Question map
Not attempted Correct Incorrect ★ Bookmarked
Loading…
Q17 (CDS-II/2014) Economy › Agriculture & Rural Economy › Agricultural pests diseases Answer Verified

Which one of the following types of pesticides is convenient to control stored grain pests ?

Result
Your answer: —  Â·  Correct: B
Explanation

Fumigants are the most convenient and effective type of pesticide for controlling stored grain pests because they act in a gaseous state, allowing them to penetrate deep into grain bulks, silos, and packaged commodities [2]. Unlike contact or stomach poisons, which require direct physical interaction with the pest or ingestion, fumigants like phosphine (aluminum phosphide) and methyl bromide can reach all life stages of insects, including those developing inside the grain kernels. This gaseous diffusion is critical for treating large-scale storage facilities where physical application of sprays is impractical [2]. While contact insecticides are used as residual protectants to prevent new infestations, fumigation is the primary method for eliminating existing infestations in stored products. Stack fumigation is specifically noted as a highly practicable and convenient method for treating stored grains in various storage environments [2].

Sources

  1. [1] https://npponepal.gov.np/progressfiles/Training-Manual-on-AlPH3-Fumigation_1549364287-1701156938.pdf
  2. [2] https://www.fao.org/4/x5065e/x5065E0g.htm
How others answered
Each bar shows the % of students who chose that option. Green bar = correct answer, blue outline = your choice.
Community Performance
Out of everyone who attempted this question.
61%
got it right
✓ Thank you! We'll review this.

SIMILAR QUESTIONS

CDS-I · 2005 · Q84 Relevance score: -2.22

Consider the following chemical compounds 1. Aluminium phosphide 2. Endosulfan 3. Malathion 4. Methyl bromide Which of these are used as fumigants ?

IAS · 2013 · Q2 Relevance score: -2.83

Improper handling and storage of cereal grains and oilseeds result in the production of toxins known as aflatoxins which are not generally destroyed by normal cooking process. Aflatoxins are produced by

CDS-I · 2010 · Q109 Relevance score: -3.62

Which one of the following chemicals is commonly used by farmers to destroy weeds ?

IAS · 2019 · Q39 Relevance score: -4.09

In India, the use of carbofuran, methyl parathion, phorate and triazophos is viewed with apprehension. These chemicals are used as