Entomologia Experimentalis et Applicata (2004) 110, 11-21

M. Fiebig, H.-M. Poehling and C. Borgemeister (2004)
Barley yellow dwarf virus, wheat, and Sitobion avenae: a case of trilateral interactions
Entomologia Experimentalis et Applicata 110 (1), 11-21
Abstract: We analysed interactions in the system of two Barley Yellow Dwarf Virus (BYDV) strains (MAV and PAV), and wheat (cv. Tinos) as host plant for the virus, and the cereal aphid Sitobion avenae (F.) as vector, in particular whether or not infection by the virus might alter host plant suitability in favour of vector development. By measuring the amino acid and sugar content in the phloem sap of infected and non-infected wheat plants we found a significant reduction in the concentration of the total amount of amino acids on BYDV-infected plants. Qualitative and quantitative analysis of honeydew and honeydew excretion indicated a lower efficiency of phloem sap utilisation by S. avenae on infected plants. In addition, S. avenae excreted less honeydew on infected plants. Both BYDV strains significantly affected aphid development by a reduction in the intrinsic rate of natural increase. Hence, infection by the virus reduced the host suitability in terms of aphid population growth potential on BYDV-infected plants. However, more alate morphs developed on virus-infected plants. These findings are discussed in relation to the population dynamics of S. avenae, and, as a consequence, the spread of BYDV.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: English)
Link to article at publishers website
Database assignments for author(s): Hans-Michael Poehling, Christian Borgemeister

Research topic(s) for pests/diseases/weeds:
transmission/dispersal of plant diseases
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Luteovirus pavhordei	Wheat (Triticum)
	Luteovirus mavhordei	Wheat (Triticum)
	Sitobion avenae	Wheat (Triticum)