Things You Will Need
When you notice aphids on a plant, kill them using a homemade solution instead of purchasing chemical insecticides that can harm the environment.
-
Puree a garlic clove and small onion in a food processor.
-
Pour the chopped onion and garlic into a large bowl. Add 1 tsp. of cayenne pepper and 1 qt. of water.
-
Stir the mixture to combine the insect spray ingredients.
-
Let the ingredients steep in the water for at least an hour.
-
Line a colander with cheesecloth. Sit a bowl under the colander to catch the liquid. Strain the mixture through the cheesecloth.
-
Pour the homemade insecticide into a spray bottle.
-
Apply the insect spray to all infested parts of the plant. Don't forget about the undersides of leaves.
-
Store the spray in the refrigerator for up to a week. Spray the solution onto affected plants every other day until you kill the aphids.