Recommendations are based on what you are treating for. Demon WP is a very good general purpose insecticide for pests like spiders, roaches, etc. Keep in mind that it can leave a white residue behind on some surfaces.
Another good option for general pest control would be Cyzmic CS. This is a liquid concentrate that is mixed with water. It will go on clear and dry clear as well. The residual indoors is 90 days and 30 days outdoors.
1 envelope of Demon WP contains 4 packets. You will need to use 1-2 packets per gallon of water. The packets are water-soluble and will automatically dissolve when placed in water.
Demon WP should not damage limestone or any rock or other surface. Demon WP does leave a visible white residue on darker surfaces, but that should not leave any permanent stain. We recommend testing a small area first if you are concerned about this residue.
The current price for Demon WP Insecticide is $8.99 per envelope, or $94.80 for a box of 12 envelopes.
We do not recommend that your child eat the food that fell into the treated crevice that was recently treated with Demon WP Insecticide. Have the product container, label or Safety Data Sheet with you when calling Syngenta (800-888-8372), a poison contol center or doctor, or going for treatment if needed.
Depending on the size and health of the fly and the amount of Demon WP it contacts, it generally would take anywhere from a few minutes to several hours for an insect like a fly to die after contacting an area treated with Demon WP. For a very quick kill for flying insects, we recommend Maxforce Fly Spot Bait or Alpine Pressurized Fly Bait.
Demon WP is not labeled to control pantry pests, although it would likely kill any that contacted it. For the best control of a stored product pest such as the red flour beetle, it is really essential to keep looking for and to locate that initial source to get full control of the infestation. You can then vacuum and clean infested areas, treat cracks and crevices with a residual insecticide, and use traps for the adult insects. Gentrol Complete is a great spray to use since it includes both insecticide and Insect Growth Regulator (IGR) in one product. You can use GreenWay Pantry Patrol Traps for a pheromone trap.
Demon WP Insecticide cannot be used inside the home for fleas, only outdoors as directed on the prouct label. Fleas treatments with approved products are generally done every 2 weeks with lots of vacuuming in between.
We would recommend our Indoor Flea Kit. You can see the kit by clicking on the link here.
Here is a great video on how to use our Indoor Kit here.
Demon WP Insecticide could leave a white residue behind when mixed as directed that is noticeable on darker surfaces, how was the product mixed? At what rate please? Was the water clear before mixing?
Demon WP Insecticide can be used around your pregnant women. However, we recommend that you stay out of the treated area until it has completely dried. It is a crack and crevice or spot treatment for residual and contact pest control. It should not be sprayed in air ducts.
Demon WP Insecticide is a wettable powder that needs to be mixed with water. You would use 1-2 packets per gallon of water.
Demon WP must be mixed with water to apply. It is not labeled for bed bugs. Please take a look at our Bed Bug Guide for more information on appropriate products and how to treat and prevent this pest.
Demon WP does not provide an instant knockdown of insects even if the insects are sprayed directly. You will see results over the next couple of days as the roaches come into contact with the treated areas and receive a lethal dose of the insecticide and they then succumb to the effects of the product.
Demon WP cannot be used at all in an area where animals will graze. Non-grazing animals should be kept out of the area while the product is being applied, and can return once everything is dry.
Demon WP Insecticide needs to have about 1-2 hours drying time before allowing pets back out into the yard.
Demon WP Insecticide gives the following instructions on the product label: For mosquito control, apply as a general structural perimeter spray to landscape plantings, turf, and building foundations to control mosquitoes. Yards or other frequented areas enclosed by landscaping can benefit from the creation of a mosquito barrier to reduce invading mosquitoes by the treatment of perimeter vegetation. For best results, apply Demon WP in Water-Soluble Packets at recommended rates in 2–5 gallons of water per 1,000 sq ft. Higher volumes applied result in better coverage and, as a rule, will improve control. Application to vegetation away from structures may require additional applicator certification, e.g., in turf or ornamental categories.
Demon WP Insecticide will not be affected by the heat unless you are applying to plants. It can burn them if applied during very high temperatures. It would be best to apply in the morning or evening when temperatures are cooler.
Demon WP is only labeled to be used as a crack and crevice treatment along the baseboards.
The inert ingredients to Demon WP Insecticide and any product are privy to the manufacturer only.
