Demon WP Insecticide - Questions & Answers

Demon WP can be applied indoors in kitchens using a hand pump sprayer, but is not labeled to be used in cabinets at all. Apply directly into cracks and crevices around the door frames, window frames, places where utilities (cables, pipes and wires) enter into the structure and around the baseboards. In kitchens you can also apply behind the fridge, stove, and under the dishwasher.

Yes, Demon WP is one of the most effective insecticides on the market today and is labeled for almost all insects.  The "WP" part in Demon WP stands for wettable powder, and wettable powders are what you want to use with spiders.  Not only is this product very effective but it is still safe to use inside or outside and also safe if children or pets are present.  Place a good, wide, barrier around the perimiter of your home and you will see a huge difference in the number of all insects you see around the home.

For effective control you should reapply Demon WP every 4 weeks through the carpenter bee season. Usually carpenter bees come twice a year, once in the spring and then again in early fall.

Ideally, you should have at least 24 hours without rain both before and after your insecticide applications. Rain and other weathering will reduce the residual of your insecticides, so it is best to wait to apply if you are expecting heavy rainfall. You want to be sure that your application at least has time to dry before rain or other precipitation, usually about an hour.

Demon WP should be applied to cracks and crevices, underneath appliances, and in wall voids under sinks and behind toilets where pipes go into the walls.  Demon WP should be applied where bugs hide.  It really does not good to just apply all over baseboards or carpet.  It is better to apply the product around the outside perimeter of the house so bugs do not get inside in the first place, and then just treat the "hot spots" that we listed above inside.  It will not deteriorate wood finishes or any other surface, however it can leave a slight white residue on darker surfaces since it is a wettable powder.

Demon WP will kill just about any insect, including all types of ants.  However, Demon WP will only kill the ants that walk over where you treat around your home.  It will not take care of the queen and other ants back where the colony is.  The key to ant control is to use a product that will not kill the ants around your home on contact like Demon WP will, but a product that they will take back to the colony and kill the queen and other ants at the source.  Our most popular product for this is Termidor SC.  Or, you can use ant baits that the ants will eat and take back to the colony.  Otherwise, you will be battling the ant colony all summer long.

You can use 1-2 packets of Demon WP per gallon of water depending on what and where you are treating. Please take a few minutes to read through the Demon WP product label to see the recommended rate for your use.

No, Demon WP cannot be used on any edible vegetation. We do carry Acephate 75SP, Cyonara Lawn and Garden and Malathion 57%, each of which can be used on different fruits and vegetables. Malathion has the broadest label and is our most popular product for customers that need to treat fruit and vegetable plants. Always read the product label to be sure the plants you need to treat are listed. We also recommend contacting your local cooperative extension office to seek advice on the best products for plants and insects in your region.

We do not recommend spraying Demon Wp into your sink drain. It is very unlikely that the scorpions are actually coming up the drain. Most drains have a P trap at the bottom of the pipe that stays filled with water. This P trap stops bad odors from coming up the pipe and it also stops insects and other animals from coming up the pipe. Unless your pipes are damaged, the scorpions are most likely coming in from a nearby window fame or around cables, pipes or wires that enter through the structure and they are falling in to the sink. You should spray every crack and crevice around window frames, door frames and places where cables, pipes and wires enter into the structure. You should also spray outdoors around your foundation and around window frames, door frames and places where cables, pipes and wires enter into the structure.

Non-insecticide methods for scorpion control are:

Harborage Removal- Harborage removal is key to scorpion control and will greatly reduce the numbers of scorpions in the area surrounding the structure, making it far less likely that they will enter. Harborage removal includes eliminating piles of lumber, bricks, and other stacked items that create clusters of tight spaces, elimination of vegetation and other heavy ground coverings near homes and buildings, trimming back tree and shrub limbs from walls and roof, and keeping gutters clear of leaves and other debris.

Exclusion- Scorpions and other pests can be kept out of structures to a large degree by installing tight-fitting screens, weatherstripping around doors and windows, and caulking cracks and crevices.

Demon WP cannot be used on any type of edible plants. You can apply Demon WP to other plants as long as they will not be used for food.

Demon WP is labeled for mosquitoes. According to the Demon WP 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 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.

Demon WP is one of the strongest insecticides on the market and will work well for wasp control but it will leave a white powdery residue on the lawn and on other dark surfaces. If that is a problem you can use Demand CS which is strong like Demon WP but dries clear. You should note that neither of the products offers an instant knockdown so care should be used if spraying a live nest.

Demon WP should be used with 24 hours after it has been diluted with water. There are a couple of reasons for this 1.insecticides will start to degrade if they are left standing in water 2. Demon WP never truly dissolves in water and it will separate and clog your sprayer. You should also note that leaving liquids standing in your sprayer will void the warranty of most sprayers as most chemicals and even water will corrode the tank, seals and other sprayer parts when sprayer is not properly rinsed between uses.

Demon WP is labeled to spray on plants and lawns and should not cause any damage to them. That being said we still recommend that you test a one plant or a small area before broadcasting the spray as some plants can be sensitive.

The REL Date on Demon WP Insecticide is the date the product was manufactured.  If you store the product at room temperature and out of direct sunlight, the shelf will run between 3 and 5 years.

Demon WP Insecticide is pet safe as long as you follow the manufactuers labeled instrunctions.  Remove any animals from the areas being treated and keep them out of those areas until the product has had ample time to dry.  We suggest a minimum of a couple hours.  If your pet came in contact with the insecticide before it was dry and they are having a reaction we suggest you immediately contact your vetanarian and have your pet checked out.

 Demon WP Insecticide cannot be used on furniture, only cracks and crevices. Please let us know what you are treating for and we will make a better recommendation..

Demon WP is a great choice for spider control. Demon WP is a wettable powder that is diluted in water, and then sprayed around door frames, window frames, in areas where utilities (cables, pipes, wires) enter into a structure, around the bottom of the foundation and other area where insects are known to harbor. Demon WP will also eliminate the other insects in the area which in turn will help discourage other spiders from moving in since they will not have a food source to rely on.  Demon WP can leave a white powdery residue on dark surfaces. If the powdery residue is a concern you can choose a micro-encapsulated product such as Onslaught.

Demon WP does a fantastic job killing just about any spider that comes into contact with treated surfaces. Demon WP will also kill most other insects which will eliminate the spiders food source and make your home and property a less favorable hunting ground. Demon WP does not offer an instant knockdown and it can take several hours to a day for spiders to die after they come into contact with the dry residual. Please take a few minutes to read our article Brown Recluse Spider Control to learn how to make your home less favorable to this pest.

Demon WP will kill roaches but it will not kill roach eggs. Insecticides will only kill insects after they have hatched from the eggs. Insecticides cannot penetrate the egg shells. We would recommend using an Insect Growth Regulator such as Gentrol IGR along with the Demon WP as it can make some of the eggs non-viable and it will halt the reproduction of the juvenile roaches.