Which is more susceptible to herbicides?

• A. Seedlings
• B. Mature plants
• C. Both equally
• D. Neither

Answer: (A)

Susceptibility to herbicides is strongly influenced by the plant’s growth stage. Seedlings have actively dividing cells and new meristematic tissue, which are prime targets for many herbicides that disrupt growth and essential processes. They also have less developed protective barriers, such as a thinner cuticle and less mature epidermal defenses, making herbicides easier to absorb and move to active sites. In contrast, mature plants often possess tougher, more lignified tissues and a more developed detoxification capacity, so they can cope better with herbicide exposure. Because of these differences in growth activity, tissues, and defensive capabilities, seedlings are more easily affected, making them more susceptible to herbicides.