How does excessive thatch affect turf health?

Excessive thatch can significantly impact turf health by creating an environment that promotes the proliferation of pests and diseases. Thatch is a layer of organic matter, mainly composed of dead grass stems, roots, and other plant debris, that accumulates on the surface of the soil. When this layer becomes too thick, it can lead to several issues for the turf.

A thick thatch layer can harbor pests such as grubs and other insects that thrive in a sheltered environment. These pests not only damage the grass directly but can also create entry points for pathogens, leading to diseases that further weaken the turf. Additionally, a thick thatch layer can impede water infiltration and nutrient movement into the soil, which contributes to unhealthy turf conditions.

The other options do not accurately reflect the negative impact of excessive thatch. For example, it does not promote lush growth nor does it effectively protect against drought; in fact, it can hinder overall turf health. Furthermore, a dense thatch layer can actually reduce nutrient absorption rather than enhancing it, as nutrients may become trapped in the thatch and unavailable to the grass roots. Therefore, understanding the role of thatch in turf health is crucial for effective pest control and turf management practices.