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1

Colony made up of green to yellowish green apterous

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Colony made up of dark to black or dark apterous with light-coloured larvae  

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2

Apterous almond green, elongate, covered with a whitish waxy pruinosity, cornicles short and cauda digitate; alate without dorsal pigmentation, cornicles and cauda like apterous form; colonies develop on underside of leaves which are not deformed, even under the effect of densely populated colonies
Hyalopterus pruni

Apterous green or yellowish green  with cornicles medium-sized

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3

Apterous green, antennae darkened at segmental sutures, cornicles straight, narrowing towards tip and darkening from distal half, cauda digitate; alate  with a dorsal patch roughly square, cornicles straight, narrowing, and also darker, towards tips 
Myzus varians

Apterous green to yellowish, colony includes pinkish individuals which are the future alates  (nymphs), antennae gradually darkening towards the tip, cornicles straight (individuals born on primary host); alate with dorsal patch jagged and perforated
Myzus persicae

4

Apterous adult brownish, abdomen with broad stripes on segments, antennae dark except segment III, cornicles short and black, cauda broad and rounded; larva: abdomen light green showing dark spots evenly spread, cornicles short and black; alate with dorsal patch dark, antennae dark, cornicles short and black, cauda large and rounded
Brachycaudus schwartzi

Apterous with cornicles medium-sized, length more than two times longer than cauda

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5

Apterous black glossy, cornicles black, fine and cylindrical, cauda triangular and black; alate with dorsal patch covering whole abdomen  and possibly meeting the marginal sclerites, antennae dark with numerous rhinaria on III and IV, cornicles black, cauda broad and rounded 
Myzus cerasi

Apterous black with large dorsal patch, sclerotized, cornicles broader at base and black, cauda broad and rounded;  alate with dorsal patch covering whole abdomen  and possibly meeting the marginal sclerites, antennae dark with numerous rhinaria on III and IV, cornicles black, cauda broad and rounded
Brachycaudus persicae

1

Apterous with cornicles short

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Apterous with cornicles medium-sized

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2

Apterous almond green, elongate, covered with a whitish waxy pruinosity, cornicles short, cauda digitate; alate without dorsal pigmentation, cornicles and cauda as in apterous 
Hyalopterus pruni

Apterous green to yellowish, small, cornicles short, cauda short and rounded, a little longer than wide; alate with dorsal patch, antennae with 16-20 rhinaria on III and 3-4 on IV, cornicles and cauda as in apterous
Brachycaudus helichrysi

3

Apterous pale green or yellowish green, glossy with longitudinal dorsal stripe and dark green spots on segments, frontal tubercles pointed, cornicles pale, cylindrical and long (2 times longer than cauda), cauda triangular; alate shows dorsal patch with contour irregular showing two perforations, frontal tubercles pointed, cornicles moderately pigmented and cylindrical, cauda triangular, pointed
Phorodon humuli

Apterous green to yellowish, colony includes pinkish individuals que which are the future alates (nymphs), frontal tubercles convergent and rounded, antennae gradually darkening towards tip, cornicles medium-length, cauda linguate; alate with dorsal patch jagged and perforated, cornicles medium-sized, cylindrical to very slightly swollen on inner side and slightly pigmented, cauda digitate
Myzus persicae

1

Apterous crimson brown, covered with a thick woolly secretion of wax, cornicles reduced  to a pore, cauda indistinct; alate wing with medial vein once-branched, antennae very short and characterized by flattened rhinaria 

Eriosoma lanigerum

Apterous not covered with thick secretion 

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2

Apterous mauve-brown to purple, covered with dense a pruinosity, cornicles short, black and slightly conical, cauda short; alate with dorsal patch square, cornicles straight and black, cauda short; species dependent on pear
Dysaphis pyri

Apterous green to dark olive green olive or pink with pruinosity                               

——> 3

3

Apterous green, antennae dark at tip, cornicles light-coloured, short, straight and marked by a constriction, cauda short; alate with marginal sclerites well marked, antennae short and ending in a curved processus terminalis, cornicles short and clearly showing a constriction, cauda short
Rhopalosiphum insertum

Apterous green with cornicles black

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4

Apterous devoid of dorsal pigmentation, cornicles straight and black, cauda black, broad and digitate; alate with well-defined marginal sclerites, cornicles dark and straight, cauda dark
Aphis pomi 

Apterous dark olive green or pink with pruinosity, cornicles black, straight and slightly thinned at tip, cauda short and triangular; alate with dorsal patch compact, antennae with abundant rhinaria, prominent, cornicles black and straight, cauda short and triangular; species dependent on apple
Dysaphis plantaginea