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Define the term pesticides? What are three categories of pesticides? |
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Answer» Pesticides are substances which are used to kill or block the reproductive process of unwanted organisms. The three main categories of pesticides are:- (i) Insecticides: These are used to control insects and curb diseases and protect crops. (ii) Herbicides: These are used to kill weeds. Example- sodium chlorate (NaCIO3), sodium arsenite (Na3AsO3) (iii) Fungicides: These are used to check the growth of fungi. Example-methylmercury |
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