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Pest Control Products
Bio Sanitation



Choosing the Appropriate Dust for Your Application

A number of dusts are available for PMPs’ use and dusts are a valuable and preferred tool for many applications. For best results, it is important to choose the right dust for the right application.
For this article, we’ll divide dusts into three categories:

An example of a repellent dust is EcoVia Wettable Dust. Other examples would be dusts containing pyrethroids or pyrethrin. The botanical actives in EcoVia provide true repellency, meaning that unlike pyrethroids (classified as “excito-repellents”), they don’t have to be touched by insects to repel them. EcoVia WD is a botanical dust with the unique feature that it can also be used as a wettable powder, i.e. it can be mixed with water to form a slurry for application purposes. Once the water evaporates, a thin film of the dust remains on the surface. This provides extended residual activity for the botanical oils. Repellent dusts tend to also be fast-acting, so they are the preferred choice for treating stinging insect nests. The botanical oils in EcoVia WD are faster-acting than pyrethroid dusts and provide quick knock-down of stinging insects. EcoVia WD will also have a fumigation effect when applied in smaller void areas. Other applications for repellent dusts would be for crack and crevice use on the outside of structures, to prevent overwintering pests and other pests from entering. EcoVia WD applied as a wettable powder is perfect for overwintering insect treatment and prevention, and also for spraying eaves and other areas prone to spider webbing. Unlike pyrethroids, this treatment can be used on boat docks and other areas near water.

  • Stinging insect nest treatment
  • Exterior crack and crevice treatment to stop invaders
  • Overwintering pest treatments
  • Eaves, boat docks and other areas for spider control, as a wettable powder
  • Other larger, hard-bodied, or difficult to control pests, such scorpions, ticks, pill bugs and beetles

The premier performing non-repellent dust on the market is CimeXa Insecticide Dust. For indoor pest treatments such as bed bugs, brown recluse or other indoor dwelling spiders, fleas, German cockroaches, silverfish and stored product pests, repellency is counter-productive. The objective with indoor pest control is to kill the pest, and that will happen most effectively when the pest walks through the dust. CimeXa and other desiccant-based dusts are best suited for relatively dry areas. They would not be the best choice for chronically wet or damp areas such as commercial kitchens. Non-repellent dusts are generally slower-acting. CimeXa typically kills within 12 to 24 hours of exposure. The active ingredient doesn’t breakdown, so CimeXa is active until it is removed, as long as it is in a dry area. Accumulation of a lot of household dust on CimeXa can reduce effectiveness, however.

  • Bed bugs, including mattress treatment
  • German roaches and ants in residences, and other areas without standing water
  • Indoor spider (including brown recluse), flea, tick and mite control
  • Stored product pests, and carpet beetles and clothes moths
  • Silverfish
  • Attic dusting for long-lasting protection, including drywood termite prevention and treatment

The leading borate dust on the market is BorActin Insecticide Powder. Borates are also non-repellent, however they need to be ingested to kill. Self-grooming insects like cockroaches pick up the dust when walking through it, and ingest it when grooming. Predator pests such as spiders might also ingest the boric acid indirectly through eating a poisoned insect. The finer-milled the powder, the more effectively it fills voids and sticks to insects. Boric acid dusts like BorActin are superior to powders made of borate salts, as salts are crystalline by nature and don’t stick to the insect as well. Borates are water-soluble and can also be sprayed or foamed, however, their effectiveness is greatest in dust form. The ideal application for boric acid dust is use in damp areas with organic build-up such as commercial kitchens for German cockroaches and small fly control.

Applying the dust to areas with organic build-up effectively turns the scum into toxic “bait”. Roaches and flies feed on the organic build-up and ingest the boric acid. Small flies also lay their eggs in this scum and the larvae live in it and feed on it. Studies show that BorActin applied to breeding media kills both fruit fly adults and the larvae living in it. Again, application as a dust is the fastest and most effective method. If Bio Sanitation treatment is also being provided to the account, then BorActin can be mixed at 4 oz per gallon with the foam or mop solution to provide proven small fly larval kill and provide two treatments in one. The active ingredient doesn’t breakdown, so BorActin is effective until removed.

  • Damp areas such as commercial kitchens, for small fly and roach control
  • Drain treatment for drain flies
  • Other damp areas, and areas with chronic organic debris