The ladybug (or lady beetle), Hippodamia convergens, is perhaps the most famous of all beneficial insects for biological pest control. These insects are are small, slow-moving insects that are often found in gardens.
They feed on aphids, about 40-50 aphids per day, but will also eat a wide variety of other insects and larva including scales, mealybugs, leafhoppers, spider mites and other soft bodied insects and their eggs. Ladybugs are most effective if released before pest populations are large. Apply them early and allow them time to reduce your pest problem.
Females will lay eggs on plants which will hatch into larvae, which feed on pest insects just as voraciously as the adults. The larvae will feed on insects for about two weeks before they pupate into adults. Adult ladybugs can live for up to two years.