In commercial and everyday use, the term weight is usually used to mean mass, and the verb to weigh means to determine the mass of or to have a mass of. Used in this sense, the proper SI unit is the kilogram (kg).
For other uses, see Aphid (disambiguation). Aphids, also known as plant lice and in Britain and the Commonwealth as greenflies, blackflies, or whiteflies (not to be confused with jumping plant lice or true whiteflies), are small sap-sucking insects, and members of the superfamily Aphidoidea.
Ants are attracted to aphids due to the fact that aphids give off a sweet secretion. The ants will collect these aphid secretions, and take them back to their nests. The ants will also protect the aphids from predators. If you do find ants in your garden, check to make sure that aphids are not present as well.