title: Biological activity of Pythium oligandrum against Phytophthora species.
abstract: Influence of Pythium oligandrum as an a.i. of Polyversum on population dynamic of Phytophthora cryptogea in peat and development of Phytophtora rot on gerbera, Lawson cypress and yew-tree were evaluated. Drenching of peat, artificially infested with P. cryptogea, with Polyversum immediatelly after gerbera planting resulted in significant decrease of colony forming units number within 4 weeks. Concentrations of the biopreparate used had no significant influence on its greater, biological activity. Drenching of plants with Polyversum at conc. 0.05 or 0.1%, after planting into peat infested with P. cryptogea or P. cinnamomi, resulted in the strong suppression of Phytophthora foot or root and stem rot of gerbera, cypress and yew-tree.
authors.affiliation: Research Institute of Pomology & Floriculture, Pomologiczna 18, 96-100 Skierniewice, Poland.
authors.forename: L B
authors.initials: LB
authors.lastname: Orlikowski
mesh_terms: D000898:Antibiosis; D019659:Asteraceae / Q000382:microbiology*; D015169:Colony Count, Microbial; D029781:Cupressus / Q000382:microbiology; D010572:Pest Control, Biological; D010838:Phytophthora / Q000254:growth & development*; D011157:Population Dynamics; D011775:Pythium / Q000502:physiology*; D012987:Soil; D020946:Taxus / Q000382:microbiology; D064028:Tracheophyta / Q000382:microbiology*; D014197:Trees / Q000382:microbiology
chemical_list: D012987:Soil