How do you make pyrethrin extract from pyrethrum flower?

To make pyrethrin extract from pyrethrum flowers, begin by drying the flowers to reduce moisture content. Next, grind the dried flowers into a fine powder. Then, soak the powdered flowers in a solvent such as ethanol or hexane to extract the active compounds. Finally, filter the mixture to separate the liquid extract from the solid material, yielding a concentrated pyrethrin solution.