2,4-D is an example of which type of herbicide?

2,4-D is an example of which type of herbicide?

• A. Selective postemergence herbicide
• B. Nonselective postemergence herbicide
• C. Selective preemergence herbicide
• D. Growth regulator herbicide

Answer: (A)

Selective postemergence weed control is what this item is testing. 2,4-D is used in turf to target broadleaf weeds like dandelions, clover, and plantains, while most grasses tolerate the typical labeled rates. That makes it selective: it distinguishes between the weeds you want to kill and the turf you want to keep. It’s applied after the weeds have emerged and are actively growing, which is what postemergence means. If you were looking to prevent weeds from germinating, you’d use a preemergence product; 2,4-D isn’t used in that way. Because it would generally harm the turf if used indiscriminately, it’s not considered nonselective. In practical terms, you’d apply 2,4-D to a lawn to knock out broadleaf weeds without destroying the grass, which fits the description of a selective postemergence herbicide.

Selective postemergence weed control is what this item is testing. 2,4-D is used in turf to target broadleaf weeds like dandelions, clover, and plantains, while most grasses tolerate the typical labeled rates. That makes it selective: it distinguishes between the weeds you want to kill and the turf you want to keep. It’s applied after the weeds have emerged and are actively growing, which is what postemergence means. If you were looking to prevent weeds from germinating, you’d use a preemergence product; 2,4-D isn’t used in that way. Because it would generally harm the turf if used indiscriminately, it’s not considered nonselective. In practical terms, you’d apply 2,4-D to a lawn to knock out broadleaf weeds without destroying the grass, which fits the description of a selective postemergence herbicide.