What can worsen turfgrass health in relation to nematodes?

Maintaining poor soil health is crucial because it directly impacts the overall vitality of turfgrass, making it more susceptible to stressors, including pests like nematodes. Healthy soil provides essential nutrients, adequate drainage, and a balanced pH, all of which contribute to strong, resilient turf. When soil health deteriorates, it can lead to a range of problems such as poor root development, reduced nutrient uptake, and increased vulnerability to pathogens and pests. Nematodes thrive in compromised environments, and when the turfgrass is weakened due to poor soil conditions, it becomes an easier target for nematode infestation, ultimately leading to diminished turfgrass health.

Other options like over-fertilization, excessive watering, and planting diverse species can also affect turfgrass health, but not in the same direct manner as poor soil health. Over-fertilization can lead to nutrient imbalances and potential toxicity, excessive watering can promote root rot and disease, and planting diverse species generally enhances the resilience of a lawn against pests rather than worsening it. Therefore, focusing on soil health is the foundational aspect of maintaining strong, healthy turf that can withstand nematode pressures.