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Question
Even though the use of pesticides increases crop production, they adversely affect living organisms. Explain the function and the adverse effects of pesticides.
Solution
Pesticides are the chemicals that are used to kill or stop the growth of unwanted organisms. But these pesticides can affect the health of human beings. Pesticides are classified as
- insecticides,
- Fungicides and
- Herbicides.
- Insecticides:
Insecticides like DDT, BHC, Aidrin can stay in soil for a long period of time and are absorbed by the soil. They contaminate root crops like carrot, radish. -
Fungicides:
Organomercury compounds dissociate in soil to produce mercury which is highly toxic. -
Herbicides:
They are used to control unwanted plants and are also known as weed killers. Eg, Sodium chlorate, sodium nitrate. They are toxic to mammals.
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