Abstract: | In Romania still are natural beech forest with high productive potential and resistance to biotic factors action. However climatic factors (severe drought of 1999 - 2004, 2007 – 2008 and 2011 - 2012 especially in central and eastern regions) have released the recent European beech decline in Romania. This phenomenon has generally occurred in old (>100 years), (almost) pure, and high productive stands, situated especially on plain sites with excessive clayey soils or on slopes with shallow or sandy soils. At the same time, in many stands, silvicultural operations (release cutting, cleaning, thinning), were not applied in time, therefore have been installed many different harmful species on beech. At the beech leaves, attacks were reported from the following species:
Insects: Mikiola fagi Htg., Fagocyba cruenta Herrich-Schaeffer., Phyllonorycter maestingella Zll., Phyllocnistis unipunctella Steph. end Diurnea fagella Denis et Schiff.
Mites: Aceria nervisequa faginea Nal. end Aceria nervisequa nervisequa Nal.
Fungi: Apiognomonia fagi West. |
