Tick and Mosquito Season in Washington County: What Actually Works

This is a county of wooded ridges and creek valleys pressed against towns — the Springfield Plateau meeting the Boston Mountains, with karst terrain that drains fast after rain and storm-driven standing water through late spring. Tick precautions here are ordinary routine from March through September, not an exception reserved for backcountry trips.

Mosquitoes run a longer leash: roughly April through October, peaking mid-summer, breeding in whatever standing water the spring storms and summer irrigation leave behind.

The lone star tick leads the local cast and is an aggressive human biter. Adults seek hosts from mid-March through late June, nymphs from mid-May through late July, and larvae from July through September — three overlapping waves that fill almost the entire warm half of the year.

Two other ticks share the ground. The American dog tick carries its highest bite risk in spring and summer and can transmit tularemia and Rocky Mountain spotted fever. The blacklegged tick is active spring through fall and can transmit Lyme disease and other pathogens. The invasive Asian longhorned tick has also been found in Arkansas, though its role in transmitting pathogens to people in the United States is still under study.

Only female mosquitoes bite, and they can transmit pathogens including West Nile virus; nuisance species bite just as painfully without spreading anything. Either way, the mosquitoes in a yard come from water on or near the property — storm water in creek bottoms, clogged gutters, containers, irrigation runoff, low spots that hold a week after the rain stops.

That is the useful part: the immature stages cannot develop without standing water, so what a household does about water changes how much of the summer it spends swatting.

For ticks, the standard precautions are the standard because they work: treated clothing, repellent on skin, and checking yourself, your children and your pets after time outdoors. No yard treatment replaces that routine — ticks travel in on wildlife and people, and the treated area ends at the property line.

For mosquitoes, source reduction and treatment work together. Dump standing water after every storm, keep gutters moving, and cut back brush near seating areas; a seasonal program handles the adults resting in the shaded foliage the habits cannot reach.