Question

Which of the following chemical/s cannot be used as a weedicide?

• A. Dalapon
• B. Metachlor
• C. 2-4- Dichlorophenoxy-acetic acid.
• D. Colchicine

Answer 1

Answer: (D)

Colchicine

A.Dalapon - used as a weedicide

B.Metachlor - used as a weedicide

C.2-4-Dichlorophenoxy acetic acid - used as a weedicide and hormone.

D.Colchicine - used as a mutagen . It is a mitotic poison, it inhibits spindle formation that results in polyploidy of a cell. This can be detrimental for the major crop. So it isn't used as a weedicide.

So, the correct option is 'Colchicine'.