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Actual status of the beech bark necrotic disease in NorthWestern Bulgaria

Author

Listed:
  • A. Cicák

    (Institute of Forest Ecology of the Slovak Academy of Sciences, Zvolen, Slovak Republic)

  • I. Mihál

    (Institute of Forest Ecology of the Slovak Academy of Sciences, Zvolen, Slovak Republic)

  • Ch. Tsakov

    (Forest Research Institute of the Bulgarian Academy of Sciences, Sofia, Bulgaria)

  • P. Petkov

    (Forest Research Institute of the Bulgarian Academy of Sciences, Sofia, Bulgaria)

Abstract

In this paper we present recent findings about the beech bark necrotic disease in selected localities situated in the mountain ranges Vitosha and Stara planina in Bulgaria. The resulting values of necrotic disease expressed by the necrotisation index (ISN) ranged from 0.72 to 1.12. In Slovakia such low values of ISN were obtained only for seven out of 52 examined localities. The ISN results are more favourable than the results obtained using the same methods for four localities situated in Northern Hungary (ISN values ranging from 1.11 to 1.18). The results of monitoring of three selected biotic vectors of beech necrotic disease were follows: the focus of occurrence of the species Bucculatrix ulmella was in submountain beech forests. Considerable affinity to lower situated sites was found in Ectoedemia liebwerdella. We also found that the boundary of the occurrence of this species is approximately at 1,000 m a.s.l. The frequency values of Cryptococcus fagi were significantly influenced by the altitude. In four out of six localities we recorded the occurrence of three species of the genus Nectria: Nectria cosmariospora, Nectria galligena and Nectria coccinea.

Suggested Citation

  • A. Cicák & I. Mihál & Ch. Tsakov & P. Petkov, 2006. "Actual status of the beech bark necrotic disease in NorthWestern Bulgaria," Journal of Forest Science, Czech Academy of Agricultural Sciences, vol. 52(5), pages 226-232.
    • Handle: RePEc:caa:jnljfs:v:52:y:2006:i:5:id:4505-jfs
    DOI: 10.17221/4505-JFS
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