Systemic herbicides are often used to control which weed types?

Systemic herbicides are often used to control which weed types?

• A. Both annual and perennial weeds
• B. Only annual weeds
• C. Only perennial weeds
• D. Weeds not absorbed by roots or foliage

Answer: (A)

Systemic herbicides work by being absorbed through the leaves or roots and then moving inside the plant to growing points and storage tissues. This internal movement lets the chemical reach parts of the plant that persist year after year, so it can kill perennial weeds by preventing regrowth from roots, rhizomes, or crowns, as well as kill annual weeds during their single growing season. That combination makes systemic herbicides effective for both annual and perennial weeds. The other options don’t fit because a weed not absorbed by roots or foliage wouldn’t be affected, and limiting to only one weed type ignores the ability of systemic products to reach and kill perennial underground parts as well as annual tops.

Systemic herbicides work by being absorbed through the leaves or roots and then moving inside the plant to growing points and storage tissues. This internal movement lets the chemical reach parts of the plant that persist year after year, so it can kill perennial weeds by preventing regrowth from roots, rhizomes, or crowns, as well as kill annual weeds during their single growing season. That combination makes systemic herbicides effective for both annual and perennial weeds. The other options don’t fit because a weed not absorbed by roots or foliage wouldn’t be affected, and limiting to only one weed type ignores the ability of systemic products to reach and kill perennial underground parts as well as annual tops.