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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.
Bonide Pyrethrin Garden Insect Spray uses the active ingredient Pyrethrins which is an organic compound derived from African Chrysanthemum flowers and can be used until the day of harvest. Use this product on plants in your lawn and garden including vegetables, fruits, ornamentals, flowers, and roses.onide Pyrethrin Garden Insect Spray is a non-selective insecticide, so it will kill all of your insect pests-honey bees included. To avoid this, apply the product at night when the bees are not active.