What are symptoms of Nematodes in turf grass?

Yellowing and thinning of turf is a common symptom of nematode infestation in turf grass. Nematodes are microscopic roundworms that can cause significant damage to grass by feeding on the roots and other parts of the plant. When the roots are compromised, the plant's ability to absorb water and nutrients is reduced, leading to overall stress. The result is often visible in the form of yellowing leaves and patches of grass that thin out and may die off.

In contrast, colorful patches on grass blades might indicate other issues, such as fungal diseases or nutrient deficiencies, rather than nematode damage. A mild fragrance in the grass is generally not associated with nematode problems and doesn’t correlate with any signs of infestation or damage. Lastly, strong growth of grass would typically signify good health and adequate conditions rather than a nematode problem, as nematodes negatively affect growth by damaging the root system. Hence, the presence of yellowing and thinning is a direct and clear indicator of nematodes affecting turf grass.