If the trichomes get in contact then it will be in the end product, most probably. Most pyrethrum products are on plant oil base and this will mess with the resin. Even without oil you certainly don't know how this reacts with resin. The info on the bottles are only for vegetables, not for resin producing plants.I have used Phytoseiulus persimilis predatory mites after I've knocked down the population with Evergreen Pyrethrum. Real pyrethrum has a half life of 3 days. It will not be in your end product. It's the only control method I've found that actually worked in my greenhouse.
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