milkweed aphids are always bright yellow or orange with black legs and black spikes, or “cornicles,” on their rears. Like other aphids, milkweed aphids typically feed in clusters on plant ...

Adult soybean aphids are small (less than 1/16" in length), yellow- bodied insects with distinct black cornicles or “tailpipes.” They can be either winged or wingless. “The soybean aphid is ...