Journal of Chemical Ecology (2008) 34, 1045-1049

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C. J. Mayer, A. Vilcinskas, J. Gross (2008)
Phytopathogen Lures Its Insect Vector by Altering Host Plant Odor
Journal of Chemical Ecology 34, 1045-1049
Abstract: Many phytopathogens that cause worldwide

losses of agricultural yield are vectored by herbivorous insects. Limited information is available about the interactions among phytopathogens, host plants, and insect vectors. In this paper, we report that the cell wall-lacking bacterium "Candidatus" Phytoplasma mali can alter both the odor of its host plant (apple) and behavior of its vector, the univoltine psyllid "Cacopsylla picta". Apple trees infected by this phytoplasma emitted higher amounts of β-caryophyllene when compared to uninfected ones. Psyllids that had no previous contact with Ca. P. mali, as well as infected pyllids, are more attracted by volatiles emitted from phytoplasma-infected apple plants than from uninfected ones. Psyllids that had developed on infected plants without getting infected showed the opposite behavior. These results suggest that the pathogen modifies host plant odor that lures its vector to infected plants. This may result in higher numbers of transmitting vector insects within the population.
(The abstract has been supplied by the author or ISPI and is excluded from the Creative Commons licence.)
Database assignments for author(s): Jürgen Gross

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution
pheromones/attractants/traps

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Cacopsylla picta	Apple (Malus)	Germany
	Candidatus Phytoplasma mali	Apple (Malus)	Germany