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Differentiate between fumigation and spraying.

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Fumigation Spraying
In this in a sealed area a highly lethal gas is sprayed which is quite harmful. In these gases that are used are not lethal to a very high extent.
In this area is sealed after the fumigation process and entry of persons is banned for a certain period of time. In this area is not sealed and it also allows entry of people just after few time.
This is performed in many laboratories or factories at a very large scale where biosafety is a major concern. It is performed in houses, fields just to control pests.
For example- Ethylene dibromide is used in fumigation process. For example- Malathion is used as a chemical in spraying.

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