ORIGINAL ARTICLE
Occurrence of Phytophthora ramorum and other Phytophthora species in nurseries, trade stands, forests and water
 
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1
Research Institute of Pomology and Floriculture Pomologiczna 18, 96-100 Skierniewice
 
2
Forest Research Institute, Sękocin Stary 3, 05-090 Raszyn
 
 
Corresponding author
Leszek B. Orlikowski
Research Institute of Pomology and Floriculture Pomologiczna 18, 96-100 Skierniewice
 
 
Journal of Plant Protection Research 2007;47(4):445-455
 
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ABSTRACT
Research over a three year period indicated that P. ramorum occurred rarely in Poland on Rhododendron spp., in spite of established monitoring in nurseries, trade stands, forest and water from early spring to late autumn each year. The pathogen was not found in forests on Vaccinium vitisidaea, Calluna vulgaris, Fagus sylvatica and Quercus rubra, proving its limited spread. The species was detected, however, from 2 rivers. P. citricola was isolated from most of surveyed plants. Besides this P. cactorum, P. cinnamomi, P.citrophthora and P. nicotianae var. nicotianae were isolated from diseased plants. Additionally Pestalotia sydowiana, species of Fusarium, Botrytis cinerea and Trichoderma were often found in diseased plant tissues. Laboratory and glasshouse research showed slight differences in colonization of plants by P. ramorum and P. citricola. However, taking into account the range of host plants, and frequency of pathogen occurrence in infected plant material and water, it became clear that P. citricola poses a much greater danger than P. ramorum to the natural environment in Poland.
CONFLICT OF INTEREST
The authors have declared that no conflict of interests exist.
 
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