Which method is most effective for destroying insects in the storage of food grains, spraying or fumigation?

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Solution

Fumigation method:
The fumigation method is the method of removing harmful micro-organisms by filling an area with gaseous pesticides.
In the fumigation method, they react with the air's moisture and form the poisonous fumes that kill the pests. Therefore this method is most effective for destroying insects in the storage of food grains.
Spraying:
In the spraying method, the chemicals that have to be applied are entirely dissolved in water.

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Q. Question 17
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