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Abstract
As part of the project European
Phytophthora ramorum Pest Risk Analysis (RAPRA) a wide range of fungicides was tested for
in vitro activity against mycelial growth and zoospore germination of
P. ramorum. A preliminary set of experiments was performed to study the effect of nine common fungicides specific for
Phytophthora spp. Dimethomorph, copperoctanoate, and the combination of mancozeb and fenamidone inhibited mycelium growth and zoospore germination of
P. ramorum isolates in vitro. Mancozeb alone did not inhibit mycelial growth effectively. Propineb, azoxystrobin, propamacarb, and cyazofamid did not effect mycelial growth and zoospore germination. Five resistant isolates towards metalaxyl?M in the European population were detected. Further testing
in planta is required before the actual efficacy of each treatment can be evaluated.
Parent Publication
Citation
Wagner, S.; Kaminski, K.; Werres, S. 2008. Evaluation of fungicides for control 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. 481-482
