Contact Us

UIdaho PCN

Dr. Louise-Marie Dandurand
Project Director

Phone: (208) 885-6080
Fax: (208) 885-7760
Email: lmd@uidaho.edu

Mailing Address:
Pale Cyst Nematode Project
University of Idaho
875 Perimeter Drive MS 2339
Moscow, ID 83844-2339

pale cyst nematode

Biological Control of PCN

Principal Investigators: Louise-Marie Dandurand, Guy Knudsen


Trichoderma expressing green fluorescent protein
Trichoderma expressing green fluorescent protein
(Yeoung-Seuk Bae photo)


Plectosphaerella expressing red fluorescent protein
Plectosphaerella expressing red fluorescent protein
(Tim Johnson photo)

Several beneficial fungi have been identified as potential biological control (biocontrol) agents against PCN. These include Plectosphaerella (a known nematode-attacking fungus which we isolated from field cysts) and Trichoderma harzianum (which produces the enzyme chitinase that degrades chitin, an important structural component of PCN cysts). Our research includes isolation, characterization, and testing of these control agents in the laboratory, greenhouse, and field. Using techniques of molecular biology, we have also transormed these fungi with fluorescent marker genes to help evaluate their mode of action and efficacy in the laboratory and greenhouse.

In field trials in the summer of 2012, we formulated our (wild-type) Trichoderma isolate and applied it to soil in a PCN-infested potato field, which was then planted to barley. After several weeks, the biocontrol agent was consistently recovered from the barley rhizosphere, indicating successful field establishment. We are currently evaluating the biocontrol agent’s effect on PCN cysts in that field.
clark field