pyrethrum
/paɪˈriːθrəm/
noun
- A type of chrysanthemum plant whose flowers are used to make natural insecticides.
- Gardeners often grow pyrethrum near vegetables to repel harmful insects.
- The dried and powdered pyrethrum flowers are used in organic pest control.
- Pyrethrum plants have white and yellow daisy-like flowers.
- An insecticide made from the dried flowers of the pyrethrum plant.
- Pyrethrum has been used for centuries to control lice and fleas.
- This spray contains pyrethrum and is safe for use around pets.
- The farmer applied pyrethrum to the tomato plants to kill whiteflies.