A cheap and highly effective solution is a simple mixture of dish soap and water. Blend two tablespoons of dish soap into a water-filled spray bottle and shake. Spray the mixture onto nests or individual wasps: the soap will clog the bugs' pores and kill them immediately.
Essential oils – Wasps dislike the scent of essential oils, and some can even kill them. Prepare 5 ml of lemongrass, peppermint, or citronella oil with 4 ounces each of vinegar and water. Put the mixture in a hose-end sprayer and spray over the entry points of the nest.
Use soap and water
Mix two tablespoons of dish soap into a spray bottle of water and spray it on the nests. The mixture will clog the wasps' breathing pores and kill them instantly.
To kill wasps with vinegar, apple cider vinegar works best due to the concentration of fruit juices. You can build a small outside trap with a bowl of apple cider vinegar to lure the insects into the bowl and cause the wasps to drown.
Use WD-40
WD-40 can be use to both kill wasps and stop them from nesting. Wasps are territorial, so will return to the same nesting spot every year. To keep wasps from returning, spray any former wasp next spots with WD-40. Apply it liberally underneath gutters, and anywhere you have spotted wasps congregating.
Soap & Water
Mix 2 tablespoons of dish soap in a spray bottle and fill with water. The soap will clog their spiracles, the pores that they breathe through, and will kill them almost immediately.
Wasps also don't like vinegar. As a wasp deterrent, some people place an equal mix of water and white vinegar in a spray bottle. They then spray the wasps to get them away. While this method may be somewhat effective, it's also dangerous.
Windex is very effective for killing most types of bugs inside of the home. It's a bit less effective on Wasps for some reason, but many will die and those that do not will be slowed enough that you can easily trap them or slap them.
Lemon extract is an effective wasp killer and pesticide. For the best results, combine 3 tablespoons of lemon extract and 1 cup of water. Add this solution to a plastic spray bottle for a quick, easy, and lethal insecticide. If you want to create an effective repellent, reduce the amount of lemon extract by half.
To kill flys, bees, hornets and wasps, spray with Windex. On housefly's it usually only takes a small whiff to knock them out of the air and kill them. Wasps will fall right away too but you may need to hit them with another dose.
Wasps have a strong sense of smell and dislike certain plants like peppermint, spearmint, basil, eucalyptus, cloves, geranium, thyme, citronella, bay leaves, and lemongrass. They are also repelled by vinegar, cinnamon, coffee grounds, and sliced cucumber.
What Kills Wasps Instantly? Soapy water kills wasps by suffocating them, and bleach water has a similar fatal effect on them.
Citrus - Citrus fruits like lemons and oranges can help deter wasps around your yard. Peppermint oil - Peppermint oil is one of the most effective essential oils for keeping wasps away. Citronella - Citronella oil is also effective, as it has a strong citrus smell that wasps do not like.
Spraying the nest with a garden hose from afar is a quick solution to your wasp problem. All you have to do is spray the nest with the most jet-like water setting and since the nests are made of papery substance, they'll get destroyed. The remaining wasps will fly away in terror, never to come back.
Simply get a spray bottle and fill it with water and add a few tablespoons of fairy liquid. Then in the evening or at night when the wasps are the most calm you will want to spray at the nest. The way it works is the soap clogs the breathing so they die almost instantly.
Hairspray does not kill wasps per se but it does stick their wings together, so they drop to the ground unable to fly. Possibly you could use hairspray to dispatch one wasp from your house but it's not going to work against the whole nest full of insects.
If you'd like to try this “natural” wasp killer for yourself, you'll first need an empty spray bottle. Then, according to Griffith, add 10 ounces of water to the bottle and 2 ounces of the Dawn dish soap. Close the bottle and shake to combine—frothy bubbles are OK, as shown in the video below.
I bait my trap with a few inches of this mixture: 3/4 cup white vinegar, 2 tablespoons sugar, 1 teaspoon salt. Then I set it on my deck or hang it in a tree—anywhere wasps appear.
What kills wasps instantly? Washing up liquid and water sprayed directly into the hive, pesticides and insecticidal dust are all effective methods for killing wasps within a few minutes.
A cheap and highly effective solution is a simple mixture of dish soap and water. Blend two tablespoons of dish soap into a water-filled spray bottle and shake. Spray the mixture onto nests or individual wasps: the soap will clog the bugs' pores and kill them immediately.
Use the vinegar and dish soap mixture in a spray bottle to kill individual wasps. Carry a plastic spray bottle of the mixture with you while working in the garden or enjoying time outdoors to deal with pesky wasps on the spot. Spray the wasp until it is saturated and no longer moving.