It is often bright red or yellow, with black, red, white, or yellow spots.
Ladybugs feed chiefly on aphids and scale insects.
Thus, fruit growers find ladybugs helpful. In the late 1800's, the cottony cushion scale, a scale insect pest, almost killed California's fruit crop, and ladybugs were brought in to control the pest and save the crop. Two kinds of ladybugs harm beans, melons, squashes, and other garden plants. But the work of the beneficial kinds of ladybugs far outweighs the damage done by the few harmful ones. Ladybug Scientific Classification.