I believe one of the best insects used for biological control of aphids would be the ever popular ladybug. Ladybugs are also referred to as lady beetles or ladybirds. Ladybugs will forage with gusto on an aphid diet. Other insects that will whet a ladybugs appetite are mealybugs, spider mites, thrips, and whiteflies.

Ladybugs can be purchased in small or large quantities. They will need enough food and water to keep them around long enough for them to lay eggs and begin another generation. Try to offer them a hibernation site on your property if you want them to winter over in your garden. Stack some dead leaves, hay or straw, at the base of a fence to allow them to have a place to hibernate over the winter.