How to Make Insecticide


If pests are a problem in your garden, you may need to use insecticide. To make an insecticide at home, you'll need some spicy ingredients. Once your homemade insecticide is sprayed on plant leaves, no bugs will want to take a bite and should move on to other plants. This mixture should work well for any insect, from aphids to whiteflies.

Step 1

Chop the cloves of garlic finely and place them in the bowl followed by the onion, also chopped finely. Add one tablespoon each of cayenne pepper and the dish liquid, as well as a quart of warm water.

Step 2

Stir the mix slowly without making suds with the dish liquid, but enough that it is thoroughly mixed. Leave the bowl to sit overnight.

Step 3

Set the strainer over the measuring cup. Pour the mixture from the bowl into the strainer to allow only the liquid portion into the measuring cup. Discard the onion and garlic that gets caught in the strainer.

Step 4

Transfer the liquid from the measuring cup to the spray bottle. Use masking tape and a permanent marker to label the bottle clearly so it won't be used mistakenly.

Step 5

Spray the mixture on the tops and undersides of dry leaves on a day when rain is not in the forecast. Use the spray as often as needed.

Things You'll Need

  • Six cloves of garlic
  • Knife
  • Bowl
  • One small onion
  • Tablespoon
  • Cayenne pepper
  • Liquid dish soap
  • One quart warm water
  • Wire mesh strainer
  • Large measuring cup
  • Empty spray bottle
  • Masking tape
  • Permanent marker


  • "Giant Book of Garden Solutions"; Jerry Baker; 2003
Keywords: make insecticide, homemade insecticide, making your own insecticide, bug killer

About this Author

Margaret Telsch-Williams is a freelance, fiction, and poetry writer from the Blue Ridge mountains. When not writing articles for Demand Studios, she works for as a contributor and podcast co-host.