Question

An example of transferred herbicide is

• A. Bromosil
• B. Thiocyanate
• C. Paraquat
• D. Gammexane

Hint:

Systemic (transferred) herbicides are particularly effective against perennial weeds because they travel down to the roots and underground tubers, preventing the plant from regrowing.

Answer 1

The Correct Option is A

A transferred herbicide (also known as a systemic herbicide) is a chemical that is absorbed by the roots or foliage of a plant and then translocated (moved) through the vascular system to other parts of the plant, such as the roots or growing tips, to ensure a complete kill.
Step 1: Analyze the options.
(A) Bromosil: This is a substituted uracil herbicide that acts systemically. It is absorbed primarily through the roots and is translocated throughout the plant, inhibiting photosynthesis.
(B) Thiocyanate: Generally acts as a contact herbicide or a non-selective chemical, often used in industrial settings rather than as a standard systemic agricultural herbicide.
(C) Paraquat: A very famous "contact" herbicide. It only kills the green tissue it touches and does not move significantly through the plant's vascular system.
(D) Gammexane: This is actually an insecticide (Lindane), not a herbicide.
Step 2: Conclusion.
Bromosil is the correct example of a herbicide that utilizes translocation to be effective. Hence, the correct answer is (A).
Final Answer: \[ \boxed{(A) \, \text{Bromosil}} \]