Stable Flies Stable flies look like house flies. However, their mouthparts are adapted for piercing the skin of animals and sucking blood. They spend most of their time resting on walls, fences, sheds, and other surfaces much as house flies do. They are best controlled by treating these surfaces with a residual spray. The same insecticides recommended for house flies should be used for stable flies.
Stable flies breed in decaying vegetable matter and in manure, if mixed with straw.
Clean up these breeding places to help control these pests. Use gloves, and wash hands soon after using. Bags Forced use is more effective than free choice. Position bags 6 inches lower than the height of the cows. Protect the dust bags from the weather.