Non-Selective herbicides are?

Non-Selective herbicides are?

• A. A herbicide that moves through the vascular system to all plant parts.
• B. A substance that kills all plants it contacts. Mainly used in non-crop areas.
• C. A herbicide that targets only one species.
• D. A herbicide that kills only grasses.

Answer: (B)

Non-selective herbicides are broad-spectrum killers: they affect a wide range of plant species rather than targeting just a specific weed. Because of that broad action, they’re used in places where any vegetation is undesirable, such as along rights‑of‑way, around buildings, and in non-crop areas. Some non-selectives work by killing on contact, others are systemic, but the unifying idea is that they do not discriminate among plant species. The other options describe systems of action or selective targets (one species or grasses only), which is why they don’t fit as well.

Non-selective herbicides are broad-spectrum killers: they affect a wide range of plant species rather than targeting just a specific weed. Because of that broad action, they’re used in places where any vegetation is undesirable, such as along rights‑of‑way, around buildings, and in non-crop areas. Some non-selectives work by killing on contact, others are systemic, but the unifying idea is that they do not discriminate among plant species. The other options describe systems of action or selective targets (one species or grasses only), which is why they don’t fit as well.