Ornamental and Turf Pesticide Applicators Practice Exam

What is a common sign of cutworm damage on a lawn?

1. Yellow streaks in the grass

2. Bare patches in specific areas

3. Brown streaks or circles

4. Increased grass height

The correct answer is: Brown streaks or circles

The identification of cutworm damage typically showcases specific patterns in lawn health. A characteristic sign of cutworm activity is the presence of brown streaks or circles within the grass. This occurs as cutworms, which are the larvae of certain moths, feed on the grass blades, often cutting them down near the soil line. This feeding behavior leads to the formation of irregular, brown patches where the grass has been severed, giving the appearance of dead or dying areas. Unlike other signs present with different lawn issues, the brown streaks or circles are distinctly associated with the destruction caused by cutworms. Other options like yellow streaks or bare patches in specific areas can be attributed to various factors such as nutrient deficiencies or diseases, rather than the specific feeding pattern of cutworms. Increased grass height generally indicates healthy growth and is not related to damage caused by these pests. Thus, recognizing brown streaks or circles is critical for diagnosing cutworm damage accurately.