Pacific Southwest

Title: In vitro testing of biological control agents on A1 and A2 isolates of Phytophthora ramorum

Author: Elliott, Marianne; Shamoun, Simon

Date: 2008

Source: In: Frankel, Susan J.; Kliejunas, John T.; Palmieri, Katharine M., tech. coords. 2008. Proceedings of the sudden oak death third science symposium. Gen. Tech. Rep. PSW-GTR-214. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. pp. 351-354

Station ID: GTR-PSW-214

Description: 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.

Keywords: Phytophthora ramorum, Trichoderma spp., Streptomyces, biological control

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Citation

Elliott, Marianne; Shamoun, Simon   2008.  In vitro testing of biological control agents on A1 and A2 isolates of Phytophthora ramorum.   In: Frankel, Susan J.; Kliejunas, John T.; Palmieri, Katharine M., tech. coords. 2008. Proceedings of the sudden oak death third science symposium. Gen. Tech. Rep. PSW-GTR-214. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. pp. 351-354.