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Research article - Peer-reviewed, 2016

Dutch elm disease on the island of Gotland: monitoring disease vector and combat measures

Menkis, Audrius; Östbrant, Inga-Lena; Vasaitis, Rimvydas; Wågström, Karin

Abstract

The island of Gotland (Sweden) possesses the largest (more than one million trees) wild population of elms in northern Europe, which until recently was not affected by Dutch elm disease (DED). In 2005, DED was observed for the first time in the northeastern part of Gotland, and in the following years, it rapidly spread in all directions, generally following the major distribution of elms. Implementation of intensive control measures including ground surveys and geographic information system mapping of DED-diseased trees, their felling and destruction, and stump treatment with the herbicide glyphosate allowed reduction of the source of infection and probably suppression of an otherwise very rapid spread of the disease. Monitoring the flying periods of Scolytus multistriatus vector beetles between the years 2007 and 2011 showed that the abundance of trapped beetles in most cases differed significantly among individual years. Over the entire monitoring period, 55.2% of the beetles were trapped in June, 31.2% in July and 13.5% in August (difference among individual months significant at p < .0001). In conclusion, the study demonstrated the seasonal flying patterns of S. multistriatus, suggesting that the removal of trees attacked in the previous vegetation period as a combat measure should be completed before the beginning of the flying season of S. multistriatus, and that the application of the integrated DED management has the potential to arrest the development of the disease in a geographically isolated area such as Gotland.

Keywords

Scolytus multistriatus; disease management; Fungal pathogens; Ophiostoma novo-ulmi

Published in

Scandinavian Journal of Forest Research
2016, Volume: 31, number: 3, pages: 237-241
Publisher: TAYLOR & FRANCIS AS

    SLU Authors

    • Menkis, Audrius

      • Department of Forest Mycology and Pathology, Swedish University of Agricultural Sciences
      • Östbrant, Inga-Lena

        • Department of Forest Mycology and Pathology, Swedish University of Agricultural Sciences
        • Vasaitis, Rimvydas

          • Department of Forest Mycology and Pathology, Swedish University of Agricultural Sciences

        Associated SLU-program

        SLU Plant Protection Network

        UKÄ Subject classification

        Forest Science
        Microbiology

        Publication Identifiers

        DOI: https://doi.org/10.1080/02827581.2015.1076888

        Permanent link to this page (URI)

        https://res.slu.se/id/publ/74274