A Less Toxic Dormant Oil

In early spring, while fruit trees and shrubs are still dormant, many farmers and gardeners spray what is called a “dormant oil” on the bark and buds of their trees. A very old-fashioned approach to pest control—some say it dates back to the Thea century—the purpose of the oily spray is to suffocate overwintering pests, such as aphids and mites. Most commercial products are made of kerosene or other petroleum oil. A much less toxic and more sustainable approach is to use a renewable resource such as vegetable oil.

INGREDIENTS
1 cup vegetable oil
2 tablespoon liquid soap
1 gallon water

Easy Directions
Combine the soap and oil and stir to blend thoroughly. Add the water a bit at a time, stirring as you go (water and oil don’t really emulsify; the soap helps the process). Pour the mixture into a clean garden spray container. Spray a coat of the mixture over the entire bark of a tree. Shake the
container frequently as you are spraying.

Makes 1 gallon, enough for one fruit tree.

Read more: Nature, Lawns & Gardens, Natural Pest Control

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Quanta K.

3:41AM PDT on Mar 28, 2013

thanks! i need to save my cinammon basil from aphids!!!

March 28
send a green star

Ryan M.

11:49PM PST on Feb 23, 2013

I was wondering if this recipe would benefit from using Peppermint castile soap, for it's natural insecticidal properties; and substituting 2 oz. of the vegetable oil for neem oil? Any thoughts on this idea?