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It’s wasp season!
Though wasps can provide great control of plant feeding insects like aphids, their aggressive behaviour and stinging habits can be of some concern. Here are some tips for controlling wasps in your yard:
Life Cycle:

Wasps and bumble bees have annual colonies that last for only one year. The colony dies in the fall with only the newly produced queens surviving the winter. The new queens leave their nests during late summer and mate with males. The queens then seek out overwintering sites, such as under loose bark, in rotted logs, under siding or tile, and in other small crevices and spaces, where they become dormant. These queens become active the following spring when temperatures warm. They search for favorable nesting sites to construct new nests. They do not reuse old nests.


Wasp TrapsWasp TrapsTrapping Wasps:
In late summer, yellow jackets become aggressive scavengers and frequently disrupt outside activities. Keep food and drink tightly covered and use traps to help catch wasps.  Our Yellow Jacket and Wasp Trap ($11.99) comes complete with bait; simply mix with sugary water or juice to help attract and trap wasps. Colourful glass traps add a decorative touch, but be sure to mix in wasp attractant to make the traps more effective. Really want to attract those wasps to your trap? Add a little dose of protein such as tuna or raw hamburger to your trap.
Treating Nests:
Exposed wasp nests
Wasp nests that are visible and near human activity can pose a potential problem. If there is a concern about stings, you should eradicate the nest.
Doktor Doom Wasp & HornetApply a ready-to-use aerosol “wasp and hornet spray” such as Doktor Doom Nest Annihilator into the entrance of the nest during late evening according to label directions. To avoid pesticide falling down on yourself do not stand directly under the nest and spray up. Plan your escape route.  Be very careful if you must climb a ladder. If live wasps are still observed the next day, repeat the treatment.
Mechanical control without insecticides is possible for small, exposed nests. At night, cover the nest with a large, heavy, plastic bag and seal it shut. Cut the nest from the tree and freeze it.  Use caution: there is more risk involved in this procedure than in spraying the nest.
Do fake wasp nests help?
Yes and No!  These nests supposedly deter wasps from building a nest near them because of the territorial nature of these pests.  If the nests are placed early in the season when overwintering females wasps are looking for a nesting site, they may be effective.  Placing the nests later in the summer where you don’t want wasps will have little or no effect because wasps are no longer looking for a nesting location.
Ground wasp nests:
When yellowjacket wasps are found nesting in the ground, apply an insecticide into the nest opening. A residual/foaming product will ensure both those leaving the nest and entering will be treated. After you are sure all the wasps have been exterminated, cover the nest entrance with soil.
Old wasp nests:
Old nests are not reused by wasps. Wasp nests found during winter or early spring are old nests from the previous summer. There are no live wasps in the nest; they have already left  or died inside it. The nest can be safely removed and disposed of if desired.

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