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Name two methods by which mosquito popul...

Name two methods by which mosquito population can be controlled to prevent malaria .

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(i)Ponds, drainage ditches and other permanent bodies of water can be stocked with fishes such as Gambusia which feed on mosquito larvae .
(ii)Preparations containing Bacillus thuringiensis can be sprayed to kill the mosquito larvae since it is not toxic to other forms of life.
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