Georgia Pesticide Applicators Practice Exam

Which of the following cultural practices can increase the risk of disease on turfgrasses?

1. Planting a resistant variety

2. Soil aeration

3. Watering at night

4. Applying fertilizers

The correct answer is: Watering at night

Watering at night is known to increase the risk of disease on turfgrasses because it creates prolonged periods of leaf wetness. Turfgrasses that remain wet overnight are more susceptible to various fungal diseases, as many pathogens thrive in moist environments. This environment can lead to conditions favorable for disease development, such as reduced evaporation and cooler nighttime temperatures that hinder drying. In contrast, practices such as planting resistant varieties, soil aeration, and applying fertilizers typically contribute to turf health and resilience. Resistant varieties can help minimize disease outbreaks, soil aeration improves drainage and root health, and proper fertilization can enhance the overall vigor of the grass, making it more competitive against pathogens. Each of these cultural practices promotes a healthier turf environment, reducing the likelihood of disease.