Current weather and delay conditions for (GRU) Sao Paulo-Guarulhos International Airport Conditions
Use vinegar as a natural fly spray for your horse. You can use 2 cups of vinegar with 1 cup of water and 1 cup of Avon Skin So Soft bath oil mixed with 1 tbsp. of Eucalyptus oil. You can also add a tbsp. or two of citronella oil to this mixture. Shake it well and then spray on your horse.
1 A third design is a flexible curved blade with teeth on one side to use as a shedding blade, and smooth on the other, for use as a sweat scraper.  Fly spray: In the summer, fly spray is often applied to the horse after grooming. Care must be taken to avoid the eyes and mucous membranes.