Three nymphs. Upper left, D, is small with slender body. Upper right, E, is oval. Bottom, F, is pear-shaped with cauda and cornicles visible and long back legs.

Figure 15D–F. Turnip aphid early nymph (D), older nymph with wing buds (E), and wingless adult female (F).

Three nymphs. Upper left, D, is small with slender body. Upper right, E, is oval. Bottom, F, is pear-shaped with cauda and cornicles visible and long back legs.

Illustration by USDA.