GAINESVILLE, Fla., Sept. 23 (UPI) -- New research suggests ranches, farmers and horse owners don't have to resort to the use of pesticides to control fly populations. Parasitic wasps work just as well, scientists say.
Filth flies, like house and stable flies, agitate horses and spread disease. When swarms get too large, some caretakers use pesticides and insecticides, but use of these chemicals can damage the environment. One way to curb pesticide use is to find suitable biological control agents to take their place.