What is a common sign of beneficial insects in a turf ecosystem?

• A. Rapid leaf curling
• B. Wilting
• C. Discoloration of roots
• D. Predation signs, such as aphid mummification or observation of lady beetles

Answer: (D)

Recognizing signs of beneficial insects in a turf ecosystem centers on evidence of natural pest control in action. Beneficial insects such as lady beetles and parasitic wasps help suppress pests, and a telltale sign is predation activity: aphid mummies indicate a parasitoid wasp has attacked aphids, and seeing lady beetles actively feeding or hunting signals that predators are present. These signs show biological control is occurring, reducing pest damage without chemical inputs. By contrast, rapid leaf curling, wilting, or root discoloration point to plant stress from drought, disease, or insect feeding damage, not to beneficial insect activity.