Question:
Which of the following pesticide is not used in storage warehouses?
Which of the following pesticide is not used in storage warehouses?
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Systemic insecticides (like Dimethoate) are never applied to harvested stored grains or storage surfaces due to residue retention. Only contact pesticides with safe degradation profiles are permitted.
Updated On: Aug 18, 2026
- Malathion
- Dimethoate
- Deltamethrin
- Dichlorvos
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Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
Pesticides used in stored grain facilities must have low mammalian toxicity, low persistence on food grains, and should not leave toxic residues.
Step 2: Detailed Explanation:
Dimethoate is a highly systemic organophosphate insecticide used primarily on standing field crops to control sucking pests.
Because of its systemic nature and safety constraints, it is not registered or used in indoor grain warehouses/storage units due to residual hazard.
In contrast:
- Malathion and Deltamethrin are widely used for surface spray treatments of warehouse walls/bags.
- Dichlorvos (DDVP) is used as a space fumigant/spray because of its high vapor action.
Step 3: Final Answer:
The pesticide not used in storage warehouses is Dimethoate, which corresponds to option (B).
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