Which symptom is indicative of nematode infestation in turf areas?

Premature wilting in turf areas, even when there is adequate moisture, is a significant indicator of nematode infestation. Nematodes, particularly plant-parasitic types, can damage the roots of grass, leading to restricted uptake of water and nutrients. This root damage prevents the grass plants from effectively utilizing moisture, causing signs of stress such as wilting.

In contrast, healthy root systems would display bright green and robust growth, while lush and thick foliage is generally not associated with a nematode problem; rather, it typically suggests a healthy plant environment. The absence of wilting in dry conditions would indicate that the grass is healthy and effectively managing water needs, which negates the signs of nematode infestation. Thus, the symptom of premature wilting, despite having adequate water, is distinctly representative of the negative impact nematodes have on turf health and vitality.