Removing what draws wasps in, mainly uncovered food, open drinks, and garbage, is the most effective way to keep them off a patio. A decoy nest and a bait trap hung well away from seating and flowers handle the rest, without the broad spectrum sprays that kill bees along with wasps.
Why Do Wasps Show Up on Patios in Late Summer?
Wasps show up on patios in late summer and early fall because their colonies are at full size and the workers switch to scavenging for food. At that point in the season they are especially drawn to sweet things, which brings them to picnic tables, barbecues, garbage cans, outdoor pet food dishes, and fallen ripe fruit. Earlier in the year the same wasps spend most of their time hunting other insects, which is why the problem seems to appear suddenly.
How Can Wasps Be Told Apart From Bees?
Yellowjackets, the wasps most likely to land on a plate, are about 1.3 to 2.5 cm long with jagged, bright yellow and black stripes and a smooth, shiny body. Honey bees are less brightly striped and noticeably hairier. A honey bee usually ignores food on a table, although it may visit a spilled sweet drink, so an insect working through a burger or a piece of fruit is almost always a wasp.
What Keeps Wasps Away From Food on a Patio?
Keeping food covered or indoors, including pet food, takes away the main reason wasps visit. Soda cans and juice glasses should stay covered too, since wasps crawl inside open cans where they are easy to miss before the next sip.
Garbage and recycling bins with sealed lids, emptied regularly, stop a patio from becoming a reliable food source. Picking up fallen fruit from nearby trees and rinsing away spilled sweet drinks removes the smaller attractants that keep wasps returning between meals.
Do Decoy Wasp Nests Work?
Decoy nests rely on the idea that wasps avoid settling near what looks like a rival or predator's nest, and the evidence that they work is mostly anecdotal rather than tested. Because a decoy uses no bait and no chemicals, it carries no risk to bees, which makes it a low cost thing to try alongside food control rather than a replacement for it.
Before new nests get started in spring, hanging a Natural Wasp Away decoy near the patio gives scouting wasps something that looks like a hornet's nest, a shape its maker says wasps treat as a predator and avoid.
Where Should a Wasp Trap Go So It Does Not Catch Bees?
A wasp trap works best at the edge of the property, as far from the patio as possible, because a baited trap draws wasps toward it and away from where people are sitting. Keeping it away from flowering plants matters just as much, since a sweet bait can also attract a foraging bee.
To pull wasps away from the table, the Yellow Jacket, Wasp and Hornet Trap is filled with sugar water or a non citrus juice, plus an optional pea sized piece of protein such as fish or hamburger, and hung away from food areas and out of reach of children and pets. Urban Nature Store sells it as a reusable trap, so the same unit can be emptied and rebaited through the season. Traps reduce the number of foraging wasps around a yard but do not eliminate a large population, which is why food control still does most of the work.
What Should Be Avoided to Protect Bees?
Broad spectrum insecticide sprays kill whatever insect they touch, so spraying a patio, railing, or nearby flowers exposes any bee that lands there afterward. Nonchemical steps such as covering food, sealing garbage, decoys, and well placed traps keep a patio usable without that risk.
A nest close to a doorway, play area, or seating is best handled by a pest control professional rather than knocked down or sprayed by hand, since disturbing a nest provokes the whole colony.
Frequently Asked Questions
Can a wasp trap be put out before wasps become a problem?
Yes. Traps set out in early spring catch queens before they start new colonies, which can mean fewer workers around the patio by late summer.
Does a decoy need to go up again every year?
Yes. The maker's guidance for Natural Wasp Away is to keep using it every year, so it belongs back near the patio each spring.
How long does a wasp nest last?
One season. Wasp colonies normally live only a single season, so a nest well away from doors and seating can often be left alone until it dies off in the fall.
Are wasps useful in a garden at all?
Yes. Yellowjackets prey on other insects, including many garden pests, so the goal is keeping them away from the table rather than eliminating them from the yard.
