The common weedicide used in cultivating fields is:

Concept: Weedicides can be characterized as pesticides utilized to slaughter weeds. 2,4-D (2,4-di chloro phenoxy acetic corrosive) could be a herbicide created in the 1940s and is still being utilized nowadays.

2,4-D is an herbicide used as a household weed-killer, agricultural herbicide, and aquatic herbicide. It is absorbed by the leaves and transferred to the plant's meristems. The uncontrolled, unsustainable growth ensues, causing stem curl-over, leaf withering, and eventual plant death.

Hence, the correct answer is option A.