Canadian Forest Service Publications

In vitro testing of biological control agents on A1 and A2 isolates of Phytophthora ramorum. 2008. Elliott, M.; Shamoun, S.F. Pages 351-354 in S.J. Frankel, J.T. Kliejunas, and K.M. Palmieri, technical coordinators. Proceedings of the sudden oak death third science symposium, March 5-9, 2008, Santa Rosa, CA. US Forest Service, Pacific Southwest Research Station, Albany, CA, General Technical Report PSW-GTR-214.

Year: 2008

Issued by: Pacific Forestry Centre

Catalog ID: 28661

Language: English

Availability: PDF (download)

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Biological control products were tested in vitro with six isolates of Phytophthora ramorum. These isolates were geographically diverse and were selected based on their pathogenicity to detached Rhododendron leaves. In addition to five commercially available biocontrol products, nine species of Trichoderma were tested. The in vitro tests included dual culture methods and detached Rhododendron leaf assays. Best results were obtained with the actinomycete Streptomyces lydicus (Actinovate®) in both culture and detached leaf tests. There were differences among P. ramorum isolates in their sensitivity to the biocontrol agents tested.