They puncture nuts before shell hardening and after shell hardening. If feeding is early the nuts drop. If the feeding is late then black spots or pits develop in the kernel. This damage is referred to as kernel spot or bitter pit. The southern green stink bug is large, green, shield-shaped and about 0.5 inch long.
Adults have wings and nymphs are wingless.
The leaf-footed bug has a narrow body and long leaf shaped hind legs. Both species overwinter as adults in debris. They emerge in the spring and lay eggs in grasses or soybeans. They move to pecans only as adults. There are four or five generations a year.