Aphid is one of the most common and troublesome garden pests. It damages plants especially the new growth by sucking the essential sap of the plant. Aphids also develop a sticky honeydew that encourages the growth of mold and virus. An easy and natural method for controlling aphids in the garden is planting Tagetes as companion plant. The smell of Tagetes attracts hoverfly that feeds on aphids. Hoverfly also lays eggs on aphids that become food of larva that hatches out of the eggs.