Why is pyrethrum considered an important insecticide?

Pyrethrum is considered an important insecticide primarily due to its low toxicity to humans and other non-target organisms. This characteristic allows it to be used effectively in various settings, including homes, gardens, and agricultural fields, without posing significant risks to human health when used as directed.

The active compounds in pyrethrum, known as pyrethrins, are derived from chrysanthemum flowers and are known for their ability to disrupt the nervous system of insects while being relatively safe for mammals. This safety profile contributes to its popularity as a natural insecticide and makes it suitable for organic farming practices, where chemical insecticides may be restricted.

In contrast, while pyrethrum can have some residual effects, it generally decomposes more quickly than synthetic pesticides, which might limit its effectiveness in long-term pest control compared to options with longer-lasting residues. Additionally, pyrethrum typically has a mild odor, which is not as prominent as some synthetic insecticides, but is present nonetheless. Lastly, while pyrethrum is effective, its potency can vary in comparison to various chemical insecticides; however, the emphasis on lower toxicity to humans remains the primary reason for its significance in pest management.