Phytophthora spp. In Polish ornamental nurseries. I. Perennial plants, new hosts of P. cryptogea
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Research Institute of Pomology and Floriculture
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Leszek B. Orlikowski
Research Institute of Pomology and Floriculture Pomologiczna 18, 96-100 Skierniewice, Poland
Journal of Plant Protection Research 2007;47(4):401-408
Phytophthora cryptogea was isolated from diseased stem base of Aquilegia discolor and rotted leaves of Saxifraga and Sempervivum spp. Additionally, Fusarium species and Botrytis cinerea were frequently isolated from diseased parts of plants. Most of Sempervivum species and cultivars except S. soculiferum were colonized in laboratory conditions by P. cryptogea. The isolates from Alstroemeria aurantiaca, Gerbera jamesonii, Saxifraga arendsii, S. paniculata, Sempervivum arachnoideum colonised houseleek leaves with the fastest spread of necrosis on plant parts inoculated with cultures from Gerbera and S. arendsii. The isolate from S. arendsii colonized 5 species and cultivars of saxifrage as well as Iberis sempervivum, Lavendula angustifolia, Sempervivum sobuliferum and Vinca minor with the slowest development on periwinkle. In laboratory trials isolate of P. cryptogea from houseleek grew on PDA and colonized leaves of that plant at temperature ranging from about 10 to 32.5°C with optimum at 20–30°C.
The authors have declared that no conflict of interests exist.
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