Which statement best describes systemic (translocated) herbicides?

Which statement best describes systemic (translocated) herbicides?

• A. They move within the plant to affect other parts
• B. They act only on the sprayed leaf
• C. They degrade quickly in soil
• D. They primarily affect soil microorganisms

Answer: (A)

Systemic (translocated) herbicides are designed to be absorbed by the plant at the site of application and then moved through the plant’s vascular system to other tissues. This movement lets the chemical reach growing points, roots, and developing tissues, so parts of the plant that weren’t directly sprayed are still affected and often killed. That’s why these products can control perennial weeds that regrow from roots or underground storage organs, even if only the foliage was treated. In contrast, products that act only on the sprayed leaf are contact herbicides, and products that degrade quickly in soil or target soil microorganisms describe different behaviors not defined by systemic translocation.

Systemic (translocated) herbicides are designed to be absorbed by the plant at the site of application and then moved through the plant’s vascular system to other tissues. This movement lets the chemical reach growing points, roots, and developing tissues, so parts of the plant that weren’t directly sprayed are still affected and often killed. That’s why these products can control perennial weeds that regrow from roots or underground storage organs, even if only the foliage was treated. In contrast, products that act only on the sprayed leaf are contact herbicides, and products that degrade quickly in soil or target soil microorganisms describe different behaviors not defined by systemic translocation.