First notice of Phytophthora crown and root rot of Euphorbia pulcherrima in Polish greenhouses
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Research Institute of Horticulture, Konstytucji 3 Maja Street 1/3, 96-100 Skierniewice, Poland
Submission date: 2013-02-26
Acceptance date: 2013-09-26
Journal of Plant Protection Research 2013;53(4):307–311
The plant pathogen, Phytophthora cryptogea, was recovered from 4/5 of the 75 poinsettias collected from two greenhouse farms. The poinsettias showed stunting and wilting as well as stem base and root rot symptoms. Representative isolates of the species from two poinsettia cultivars, colonized stem parts, leaf petioles, leaf blades and root parts. Stem parts of 6 cultivars were colonized at a slower rate than other poinsettia organs. Isolate from Euphorbia pulcherrima also colonized stem parts and leaf blades of E. amygdaloides, E. cyparissias, and E. polychroma. Isolates of P. cryptogea from the other 6 plant hosts, colonized the overground parts of poinsettia cv. Allegro. This is the first report describing symptoms and colonization of poinsettia cultivars by P. cryptogea in Poland.
The authors have declared that no conflict of interests exist.
Leszek B. Orlikowski
Research Institute of Horticulture, Konstytucji 3 Maja Street 1/3, 96-100 Skierniewice, Poland
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