PADCORP'S ULV cold fogger is a device is based on aerosol, air-shear (mist-blowers, exhaust gas sprayers), or much better, rotary nozzle techniques. Electrostatic charging can be added to droplets to assist their propagation and effect (on earthed targets).
ULV Sprayer 5 to 50 Micron, RPM - 20,000, Single Phase Motor Useful for water / Oil Based Spraying