Preemergent herbicides are designed to be applied to which part of the weed?

Preemergent herbicides function primarily by targeting the seeds in the soil before they have a chance to germinate. When applied correctly to the soil surface, these herbicides create a barrier that inhibits the growth of weed seeds as they attempt to sprout. This preventive measure is highly effective in managing the emergence of annual weeds, such as crabgrass and other similar species.

The correct method of application for preemergent herbicides is to ensure they are on the soil surface before the targeted weeds begin their germination process. This proactive technique is essential in lawn and turf management to maintain healthy, weed-free environments. It's important to remember that applications made to foliage of already emerged weeds or directly at the roots of dormant weeds would not be effective, as the preemergent herbicides are specifically designed to interrupt the germination of seeds rather than control existing plants.