Which of the following describes where whiteflies are most commonly found?

• A. Streaking and distortion of leaves
• B. On the underside of leaves
• C. Pear-shaped body
• D. Brown rot with fuzzy gray spores

Answer: (B)

Whiteflies concentrate on the underside of leaves because that sheltered microclimate provides a comfortable feeding site and protects them from bright light and desiccation. When scouting, flip leaves over and inspect the lower surface for small white insects or waxy residues, which is a common sign of an infestation. The other descriptions relate to damage symptoms, a body shape, or a fungal disease, none of which indicate where whiteflies typically reside.