CBSE Class 9 Answered
What are fumigants how are they used?
Asked by | 24 Aug, 2012, 08:21: PM
Expert Answer
Fumigant is a pesticide that is a vapor or gas or that forms a vapor or gas when applied and whose pesticidal action occurs in the gaseous state. Fumigants are used to kill insects, nematodes, fungi, bacteria, seeds, roots, rhizomes, or entire plants. In fumigation, the fumigant is dispersed within an enclosed area and maintained at a prescribed concentration for a specified period to eliminate target pests.
Fumigation usually involves the following phases:
- First the area to be fumigated is usually covered to create a sealed environment
- Next the fumigant is released into the space to be fumigated
- Then the space is held for a set period while the fumigant gas percolates through the space and acts on and kills any infestation in the product
- Next the space is ventilated so that the poisonous gases are allowed to escape from the space, and render it safe for humans to enter
- If successful, the fumigated area is now safe and pest free.
Answered by | 27 Aug, 2012, 10:25: AM
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