Journal of Forest Science, 2005 (vol. 51), issue 8
Occurrence, development and harmfulness of the bark anobiid Ernobius mollis(L.) (Coleoptera: Anobiidae)
J. Urban
J. For. Sci., 2005, 51(8):327-347 | DOI: 10.17221/4569-JFS 
The paper summarizes results of the study of the occurrence, development and harmfulness of Ernobius mollis (Linnaeus, 1758), which occurred plentifully on Pinus nigra Arn. impaired by drought in the CR in 2000. It is based on laboratory rearings in photoeclectors and numerous analyses of branches (stems) of pines from 5 localities in Brno. Partial studies were carried out in 5 other localities in Moravia and Eastern Bohemia. Under laboratory conditions, imagoes occurred mainly in June-August, viz at a 1 ♂: 3 ♀♀ ratio. Males and females were on average 4.4 and 4.9 mm long, respectively. In living trees, imagoes...
About phytopathological and histological aspects of Norway spruce dieback in the Orlické hory Mts.
M. Čermák, M. Martinková, D. Palovčíková, L. Jankovský
J. For. Sci., 2005, 51(8):348-358 | DOI: 10.17221/4570-JFS
The condition was evaluated of tissues of declining young spruce stands in selected localities of the Orlické hory Mts. It refers to stands occurring in top parts affected by an air pollution disaster in the last century. Several types of damage of a different symptomatic character were distinguished. A high NOx input appears to be the risk factor of spruce dieback in the Orlické hory Mts. One of the main causes in the complex of factors is the unbalanced cause of meteorological factors during the year and unbalance in mineral nutrition. The result is decrease in lignification, immaturity of tissues before the winter period and increased...
Population dynamics of eight-toothed spruce bark beetle (Ips typographus[L.]) in the area of National Nature Reserve Praděd in 1998-2001
P. Plašil, P. Cudlín
J. For. Sci., 2005, 51(8):359-370 | DOI: 10.17221/4571-JFS
The paper deals with the study of bionomics and population dynamics of Ips typographus (L.) in the area of the Praděd National Nature Reserve (NNR). Data were collected on the basis of detected feeding marks, beetles caught in traps, and also according to the frequency of occurrence or increase in the number of standing dead trees killed by the bark beetle attack in localities where sanitation felling was not performed. Finally, evaluation of the present condition of forest stand and population dynamics of Ips typographus was carried out. The results showed that the stands currently occur in the stage of disintegration when the role...
A role of the mechanical preparation of soil in the natural regeneration of pedunculate oak (Quercus robur L.) in floodplain forests
K. Houšková
J. For. Sci., 2005, 51(8):371-379 | DOI: 10.17221/4572-JFS
The subject of our research was to verify effects of the mechanical preparation of soil in the natural regeneration of pedunculate oak in a floodplain forest. On the site of a hard-wooded floodplain forest at the confluence of the Morava and Dyje rivers (Czech Republic), several sample plots were established differing in the preparation of soil during regeneration, in weeding the plots and in the period of the implementation of soil surface scarification before and after the fall (or distribution) of acorns. On the basis of results obtained, mechanical preparation of soil on non-weed-infested plots in the heavy seed year is not necessary, however,...