NOUN
- spring-flowering garden perennial of Asiatic origin having finely divided aromatic leaves and white to pink-purple flowers; source of an insecticide; sometimes placed in genus Chrysanthemum
- made of dried flower heads of pyrethrum plants
- white-flowered pyrethrum of Balkan area whose pinnate leaves are white and silky-hairy below; source of an insecticide; sometimes placed in genus Chrysanthemum
How To Use pyrethrum In A Sentence
- Or investing in the agricultural sector so farmers are more able to meet demand for crops like Artemesia annua and pyrethrum, easily-grown botanical ingredients in anti-malarial drugs? Global Voices in English » Global Health: Twitter Face-Off To Fight Malaria
- Others are synthetic versions of naturally-occurring insecticides, such as those found in the plant pyrethrum.
- You can purchase concentrated pyrethrum from a nursery or the garden supply section of your supermarket.
- Rotenone and pyrethrum don't work, even if applied more frequently.
- American consumers - and especially the military, which had used pyrethrum for delousing front-line troops - howled for the development of a suitable substitute.
- By the mid 1800s, the heads of chrysanthemum flowers were used to obtain pyrethrum, and rotenone was extracted from the derris plant.
- Some are derived from plants, such as pyrethrum and neem.
- This is the area where significant cash crops are grown, including pyrethrum (a flower that produces a natural insecticide), coffee and tea.
- By the mid 1800s, the heads of chrysanthemum flowers were used to obtain pyrethrum, and rotenone was extracted from the derris plant.
- Pesticides that are approved for organic farming include copper, sulfur, petroleum distillates, and pyrethrum.
