If you are noticing more roach activity than usual, it is because immediately after beginning treatments, they will try to escape from the chemicals that are killing them. When applying insecticides such as Alpine WSG, the knockdown rate will be depend on how long the insect stayed on a treated surface and the age and health of the insects. In most cases, you can expect death in 24-72 hours.
Alpine WSG can be applied 3ft up and 3ft out from the foundation for general insect control.
Alpine WSG is not labeled for gnats or midges. You may consider using Talstar P Professional Insecticide instead. It will leave a 30 day residual outdoors that will control noseeums that come in contact with treated areas
Alpine WSG can be mixed with a synergist such as ExciteR Insecticide but it is not generally recommended. ExciteR kills on contact while Alpine WSG leaves a non repellent residual that they take back with them. If you kill them too soon they will not have a chance to take it back with them