product. 

Yes, Demon WP Insecticide can be applied to basebaords and cracks and crevices in bedrooms.  

Yes.  Demon WP is our best seller for scorpions.  Since it is a wettable powder it is easy for the scorpions to pick the product up on their bodies.  We also sell scorpion uv flashlights that can aid in detection when looking for scorpions. 

Demon WP is water soluble and is not a flammable product so there is not any issue with using the product around these areas.

Demon WP is not labeled for indoor flea control.  You would want to use a product such as Precor 2000 Plus Premise Spray. This product is easy to use and is safe to broadcast all over your floor surface. Precor 2000 Plus Premise Spray will kill adult fleas but also stop the reproductive cycle of those flease preventing them from laying more eggs. You would want to keep your baby and all children out of the treatment area until it dries completely. It normally takes a couple of hours to full dry. Once it has dried it is safe for you to bring your baby back into the treated area.

The Demon WP will leave behind a powdery residue on the surface that may need to be wiped off before staining. A better option would be Cyonara 9.7 which will dry clear on the surface and not need to be removed before staining. It will do just as good of a job at controlling bees as the Demon WP as well as other insects.

No, Demon WP is not safe to use around fruit trees. You can take a look at our Edible Garden Product page to find a product that is labeled to be used on fruit trees and also labeled for the insect that you are treating for. Please be sure to read the product label before use.

Demon WP does not have a strong lingering odor. You can safely spray Demon WP indoors for spiders and centipedes (be sure to read and follow the product label). You should remove all animals from the room during the application and they should not return until the product has had a chance to dry.  You should not spray areas that the tortoises have direct contact with, keep the application to cracks and crevices around the perimeter of the room. Some species of animals can be very sensitive to any kind of chemical and if your tortoises fall into this category we recommend you contact your veterinarian for further advice.

Typically you would want to apply 1 gallon per 1000 square feet of yard.  Each gallon would have one scoop of demon.  So, if your yard was 2000 square feet, you would place two scoops of Demon in the hose end sprayer, then fill the hose end sprayer to the 2 gallon mark with water.  This should apply one scoop per gallon of water over 1000 square feet. 

Demon WP is not a problem to use around pets as long as you apply it according to the label. Once Demon WP is mixed with water it is only strong enough to kill small insects. You would not want to leave the jar of Demon WP open where dogs could get into a large quantity of it. It is always a good idea to keep pets and children out of the area while you are treating. Once the product dries, usually after 30 minutes, it is perfectly fine to allow pets and children back in the area.

There is no difference between Demon WP and Cynoff WP other than they are made by different manufacturers.  They both have the same active ingredient, cypermethrin, and treat the same pests.  Just like there are different manufacturers of aspirin at the pharmacy, there are different manufacturers of pesticides that basically do the same thing as well.

Demon WP can be safely sprayed onto anything that water can be safely sprayed onto (we do not know how water safe insulation is). Insects that crawl over areas treated with Demon will be killed. You will need to reapply every 90 days to make sure the product is effective.

The best product we have for the larger cockroaches, or American cockroaches, is a product called Demon WP.  Demon WP is a wettable powder that you mix with water in a one gallon sprayer.  Wettable powders are easier for the roaches to pick up on their bodies, and they pack more of a punch which is what you need when treating for larger roaches.  Since the larger roaches come from the outside, you want to concentrate your spray on the outside of the house.  Spray 2 to 3 feet up onto the foundation and 2 to 3 feet out onto the ground.  You can also treat inside the rooms where you have issues.  Demon WP is not only labeled to treat roaches, but almost any other insects you may have a problem with including spiders, ants, silverfish, etc.  You should apply once a month for best results.