Question

Insecticide pyrethrum is obtained from
A. Artemesia
B. Tragopogon
C. Crysanthemum
D. Carthamus

Answer 1

Hint: The pyrethrins are pesticides that are found naturally in some flowers. In addition, the pesticide is obtained from a plant also known as mums or crysanths.

Step by step answer:Insecticide pyrethrum, as the name, suggests they are natural insecticides that are used to kill pests that come onto the flowers. They target the nervous system of insects such as mosquitoes, fleas, flies, ants, and many other pests.
Let us consider each of the above options and find out the correct answer.
Option A, Hardy herbaceous plants and shrubs are included in Artemesia which belongs to the daisy family Asteraceae.
Option B, Tragapogon comes under the genus of flowering plants in the sunflower family. It mainly includes salsifies and common wildflowers.
Option C, the genus Chrysanthemum, consists of flowering plants and belongs to the family Asteraceae. Pyrethrins are a class of organic compounds that are derived from Chrysanthemum cinerariifolium and possess strong insecticidal activity.
Option D, the genus Carthamus includes plants that come under the thistle family.
Hence, the option C is the correct answer. Insecticide pyrethrum is obtained from the genus Chrysanthemum

Note: The pyrethrum and pyrethrins are two distinct things. Pyrethrins are compounds that together form pyrethrum. Even though insecticide pyrethrum is toxic to pests they are non-toxic to human beings. They are commonly used in organic farms.