PICTORIAL KEY OF CENTRAL EUROPEAN CACOPSYLLA SPECIES ASSOCIATED WITH ROSACEAE
Major phytoplasma diseases in pome and stone fruits are transmitted in Europe by psyllids. Cacopsylla picta and Cacopsylla melanoneura were identified as vectors of apple proliferation, as vectors of pear decline Cacopsylla pyri, Cacopsylla pyricola and Cacopsylla pyrisuga come into question. The European stone fruit yellows is transmitted by Cacopsylla pruni. The precise identification of these species is required for a risk assessment of the spread of the diseases and for the launching of specific control measures. The determination of important species - e.g. Cacopsylla picta - is so far however only by special determination literature in English language possible. This problem will be solved by the new electronic identification key for psyllids on Rosaceae in Central Europe. It is aimed at plant protection advisors and interested laymen.
The electronic identification key was developed in collaboration with the Swiss psyllid specialist Dr. Daniel Burckhardt. It allows in a novel, on detail photos based concept the safe determination of psyllid species that transmit a phytoplasma in an exclusion process based on specific features. Other psyllids found in pome and stone fruit orchards can be excluded at the level of families and genera. Other species of the genus Cacopsylla, which are also found in orchards, can be determined up to the species. Fact sheets provide further information on all important Cacopsylla species. In addition, the website provides general information on the morphology of psyllids and contains a list of relevant literature.