Ornamental and Turf Pesticide Applicators Practice Exam

Which statement regarding fertilizing infected turf is false?

1. Do not fertilize turf that is infected with Dollar spot

2. Fertilizing can help recover turf

3. Fertilizing can attract pests

4. Fertilizing is necessary for all healthy grass

The correct answer is: Do not fertilize turf that is infected with Dollar spot

Fertilizing infected turf, particularly with diseases like Dollar spot, requires careful consideration. The statement that it is advisable not to fertilize turf that is infected with Dollar spot is inaccurate. In fact, fertilizing can actually be beneficial in some cases, as it may help the grass recover from stress and promote healthier growth, assuming the right type and amount is used. When turf is infected, it is often in a weakened state. Applying fertilizer, particularly one high in nitrogen, can provide the nutrients needed to revitalize the grass, encouraging growth that can outcompete the disease. However, inappropriate fertilization practices can exacerbate the problem by promoting rapid growth that the grass may not sustain, thus attracting and encouraging the activity of certain pests that thrive on lush, vulnerable grass. Additionally, while fertilization may not be universally necessary for all healthy grass, it plays an essential role in turf health management when the grass shows signs of distress, such as disease. Thus, it is crucial for management practices to balance the needs of the turf with the conditions present, especially in the case of existing diseases.