Question:
The first confirmed occurrence of herbicide resistant strain of a weed species in US was associated with
The first confirmed occurrence of herbicide resistant strain of a weed species in US was associated with
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Herbicide resistance:
- First reported: Triazines (1970s).
- Common resistance: Glyphosate, ALS inhibitors.
- Resistance management is critical in weed control.
- First reported: Triazines (1970s).
- Common resistance: Glyphosate, ALS inhibitors.
- Resistance management is critical in weed control.
Updated On: Aug 27, 2026
- ALS inhibitors
- Bipyridilium
- Glycines
- Triazines
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Question:
This question tests knowledge of herbicide resistance in weeds.
Step 2: Detailed Explanation:
The first confirmed occurrence of herbicide resistance in weeds in the US was associated with triazine herbicides.
It was reported in 1970 in common groundsel (Senecio vulgaris) in Washington state.
ALS inhibitors (A): Resistance occurred later.
Bipyridilium (B): Paraquat resistance.
Glycines (C): Glyphosate resistance (more recent).
Thus, triazines were the first.
Step 3: Final Answer:
Thus, the first confirmed herbicide resistance was associated with triazines, which corresponds to option (D).
[0.5cm]
This question tests knowledge of herbicide resistance in weeds.
Step 2: Detailed Explanation:
The first confirmed occurrence of herbicide resistance in weeds in the US was associated with triazine herbicides.
It was reported in 1970 in common groundsel (Senecio vulgaris) in Washington state.
ALS inhibitors (A): Resistance occurred later.
Bipyridilium (B): Paraquat resistance.
Glycines (C): Glyphosate resistance (more recent).
Thus, triazines were the first.
Step 3: Final Answer:
Thus, the first confirmed herbicide resistance was associated with triazines, which corresponds to option (D).
[0.5cm]
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