Question

Given below is the list of few chemicals that are used for the protection of crops
i) Dalapon
ii) Butachlor
iii) Malathion
iv) Simazine
v) Disyston
vi) Gammexane

How many of these are used as insecticides?
a. 3
b. 4
c. 2
d. 5

Answer 1

Hint: From the above-given chemicals, some of the chemicals are used as the herbicide i.e. a substance that is used to kill the plants. These chemicals are Dalapon, Butachlor, and Simazine. The rest of the chemicals are used as insecticides i.e. a substance that is used to kill insects.

Complete answer:
> Dalapon- 2,2-Dichloropropionic acid is the IUPAC name for Dalapon. It is a colorless organic compound used as a selective herbicide for controlling the perennial grasses. The major use of this chemical was on crops of sugarcane and sugar beet.

> Butachlor- It is an odorless liquid used as a herbicide. It is used as granules in rice.

> Malathion- It is an organophosphate insecticide. It is widely used in agriculture and also in pest control as mosquito eradicator.

> Simazine- It is used as a herbicide to control weeds and annual grasses.

> Disulfoton- It is used as an insecticide. The roots of the plant absorb these insecticides which provide long-lasting control.

> Gammexane- It is also known as Lindane that is used as both insecticides and in pharmaceuticals for the treatment of scabies and lice.

Hence, the correct answer is option (A).

Note: Insecticides are the substances used to kill the insects. The ovicides and larvicides are used against the larvae and eggs of insects. They are widely used in agriculture, industry, and medicine. The pesticides either kill or inactive the pests but many of them are toxic to animals and humans.