Question:
Which of the following herbicides is a contact herbicide?
Which of the following herbicides is a contact herbicide?
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Contact vs. Systemic herbicides:
- Contact: Nitrofen, Paraquat (kill only contacted tissues).
- Systemic: Butachlor, Glyphosate (move within the plant).
- Contact: Nitrofen, Paraquat (kill only contacted tissues).
- Systemic: Butachlor, Glyphosate (move within the plant).
Updated On: Aug 27, 2026
- Butachlor
- Bispyribac sodium
- Thiobencarb
- Nitrofen
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Question:
This question tests knowledge of herbicide types based on mode of action.
Step 2: Detailed Explanation:
Nitrofen is a contact herbicide.
It acts on contact with plant tissues and causes rapid desiccation.
Butachlor (A): Pre-emergence herbicide (systemic).
Bispyribac sodium (B): Systemic herbicide (ALS inhibitor).
Thiobencarb (C): Pre-emergence herbicide (systemic).
Thus, nitrofen is a contact herbicide.
Step 3: Final Answer:
Thus, the contact herbicide is Nitrofen, which corresponds to option (D).
[0.5cm]
This question tests knowledge of herbicide types based on mode of action.
Step 2: Detailed Explanation:
Nitrofen is a contact herbicide.
It acts on contact with plant tissues and causes rapid desiccation.
Butachlor (A): Pre-emergence herbicide (systemic).
Bispyribac sodium (B): Systemic herbicide (ALS inhibitor).
Thiobencarb (C): Pre-emergence herbicide (systemic).
Thus, nitrofen is a contact herbicide.
Step 3: Final Answer:
Thus, the contact herbicide is Nitrofen, which corresponds to option (D).
[0.5cm]
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