Most lady beetles in North America are beneficial as both adults and larvae, feeding primarily on aphids. They also feed on mites, small insects, and insect eggs. The two exceptions are the introduced Mexican bean beetle, Epilachna varivestis, and the squash beetle, Epilachna borealis. The adults and larvae of both species feed on plants. Appearance Lady beetles are usually red or orange with black markings.
Some lady beetles are black, often with red markings.
They have alligator-like larvae. Many crops benefit from lady beetles. Pests Attacked Most lady beetles found on crops and in gardens are aphid predators. Some species prefer only certain aphid species while others will attack many aphid species on a variety of crops. Some prefer mite or scale species.