What should not be done when applying pre emergence herbicides to weak or damaged turf?

Using pre-emergence herbicides without caution can be detrimental to already weak or damaged turf. Pre-emergence herbicides are designed to prevent weed seeds from germinating, but they can also stress existing grass, especially if the turf is not healthy. When applying these chemicals, it is crucial to assess the health of the turf and choose the appropriate timing and application method.

Applying these herbicides without proper consideration could exacerbate existing issues in the turf, potentially leading to further damage or die-off. For instance, if the turf is already under stress due to drought, disease, or heavy foot traffic, the additional stress from herbicides could hinder recovery. This makes it essential to approach their use with care, especially in sensitive conditions.

Choosing to apply the herbicides at the recommended rate, mixing them with a wetting agent to enhance their effectiveness, or even avoiding their use when turf is particularly vulnerable can be prudent steps.