What is the key difference between white grub larvae and billbug larvae?

• A. Billbug larvae have legs, and white grubs have six
• B. Billbug larvae have no legs, and white grubs have six
• C. Billbug larvae have six legs, and white grubs have none
• D. Billbug larvae have no legs, and white grubs have no legs

Answer: (B)

A fundamental way to tell these larvae apart is by their legs. Billbug larvae are legless, while white grub larvae have six legs. That leg presence is a reliable field cue: billbug larvae look like small, legless maggots feeding on roots, whereas white grubs are the classic C-shaped beetle larvae with three pairs of legs near the front. This difference is why the correct choice states that billbug larvae have no legs and white grubs have six. The other options mix up which group has legs, which wouldn’t match the physical evidence you’d see when inspecting roots.