Does ladybird destroy crops?

Answer 1

Ladybirds in there adult state and the grubs both eat aphids. Aphids are a pest that can destroy crops by sucking out the sap.
So the answer is no, and the opposite is true, that ladybirds are beneficial to crops as they eat insects that can destroy crops and plants.

Answer 2

Most kinds of ladybirds, also called ladybugs or
lady beetles, are beneficial to crops because they
eat aphids. However, a few species, such as the
Mexican bean beetle, are herbivores and do
damage the plants they feed on.

Answer 3

Coccinellidae is a family of beetles, known variously as ladybirds (Commonwealth English), ladybugs (North American English) or lady beetles (preferred by scientists). The word "lady" in the name is thought to allude to the Blessed Virgin Mary in the Catholic faith. Coccinellids are found worldwide, with over 4,500 species described, more than 450 native to North America alone. Coccinellids are small insects, ranging from 1 mm to 10 mm (0.04 to 0.4 inches), and are usually yellow, orange, or red with small black spots on their carapace, with black legs, head and feelers. As the family name suggests, they are usually quite round in shape. Because they are useful, colourful, and harmless to humans, coccinellids are typically considered cute even by people who hate most insects. Some people consider seeing them or having them land on one's body to be a sign of good luck to come, and that killing them presages bad luck.

Coccinellids are beneficial to organic gardeners because most species are insectivores, consuming aphids, fruit flies, thrips, and other tiny plant-sucking insects that damage crops. In fact, their name is derived from "Beetle of Our Lady", recognising their role in saving crops from destruction. Today, they are commercially available from a variety of suppliers.
http://en.wikipedia.org/wiki/Ladybird

Many crops benefit from lady beetles. They are helpful for growers of vegetables, grain crops, legumes, strawberries, and tree crops; however any crop that is attacked by aphids will benefit from these beetles.
http://www.nysaes.cornell.edu/ent/biocontrol/predators/ladybintro.html

Answer 4

isn't ladybird the dog off king of the hill?