deutsch | englisch  
Hark Orchideen - Competence in Orchids  
Information on crop protectionLegal information
Your position: Information on crop protection > Overview > Rhizoctonia > Biology  « backprint
Biology Damage Control Pictures
Rhizoctonia root and crown rot
The causative organism of root and crown rot on Phalaenopsis, Miltonia, Oncidium and other orchid varieties is the fungus Rhizoctonia solani Kühn. Rhizoctonia does not form any spores, but only dense mycelium settling on organic material. When the plants are more infested, there will be curling, usually at the roots. The fungus is widely spread and often gets into orchid cultivations in substrates. Wet, cold and badly ventilated substrates help the organisms to spread. In substrate, Rhizoctonia may form persistent sclerotial diseases which may be infectious for a very long time.
  Hark-Orchideen - Competence in Orchids