Due to liability reasons we are not able to comment on the work performed by pest control companies. We strongly urge you to contact the applicator and the local health department for more help. We have provided the product labels for both products below so you can see how they are supposed to be applied for bedbug treatments:
http://www.domyownpestcontrol.com/msds/Demand_CS_Label.pdf
http://www.domyownpestcontrol.com/msds/DeltaDust_label.pdf
Delta Dust is good to use as part of a scorpion control program and would be a great product to apply to the cracks and crevices in the attic. Delta dust can be applied using a hand duster directly behind baseboards, to window and door frames, corners, pipes, storage locations, attics, crawl spaces, and other areas which these pests may enter or crawl. We also recommend that you use a concentrated liquid insecticide such as Demon WP around the outside perimeter of your home to help create a barrier to keep these pests out. You should treat a band of soil 6 - 10 ft wide around and adjacent to the building. Also treat the building foundation to a height of 2 - 3 ft where pests are active and may find entrance. It is important that you do not rely on insecticides alone to control scorpions, you should also make some changes outdoors to make your property less favorable to this pest.
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.Delta dust is commonly applied in areas like electrical outlets, light switch plates and other areas where you do not want to apply a liquid insecticide. It will last if left undisturbed for 6-8 months. Bait gel (including Maxforce Roach Bait Gel) can be applied in that area (if there is not any dust present) but should be applied every two weeks to maintain a fresh food source for the roaches. It is only labeled for roaches. Delta dust can eradicate many other listed insects including roaches. If you are mainly treating roaches, we suggest applying a liquid insecticide mixed with an IGR (insect growth regulator) and water and treat on the exterior of the structure and the interior cracks and crevices. Apply the bait gel in areas (where you have not sprayed) like the cabinets, under the sink, behind the toilet, above the door frames, etc. Apply dust in the wall voids, outlets, light switch plates, etc. Bait is applied every two weeks, dust is applied every 6-8 months, liquid soultion is applied every 30 days outside and every 90 days inside. Please contact us if you have additional questions or concerns 866-581-7378 M-F 9-5PM EST.
We recommend dusting the entry points of the nest with Delta Dust if you know where the nest is located inside the structure. Yellow Jacket treatments should always be conducted at nighttime, when the Yellow Jackets are the least active and least likely to sting. Please also wear protective clothing or a bee suit. Please read the article below for additional information on treating yellow jackets.
We do not recommend treating inside the kitchen cabinets with Delta Dust or any insecticide dust as it could contiminate your utensils or food. When dealing with carpet beetles, it is very important to find and remove the source of the beetles to get rid of them for good. To learn more about carpet beetle elimination, please take a few minutes to read our article: Carpet Pest Beetle Control