Vinegar as a bug repellent. Vinegar is one of the best ingredients to make a pest control spray. ... Acidity of the vinegar is potent enough to kill many pests. Vinegar is often used as a contact type insecticide, which means that you need to spray it directly onto the spotted bug to make it effective.

What insects does vinegar kill?

Regular household vinegar is harmless to humans, and you can use it to get rid of ants, spiders, fruit flies and aphids in your home and outdoor buildings.

Is it safe to spray plants with vinegar?

No, you can't spray houseplants with vinegar, it's not safe. Vinegar will dry out the leaves and it will give the plant a really hard time to recover. Furthermore, if the vinegar gets in the soil, it will kill the plant altogether.