Biological activity of Pythium oligandrum against Phytophthora species
Orlikowski, L.B.
Mededelingen 66(2a): 161-166
2001
ISSN/ISBN: 1373-7503 PMID: 12425033 Document Number: 537121
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.