Gesunde Pflanzen (2007) 59, 183-192

Barbara Jarausch, Isabel Mühlenz, Annette Fuchs, Isabelle Lampe, Uwe Harzer and Wolfgang Jarausch (2007)
Untersuchungen zur Europäischen Steinobstvergilbung (ESFY) in Deutschland
[Research on European stone fruit yellows (ESFY) in Germany]
Gesunde Pflanzen 59 (4), 183-192
Abstract: From 2003 to 2007 surveys have been conducted in different stone fruit growing regions in southwest Germany to detect European stone fruit yellows (ESFY) disease in Germany. Samplings have been done regularly in selected reference orchards in the regions Neuwieder Becken, Rheinhessen, Vorderpfalz and Südpfalz in summer on trees showing ESFY typical symptoms as well as on branches of trees with unspecific symptoms. All samples have been analysed by PCR for infection with Candidatus Phytoplasma prunorum. The phytoplasma could be detected in all investigated regions on the cultivated Prunus species P. armeniaca, P. persica and P. domestica. No infection was found in wild Prunus species. The main spread of the disease appeared on apricot while peach and European plum were less affected. A good correlation between symptoms and molecular detection of the pathogen could be shown for the typical symptoms in summer and winter for apricot as well as for peach.
During regular psyllid captures in the reference orchards the population dynamics of Cacopsylla pruni could be described in southwest Germany for several years. By PCR-testing all collected insects individually a yearly natural infection rate of about 1-2% of all individuals of C. pruni could be calculated.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: German)
Link to article at publishers website
Database assignments for author(s): Barbara Jarausch

Research topic(s) for pests/diseases/weeds:
surveys/sampling/distribution
transmission/dispersal of plant diseases

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Phytoplasma prunorum	Apricot (Prunus armeniaca)	Germany
	Phytoplasma prunorum	Peach/nectarine (Prunus persica)	Germany
	Phytoplasma prunorum	Plum/prune (Prunus domestica)	Germany
	Cacopsylla pruni		Germany