Yellow flies, notorious biters found in regions like Florida, are a summertime nuisance. Only the female yellow fly bites, leaving painful welts that can become infected. Unlike mosquitoes, their bite lacks anesthetic, making it intensely painful. They cut the skin with serrated mouthparts before drawing blood. This guide explores effective ways to combat these pests and reclaim your outdoor spaces.
Understanding Yellow Fly Behavior
Yellow flies are most active from April through June, although they can persist through November. Peak activity occurs during late afternoons and on cloudy days. They thrive near fresh water sources, wooded areas, and shady spots, often avoiding direct sunlight. Attracted to dark colors and movement, they don’t typically venture indoors. Understanding these habits is crucial for effective control.
A close-up of a yellow fly. Image courtesy of Canva.
Effective Yellow Fly Control Methods
Several strategies can help reduce yellow fly populations around your property:
Sticky Traps
Exploiting their attraction to dark moving objects, sticky traps are a simple solution. Hanging black inflatable balls coated with sticky glue can lure and trap yellow flies effectively.
A yellow fly trap. Image taken on site at SWCMCD.
Chemical Control
Insecticides containing Permethrin, Carbaryl, or Malathion can offer temporary relief. Spraying these chemicals near infested areas can reduce the number of adult flies. However, this method provides only short-term control as yellow flies can travel significant distances. Furthermore, insecticide use is not recommended near breeding sites to avoid harming other aquatic life.
Vegetation Management
Since yellow flies prefer shade, trimming shrubs and small trees around your home can increase sunlight and make the area less attractive to them. Creating a more open and sunny environment can deter these pests.
A map illustrating a coastal region.
Conclusion
Dealing with yellow flies requires a multifaceted approach. By understanding their behavior and implementing a combination of sticky traps, targeted chemical control, and vegetation management, you can significantly reduce their presence and enjoy a more comfortable outdoor experience. Remember to always follow product instructions carefully when using insecticides.
