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Their fecundity is high, they have a diversity of modes of reproduction, compex life cycles invovling alate (winged) and apterous (wingless) individuals that exploit host plants. These strategies make the aphids a formidable force threatening the world of plants grown for crops.

For each species, you will find a files showing:

• morphological characters; for some species also a detailed identification file.
• life cycle(s)
• host plants
• particular characteristics
• agronomic impact
• range of natural enemies

The illustrations bring to the fore the full panoply of colours and forms to be found, in a living world that operates at such a small scale.
Although often green, aphids can display a whole spctrum of colours.
Some species even produce clones of differing colours (green or pink clones in Acyrthosiphon pisum, green or orange in Sitobion avenae, Macrosiphum euphorbiae for example).

Cavariella aegopodii (light green)	Aphis nasturtii (yellow)	Neotoxoptera formosana (black)	Dysaphis pyri (purple)
	Uroleucon tanaceti (reddish brown)	Acyrthosiphon pisum (pink and green colony)

Listing of Genus