Summary of the Express Pest Risk Analysis for Candidatus Liberibacter solanacearum
‘Ca. Liberibacter solanacearum‘ may couses serious losses in Solanaceae cultivations, especially tomatoe, potatoe, pepper. The highest risk is associated with potatoe crops in PRA area.
Pest vector- Bactericera cockerelli is on A1 list EPPO and was not reoported in Europe.
therefore the likelihood of pathogen occurence in PRA area is low. In the future, agrophage occurence in PRA area will depend on vector presence (B. cockerelli). The likelihood of vectors occurence in field crops is low because of weather conditions (severe winters may eliminated vetor) B. cockerelli may not pass through the winter season in east part of Poland, but there is a risk that some part of population may migarte at the end of vegetation period. Overwintering of vector is possibile in greenhouses in which insecticides are not used.
Considering ‘Ca. Liberibacter solanacearum‘ and Trioza apicalis occurence in cultivation of carrtots in 2014 in Lower Saxony (Germany) (Munyaneza et al., 2015), there is a risk of bacteria appearance in carrots crops in PRA area. Trioza apicalis occurs in Poland (Luczak i in., 2012).
The treatment combining an intercrop (especially vetch) between beds and a sawdust mulch in the beds reduce the vector occurence (Aas 2000; Brandsæter et. al., 1999).
Insect netting and insecticide application are also efficient phytosanitary measures.
Biological pest control is used in some countries. (Avery et al., 2009)
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