Drione Dust works well in a dry environment, but Delta Dust is the best where there is any sign of moisture. Delta Dust is a synthetic pyrethroid insecticide dust that is water proof. One limitation of this control method is that the dust must be placed directly onto the pathway used by the ants. If, for example, the dust is placed on the floor plate and the ants are using an electrical conduit located three inches above the plate as their pathway, control will not be attained. Another problem with using dusts is their sensitivity to high moisture conditions.
Dusts have a tendency to cake or crust when they get damp.
This makes them ineffective since ants can then walk across them without picking any up on their bodies. Only Delta Dust is water proof. Spot Treatments of Infested Wood Spot treating infested wood with Bora-Care will quickly eliminate a localized carpenter ant infestation. Whenever practical, inject Bora-Care directly into the carpenter ant galleries. However, it is important to treat an entire infested area in order to reduce the possibility of colony relocation.