Bulletin of Entomological Research (1990) 80, 27-29

H.D. Loxdale and C.P. Brookes (1990)
Prevalence of Sitobion fragariae (Walker) over S. avenae (Fabricius) (Hemiptera: Aphididae) on wild cocksfoot grass (Dactylis glomerata) in south-east England
Bulletin of Entomological Research 80 (1), 27-29
Abstract: Individual cereal aphids of the species Sitobion avenae (Fabricius) and S. fragariae (Walker) were differentiated by their peptidase electrophoretic banding patterns; S. avenae has three diagnostic isoenzyme bands (PEP-3 to -5), whereas S. fragariae has one (PEP-1). Over 90% of 5389 individuals of these two species, collected from the grass Dactylis glomerata within 50 km of Rothamsted over the course of several years, were S. fragariae. The importance of D. glomerata and other non-cereal Gramineae species as alternative summer and overwintering hosts for S. avenae is discussed in relation to this finding.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Hugh D. Loxdale

Research topic(s) for pests/diseases/weeds:
environment - cropping system/rotation

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Sitobion avenae		United Kingdom
	Sitobion fragariae		United Kingdom
	Dactylis glomerata (weed)		United Kingdom