Subtopic: Controlled and modified atmosphere storage
Question Statement:
Which one of the following chemicals is NOT used for fumigation in either horizontal or vertical storage structures to kill insects?
Options:
(A) Methyl bromide
(B) Phosphine
(C) Phostoxin
(D) Silver sulphate
Official Answer Key:
D
Step-by-Step Solution & Explanation
Methyl bromide and phosphine (PH₃) are the two classical grain fumigants; Phostoxin is the trade name of an aluminium phosphide formulation that releases phosphine.
Silver sulphate is a laboratory reagent with no fumigant action and is not registered for grain storage.
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