ISHS Acta Horticulturae 386: XVI International Symposium on Fruit Tree Virus diseases
EPIDEMIOLOGICAL STUDIES ON APPLE PROLIFERATION DISEASE IN SOUTHERN GERMANY |
| Authors: | K. Bliefernicht, G. Krczal |
| Abstract:
The natural spread of apple proliferation disease has been monitored in different orchards in Rhineland-Palatinate for more than 3 years. During the investigation period the infection rates have increased up to more than 40% in some varieties. The reasons for the unexpected and rapid spread are not clear, but infections by roots growing together seem to play an important role. The occurrence of a putative vector of the apple proliferation disease, the leathopper Fieberiella fiorii (Stál) was also determined in several orchards and adjacent hedges. F. florii could be detected in most of the plantations, sometimes in high numbers. During summertime leaffhoppers were caught in orchards and deep-frozen for further investigations. In some of these insects MLOs could be detected by PCR. | |
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