But do not use it in kitchens or in food handling and processing establishments where there is exposed food. Sticky fly strips or papers can also be used where appropriate. As a routine precaution remove all livestock from the building being sprayed. Spray the walls and ceilings with insecticide. Repeat when flies no longer drop from the surface because insecticide has lost its toxicity.
Some insecticides can be mixed and applied with whitewash.
Do not spray exposed Styrofoam insulation with the insecticide mixture. Flies Several products are approved for use as a feed or mineral additive to control flies. Enough insecticide remains in the manure to kill or prevent flies from completing their development. The insecticide must be mixed with either the feed concentrate or mineral mixture. For example, stirofos is registered to be fed at 70 milligrams per 100 lbs. of body weight per day.