Oblong pupa at top, mostly black with a few light shadings that suggest segments. Image below is stalk dissected to show indistinct, tiny pupa inside.

Figure 19D–E. Stalk borer pupae, side view (D) and inside lower stalk (E).

Oblong pupa at top, mostly black with a few light shadings that suggest segments. Image below is stalk dissected to show indistinct, tiny pupa inside.

Illustration by USDA.