Table 1.

Species of aphids (family Aphididae) collected for this study

Subfamily	Tribe	Genus	Species	Code*	Location and date
Aphidinae	Macrosiphini	Acyrthosiphum	A. pisum	APS	Lyon, France, September 1998†
		Macrosiphum	M. rosae	MRO	Godella, Spain, April 2001
Pemphiginae	Fordini	Baizongia	B. pistaciae	BPI	Tuéjar, Spain, September 1999
	Eriosomatini	Tetraneura	T. caerulescens	TCA	Bugarra, Spain, April 2000
Thelaxinae		Thelaxes	Th. suberi	THS	Teruel, Spain, June 2001
Chaitophorinae	Chaitophorini	Chaitophorus	Ch. populeti	CHP	Benifaió, Spain, April 2000
Lachninae	Cinarini	Cinara	C. (cinara) cedri	CCE	Llíria, Spain, May 2001
			C. (cupressobium) cupressi	CCU	Godella, Spain, November 2000
			C. (cupressobium) tujafilina	CTU	Almussafes, Spain, April 2001†

^*Abbreviation used to identify the Buchnera from the different aphids. 

^† Aphid populations that are been maintained in the laboratory.