To make a dish soap spray, take an empty spray bottle and add 4 tablespoons of dish soap, 2 cups of white vinegar to it, then add 1 cup of warm water, shake the mixture and your dish soap spray is ready. Spray it on horse flies and watch them dying instantly.
Make a homemade horsefly repellent by mixing a pint of white vinegar with 2 ounces baby oil and a squirt of dish soap in a spray bottle. Apply to skin or clothing when outdoors near areas of horsefly activity.
Attraction. Horse flies are common around swimming pools because the water has a shiny surfaces, motion, is dark, has carbon dioxide and is warm. Horse flies are visual, and are initially attracted by the shiny, moving surface of the water.
These flies apparently are attracted to such things as movement, shiny surfaces, carbon dioxide, and warmth. Once on a host, they use their knife-like mouthparts to slice the skin and feed on the blood pool that is created.
Both deer flies and horse flies will actually burrow into your hair to bite your scalp. Wearing a hat will block them from biting the top of your head. And if your hat has a brim, it may keep flies off your face, ears and neck, as well.
Warblers are insectivorous birds that eat spruce budworms and horseflies. Their population often fluctuates in proportion to the population of insects they eat. There are about 50 different species of warblers. They are small songbirds with white underparts, green backs, and sport a white line over their eyes.
The smoke and scent released from the citronella oil can help keep horse flies away.
TL;DR (Too Long; Didn’t Read)
In both species, only the females bite to feed on blood; the males feed on plant products. The insects leave saliva under the skin as they feed. The saliva briefly thins the blood and prevents it from clotting so that it is easier to feed on.
Smells We Like, They Don’t
Look for other ingredients in sprays — or make your own with natural oils — that are believed to be offensive to horse flies. These include peppermint, eucalyptus, lavender, clove, rosemary, basil, tea tree, lemongrass, catnip and cedar.
Their larvae feed on decaying organic matter in moist soil, so horse flies are frequently found in swamps or near streams and ponds. If you can’t avoid their habitat, schedule your activities to avoid the flies. Horse flies are active during the day; they can’t find their hosts at night.
Horse fly development sites are freshwater and saltwater marshes and streams, moist forest soils and even moist decomposing wood. Females usually deposit egg masses on wet soil or vegetation that overhangs water. Larvae are active in moist or wet organic matter and look similar to house fly maggots.
‘Horsefly females have such strong, powerful mouthparts that they can sometimes bite you through your clothes,’ he says. ‘But obviously they are more likely to go for bare skin. ‘ It’s probably best to opt for loose-fitting clothing.
In addition to having a painful bite, deer flies and horseflies are fast, strong flyers. They are notably faster than mosquitoes or blackflies, making them a bane of runners and cyclists. And they don’t just follow you. … You can try to outrun them, but these flies hunt by sight and are attracted to movement.