Advertisements
Advertisements
Question
What are pesticides and herbicides? Explain giving examples.
Solution 1
Pesticides are a mixture of two or more substances. They are used for killing pests. Pests include insects, plant pathogens, weeds, mollusks, etc., that destroy the plant crop and spread diseases. Aldrin and dieldrin are the names of some common pesticides
Herbicides are pesticides specially meant for killing weeds. For example, sodium chlorate (NAClO3), sodium arsenite (Na3AsO3), etc.
Solution 2
Pesticides are the chemical compounds used in agriculture to control the damages caused by insects, rodents, weeds and various crop diseases.
Example: Aldrin, Dilldrin, B.H.C etc.
Herbicides: These are the chemicals used to control weeds.
Example: Triazines.
APPEARS IN
RELATED QUESTIONS
Do you observe any soil pollution in your neighbourhood? What efforts will you make for controlling the soil pollution?
Assertion (A): Excessive use of chlorinated pesticide causes soil and water pollution.
Reason (R): Such pesticides are non-biodegradable.
Even though the use of pesticides increases crop production, they adversely affect living organisms. Explain the function and the adverse effects of pesticides.
In an aquatic ecosystem, maximum biomagnification would be observed in ______.
Lithosphere refers to the ______.
