Vegetation around lots provides shady resting areas for flies. Keeping weeds and grass mowed restricts the area inhabited by flies and makes sprays more effective. If fly breeding is occurring in drainage areas and debris basins which are too wet for the use of cleaning equipment, flood these areas with irrigation water occasionally. One-half inch of water on fly breeding areas for a few hours will drown fly larvae. All insecticides are poisonous and should be used with caution.
Concentrated insecticides are especially dangerous.
Some insecticides are registered for use on both crops and livestock. Use only products registered for use on livestock. Products registered for use on crops may be mixed with a carrier that would cause skin burning or be otherwise toxic to animals. Read and understand all use precautions, restrictions, treatment ages, treatment frequency, treatment-slaughter intervals, and other label warnings. Insecticides can be applied for fly control in several ways.