what kind of flowers do pyrethrins come from
The most commonly available pyrethrum-based insecticides contain extracts from the flowers called pyrethrins. The advantage in the vegetable garden is that a pyrethrin insecticide is effective against a wide variety of hard-to-kill insects like aphids, beetles, leafhoppers, and certain caterpillars.he source of pyrethrum is the flowers of Chrysanthemum cinerariaefolium, also called the Dalmation flower. Photo: Pam Peirce. The source of pyrethrum is the flowers of Chrysanthemum cinerariaefolium, also called the Dalmation flower.