Few pesticides are used in the originally produced concentrated forms. Most of these compounds must be specially formulated to permit adequate and effective application. Virtually all preparation of concentrated material for military use is done commercially. Dilution of the concentrate with oil or water is all that is normally required. Selection of the proper formulation for a specific control measure is as important as the choice of pesticide.
Oil solutions consist of the toxicant mixed into a petroleum based diluent.
They are effective for penetrating cracks and crevices. They may be used around electrical equipment or power distribution panels, but the oil must not contact the wiring or insulation because of its solvent properties. These solutions may be used where dampness or water cause problems or where there is a need to apply insecticides in cold weather. Oil solutions are also applied as space aerosols or sprays either indoors or outdoors for knockdown or kill of insects. Space sprays are effective against flying insects only while the particles remain suspended in the air.