How to Make Pyrethrum Insecticide

By Home & Garden Last updated Monday, April/15/2024

1). Harvest pyrethrum blossoms when the plant has just begun to blossom; this will maximize the amount of pyrethrins blossoms you can gather.
2). Let the blossoms air dry in an enclosed, dry area.
3). Grind the dried petals with a mortar and pestle until they are a fine powder. You could also use an old coffee grinder or blender.
4). Pour 2.5 ounces of the powder into a gallon of alcohol. Shake the mixture vigorously to mix.
5). Allow the mixture to sit for two or three days, shaking it as often as possible.
6). Strain mixture through the coffee filter and into the empty gallon container. Transfer the mixture into a spray bottle if desired.

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