The contact herbicides are less effective to_________________?
Correct answer: B. Perenial plants
- A. Broad leaved weeds
- B. Perenial plants
- C. Seasonal plants
- D. All the above
Explanation
Contact herbicides act only on the plant parts they touch and are not transported effectively to underground roots or rhizomes. They are therefore less reliable against perennial weeds, which can regrow from these structures.
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