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    Author(s): S. Wagner; K. Kaminski; S. Werres
    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. 481-482
    Publication Series: General Technical Report (GTR)
    Station: Pacific Southwest Research Station
    PDF: View PDF  (160 KB)

    Description

    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.

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    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

    Keywords

    Phytophthora ramorum, fungicides, mycelial growth, zoospore germination, in vitro tests

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