Demon WP Insecticide - Questions & Answers

Suspend can be used but it does not have a very quick knockdown which is what you need for large roaches entering from outside.  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.

You should spray Demon WP around your door frames, window frames, vents, eaves, around the bottom of your foundation, and any other crack or crevice where an insect could gain entry once a month August-November to stop lady bugs from entering your home.

Outdoor applications of Demon WP made once a month October - November can help you get control of the boxelder bugs, though you must understand that it will not drive them off of your property, it will only stop most of them from gaining entry into your home. You should also take the time to inspect the outside of your home and seal up any cracks, crevices or gaps you find so that you are limiting places where the insects can enter your home. Demon WP will also help eliminate roaches from your home but you will need to use it in conjunction with a high quality roach bait gel and an insect growth regulator as roaches like to hide and may not readily come into contact with treated surfaces. You can find both a roach bait gel and an IGR sold together in our Roach Control Kits. When the actual application of the Demon WP is being made all pets and children should be out of the house, and they can return as soon as the treated areas are dry. The roach bait gel should be placed directly into cracks and crevices around counters, sinks, drawers and cabinets. This will make the gel available to the roaches and inaccessible to your pets and children. The Gentrol Point Source do not actually contain any insecticides, just an insect juvenile growth hormone mimic. These discs can also be placed out of reach of children and animals and are readily used in sensitive locations such as hospitals and day cares everyday. Severe infestations may take several months to eliminate no matter what products you use. Sanitation will be a key factor in eliminating the roaches. Please take a few minutes to read the hints and tips in our German Cockroach article and our Boxelder Bug article to learn more about eliminating these pests.

You can spray all of your interior and exterior door frames, window frames and places where cables, pipes and wires enter through your walls with a good residual product such as Demon WP to help stop this pest from  entering your apartment. With apartment living you do have the issue of having pests from your neighbors apartment enter into your apartment through the walls. You can help reduce this risk by sealing up as many cracks and crevices as possible with caulk.

You cannot spray Demon WP or any other insecticide into your ducts. You can spray all around the exterior of your home and in your crawl space if you have one and around the vent covers. You should thoroughly check your duct work for holes and seal up any if found. In most cases insects are not actually in the ducts but instead they are crawling on exterior of them and then squeezing out beside the duct and coming out of the vent cover. You should remove the vent cover and caulk around the duct so that there are no opening allowing insects to pass beside the ducts and out of the vent covers.

Demon WP is not actually labeled for Japanese beetles though Japanese Beetles that land on treated surfaces will most likely be effected. We do recommend that you choose a product that is labeled for Japanese Beetles such as Talstar P for best results.

Demon Wp is one of the strongest products still left on the market.  That being said it will not kill immediately once dry after a spider walks over it.  Spiders are especially hard to kill because their main bodies are up off of the ground and they do not groom their legs like other insects.  There is no product that will kill very quickly, within minutes, after it is dry.  Only contact kill products, aerosols mainly that are sprayed directly on a spider, like Raid, will kill it that fast.  Demon is still considered the best residual product for spiders.

Each water soluble packet equals .33 oz of Demon which is the equivalent of 1 scoop of Demon from the 1 lb jar. If you use the 1 scoop per gallon usage rate you can make 48 gallons of solution.

You can use 1-2 scoops per gallon of water for ant control with Demon WP. Most folks use the higher usage rate for the initial treatment and the lower usage rate for maintenance treatments. You can see the full instructions by reading the product label which needs to be peeled off of the jar or by following this link: Demon WP Product Label

You should contact the manufacturer directly for this type of information. You can reach Syngenta 866-796-4368.

Demon Wp is safe to spray indoors. The label advises to remove all animals from the application area until the treated area has dried. We recommend contacting you extension office to see what products are safe to use in the pet shop.

You would not apply demon when food or food handling utensils are exposed. Make sure those areas are covered or put away, and then spray the cracks and crevices and listed areas for treatment on the label. Once the product has dried you can re-enter the area and bring out any food or instruments used for cooking.

That is a great question. We want to make sure you receive the best advise when dealing with your crop. To help trouble shoot with your specific question please contact the manufacturer of Demon Wp syngenta at 866-796-4368 to verify.

Demon Wp is not labeled to be used in edible Gardens.

Demon WP is not labeled to control grasshoppers, so although you could spray it in landscaping for general insect control, the label doesn't state that it would work on this pest. A better option would be something Talstar which contains Bifenthrin. You should start applications before the grasshoppers have a chance to hatch. You should thoroughly spray your lawn and water in the application with about a .25 in of water to help the bifenthrin get past the thatch layer and into the soil where grass hoppers actually develop. If you already have grasshoppers you can use Talstar P at the highest usage rate of 1 oz of product per 1 gallon of water for the quickest knockdown.

Dominion 2L is not labeled to treat Earwigs. By trenching and applying Dominion 2L, you will have treatment and prevention of Termites for up to 7 years. To treat Earwigs we recommend using a product like Demon WP, that can effectively be used indoors and out for treatment of Earwigs.

The vegetables are not safe to eat after it has come in contact with Demon WP. Please discard any edible vegetation that has been treated.

You can use the Demon WP indoors and outdoors but to protect the honey bees you should limit the outdoor applications to those places without flowering plants or other places where the bees are known to forage.

We can ship Demon WP to you, as long as the shipping address is not located in NY or CT.

Demon WP comes in water soluble packets. You will place one packet in a gallon of water, and it will dissolve in the water. Please let us know if you have any additional question.