Pyrethrum, used to control fleas, is derived from which type of plant?

The correct choice is based on the fact that pyrethrum is a natural insecticide derived from the flowers of certain species of chrysanthemums, specifically Chrysanthemum cinerariifolium and Chrysanthemum coccineum. The active compounds known as pyrethrins, which are highly effective against a variety of pests including fleas, are extracted from these flowers.

Understanding the origin of pyrethrum is significant in the context of pest management, particularly because this natural insecticide is favored for its effectiveness and reduced toxicity to humans and pets compared to synthetic alternatives. Knowledge of plant sources for various pesticides is essential for responsible and informed use in pest control strategies.