Wasp and yellow jacket control in Modesto
A nest by the front door or yellow jackets going in and out of a hole in the lawn is worth dealing with before late summer, when they get more defensive.
Calls are answered early morning to late evening
How to recognize the problem
Yellow jackets are 1/2 to 1 inch long, with bright yellow and black jagged bands and a very narrow waist. They usually nest in the ground, often in an old burrow, or inside wall and ceiling spaces. Some build paper nests under eaves or in trees. Watch for wasps flying in and out of one spot.
Paper wasps are slender with long legs, and they build open umbrella-shaped nests under eaves. Mud daubers build hard mud nests on walls and rarely sting. If you think you have hornets, describe the nest and its size on the call.
When yellow jackets peak around Modesto
Queens start new nests when spring warms up, and colonies grow through midsummer. UC IPM says yellow jackets get more numerous and more defensive as summer ends. In fall they go after sweets and protein, so picnics, garbage cans, pet food and ripe fruit bring them in. A backyard with fallen stone fruit or figs is a draw.
UC IPM also says your local mosquito and vector control district may remove nests. The mosquito page lists the two districts here. It is worth asking them what they currently do.
What a wasp or yellow jacket visit usually involves
Every independent company works differently. This is the general shape, so you know what to ask about.
Locating the nest
The company finds the entry point, sometimes by watching the flight path. Tell them where you have seen wasps and at what time of day.
Dealing with the nest
The approach depends on where it is. A nest inside a wall needs more care than one hanging under an eave.
Keeping clear
Ask how long to keep people and pets away from the area, and whether doors and windows should stay shut.
Stopping the draw
Expect advice on covering food, sealing garbage cans and picking up fruit.
When to call
- The nest is near a door, a play area or a path you use.
- They are coming out of a wall, or into the house.
- The nest is in the ground where people walk or mow.
- Anyone at home has had a bad reaction to a sting.
Common questions
Should I knock the nest down myself?
UC IPM says a very small paper wasp nest can be knocked down early in the season. For anything bigger, or any yellow jacket nest, it warns that stings are likely even after dark, and that a professional reduces the risk.
What if someone gets stung?
Most stings cause pain and brief swelling. Call 911 for trouble breathing, swelling of the face or throat, or many stings at once.
Sources: UC IPM: Yellowjackets and other social wasps. Checked 4 November 2026.
Seeing it now? Make the call.
You will be connected with an independent pest control company that works in your area. Say what you have seen and where, then ask about the visit. Nothing is decided until you agree to it with the company.
Calls are answered early morning to late evening
Calls may be recorded. See the referral disclosure and privacy policy.