Ornamental and Turf Pesticide Applicators Practice Exam

What is a primary characteristic of Chinch Bugs that indicates damage to turf?

1. They cause circular patches of yellowing turf

2. They leave behind a sticky residue

3. They create large holes in the turf

4. They feed solely on organic matter

The correct answer is: They cause circular patches of yellowing turf

Chinch bugs are well-known pests in turf management, particularly affecting grass species like Kentucky bluegrass and fescue. When they infest a lawn, they typically cause damage in the form of circular patches of yellowing turf. This yellowing occurs because chinch bugs feed on the grass by inserting their specialized mouthparts into the plant tissues and extracting sap. The removal of sap weakens the grass, leading to a breakdown of the chlorophyll in the affected areas and resulting in the characteristic yellowing and browning. The formation of irregular patches may lead to confusion, but the pattern of circular patches is a distinct sign of chinch bug activity. This characteristic allows turf managers and homeowners to quickly identify a chinch bug infestation and respond appropriately, typically by applying appropriate control measures before the damage spreads further. Their feeding not only impacts the aesthetics of the lawn but can also lead to the death of patches if left untreated. In contrast, the other options describe characteristics that are either not associated with chinch bugs or suggest alternative types of damage that do not align with their behavior or feeding patterns.