Planting herbs such as, lavender, catnip, lemon balm and basil helps to repel deerflies and gnats, and adds a pleasant aroma to gardens and yards. Another method involves setting out a tray of vinegar and dish soap.
A tray of vinegar attracts insects, and the dish soap traps them. The mixture needs to be changed once the tray is full of insects. Candles and mosquito coils containing eucalyptus oil are effective at repelling insects, including flies. Eucalyptus-based insect repellents are also effective. Long-sleeve clothing and hats discourage insects from biting. Clothing may be sprayed with insect repellent containing DEET or eucalyptus oil for additional protection.