Applications with foggers and mist blowers can overcome these problems. With these types of applications, a small quantity of concentrated pesticide is propelled as an aerosol made up of very small spray particles. The concentrated aerosol can then be applied evenly over the animal's body, greatly reducing the amount of liquid used. Another method of application is the use of pour-on insecticides, in which a small quantity of pesticide is poured down the backline of the animal. The most popular application method for lice is dusting by hand.
Dusts are easy to apply, require no mixing, and can be used year-round.
Insecticides must be used properly to achieve satisfactory control of lice. The second treatment is essential to kill newly hatched lice that were present as eggs at the time of the first treatment and were therefore not killed.