Ornamental and Turf Pesticide Applicators Practice Exam

Which pests are known for feeding on the roots of turf grasses?

1. Cutworms and armyworms

2. White grubs and mole crickets

3. Japanese beetles and masked chafers

4. Grubs and beetles

The correct answer is: White grubs and mole crickets

The pests recognized for feeding on the roots of turf grasses include white grubs and mole crickets. White grubs, which are the larval stage of various beetles, primarily consume organic matter, including the roots of grasses, leading to significant turf damage. When grubs are present in high numbers, they can disrupt the integrity of the root system, causing the grass to wilt and die. Mole crickets are also known to cause root damage as they burrow through the soil and feed on grass roots. Their tunneling activity not only harms the roots directly but can also lead to soil compaction and hinder water absorption, further stressing the grass. Although cutworms and armyworms primarily feed above the ground on the foliage of plants, and while Japanese beetles and masked chafers may be associated with turf damage, they do not primarily feed on roots. The choice stating grubs and beetles lacks specificity and does not indicate any particular group of turf grass root feeders. Thus, identifying white grubs and mole crickets as direct root feeders is essential in understanding which pests pose the most threat to the health of turf grasses.