Postemergence herbicides are described as what?

• A. Control most plants after they emerge and can damage plants when spray contacts green bark
• B. Only control grasses
• C. Only target perennials
• D. Work only when soil is dry

Answer: (A)

Postemergence herbicides are applied after weeds have already emerged and are actively growing. At this stage, the chemical targets the living, growing tissues of the plants, so it can kill or suppress the weeds that are present. A key practical point is that spray can injure any plant it contacts, including desirable plants, especially if it hits green foliage or young bark. That’s why careful application and drift control are essential. These products aren’t limited to grasses or to perennials, and their effectiveness isn’t dependent on soil being dry; they work by being taken up by the green tissues of the emerged weeds.