If automatic treadle sprayers are used for daily applications, rates must be reduced according to label directions. Dust bags, oilers or feed additives are not generally satisfactory. Larvicides Applying insecticides to breeding areas is generally not recommended. The acidity of the material in the breeding area breaks down the insecticides rapidly. Feed additives are sold for control of stable flies.
Feed additives are insecticides which are incorporated into cattle feeds.
The insecticide passes through the digestive system of the animal which makes it available in the manure to control flies. This method does reduce house fly populations to some extent, particularly in the drier high plains feedlot areas, because they breed in fresh manure. However, stable flies breed in manure after the insecticide is no longer effective as do many house flies. Thus, feed additives are not effective for stable fly control in Nebraska and do not provide adequate control of house flies except perhaps in the Panhandle counties during dry years. For the past several years, commercial insectaries have been selling pteromalid wasps for control of flies.