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Spatial distribution of four spruce bark beetles in north-western Slovakia
infested spruces spatial distribution kriging
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2015/3/6
Infestation density of four the most common spruce bark beetle species was estimated on 15 study sites (10 trees per site) in the Kysuce model region in 2006. Five half-metre long sections of the stem...
Spatio-temporal patterns of the Norway spruce decline in the Beskid Śląski and Żywiecki (Western Carpathians) in southern Poland
bark beetles mountain forests spatial analysis
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2015/3/6
A dramatic forest decline due to the bark beetle outbreak, which occurs in the Norway spruce stands in the Western Beskidy (southern Poland) since 2003, was started after severe physiological drought ...
The influence of irradiation on the behaviour and reproduction success of eight toothed bark beetle Ips typographus (Coleoptera: Scolytidae)
Ips typographus irradiation sterile insect technique
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2015/3/6
Irradiation experiments on Ips typographus (L., 1758) with doses of 15 and 30 Gy (cobalt 60) were conducted in 2006. The effect of irradiation on the mating behaviour and reproduction success of the b...
The results of manipulated experiments with inoculation of Ips typographus (L., 1758) to spruce trees under various levels of water stress
Ips typographus spruce water stress
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2015/3/6
Manipulated experiments with males of Ips typographus (L., 1758) were conducted in spruce stands in north-western Slovakia. Some of trees were stressed by a lack of water caused by preparation of roof...
Ecological conditions influencing the localization of egg-laying by females of the cockchafer (Melolontha hippocastani F.)
Melolontha hippocastani F. white grub feeding losses in forest plantation
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2015/3/6
We explored the ecological conditions, which influence the female Melolontha hippocastani F. in their selection of the locality for laying eggs. In the region of mass outbreak of M. hippocastani in th...
Flight activity of Anthribus nebulosus Forster, 1770 (Coleoptera: Anthribidae) and notes to its life history
flight activity body size Czech Republic
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2015/3/6
In the Czech Republic, A. nebulosus occurs in coniferous, deciduous as well as in mixed forests, in lowland forests and even on forest-steppe habitats. Larvae occur mainly on Picea sp., Pinus sp. and ...
The fauna of cambioxylophagous insects on Scots pine trees declined after spells of drought in 2003
cambioxylophagous insects Scots pine drought spell
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2015/3/6
The paper deals with cambioxylophagous insects on Scots pine (Pinus sylvestris L.) trees. Research was conducted in forest stands growing on steep slopes on the left bank of the Otava River about 1 km...
Parasitic Hymenoptera associated with Thecodiplosis brachyntera (Diptera: Cecidomyiidae) on the genus Pinus (Pinaceae) in the Czech Republic
Eulophidae Torymidae Encyrtidae
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2015/3/6
Aprostocetus micantulus (Thomson, 1878) (Chalcidoidea: Eulophidae), Torymus heyeri Wachtl, 1833 (Chalcidoidea: Torymidae), Pseudencyrtus idmon (Walker, 1848) (Chalcidoidea: Encyrtidae) and Platy-gaste...
Occurrence, biology and harmfulness of Galerucella lineola (F.) (Coleoptera, Chrysomelidae) – Part 1. Last year’s (parent) beetles
host species hibernation feeding
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2015/3/6
In Moravia in 1995 to 2006, the abundant occurrence of Galerucella lineola (F.) was used to study its occurrence, biology and harmfulness. An “alder” biological form was studied in Alnus glutinosa and...
Occurrence, biology and harmfulness of Galerucella lineola (F.) (Coleoptera, Chrysomelidae) – Part 2. Larvae and this year’s beetles
generation conditions natural enemies harmfulness
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2015/3/6
The second part of the paper deals with the development and harmfulness of larvae and maturation feeding of this year’s beetles of Galerucella lineola (F.) before leaving for winter habitats. Embryoge...
Cambioxylophagous fauna of young spruce stands damaged by snow in the Beskids
Norway spruce the Beskids cambioxylophages
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2015/3/6
In 25 to 40-years-old stands damaged by snow in the Beskids, the fauna of cambioxylophages was analyzed both on standing breaks and lying break-off stems. Breaks are characterized by the gradually dry...
The authors elaborated a new complex methodical approach to the evaluation of necrotic disease of beeches. They used two evaluation scales: a scale for the evaluation of stems and a scale for the eval...
Feeding ecology of pine shoot beetles (Tomicus spp.) in tree crowns of Scots pine (Pinus sylvestris L.) stands under one-year outbreak
Tomicus piniperda T. minor Pinus sylvestris
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2015/3/5
Studies were carried out in southern Poland during 2002–2006 in Scots pine stands under the effect of an outbreak of pine shoot beetles. The qualitative aspects of beetle feeding in tree crowns, studi...
Comparison of Norway spruce (Picea abies [L.] Karst.), Scots pine (Pinus sylvestris L.) and European larch (Larix decidua Mill.) stem shape by means of geometrical methods
Norway spruce Scots pine European larch stem shape
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2015/3/3
In this article the stem shape is compared in three coniferous tree species: Norway spruce, Scots pine
and European larch. Stem is investigated by means of geometrical methods. Simplified Bookstein ...
Dynamics of the health status of forest stands and its prediction on research plots in the Šumava Mts.
health status defoliation air-pollution and ecological stress
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2015/3/3
The paper summarises the evaluation of the health status dynamics of allochthonous spruce stands in
the Modrava Forest District and of natural stands in the Plešny Forest District. Analysis is ...