scholarly journals Notes to distribution and seasonal activity of spruce diprionids (Hymenoptera: Diprionidae) in the eastern part of the Czech Republic

2012 ◽  
Vol 50 (No. 12) ◽  
pp. 579-585 ◽  
Author(s):  
J. Holuša ◽  
L. Roller
Keyword(s):  
Czech Republic ◽  
Bark Beetle ◽  
Seasonal Activity ◽  
The Czech Republic ◽  
Emergence Trap ◽  
Baited Traps ◽  
Malaise Traps

A study of diprionids associated with spruce was done at 31 sites of the eastern part of the Czech Republic in 1988–2003. In total 45 specimens belonging to Gilpinia abieticola (6 specimens), G. hercyniae (3) and G. polytoma (36) were collected using Malaise traps, emergency traps, bark-beetle pheromone baited traps or sweeping. The spruce diprionids were recorded in 30% of the studied sites only. G. polytoma was the most abundant and it is probably bivoltine with adult activity from April to August. The results of emergence trap-monitoring in Paskovský les indicate that this species is in latency.

scholarly journals Neuroptera, Raphidioptera and Mecoptera assemblages inhabiting young spruce (Picea abies) forests: dominance structure and seasonal activity patterns

2008 ◽  
Vol 53 (Special Issue) ◽  
pp. 74-81 ◽  
Author(s):  
Ľ. Vidlička ◽  
J. Holuša
Keyword(s):  
Czech Republic ◽  
Picea Abies ◽  
Activity Patterns ◽  
Abundant Species ◽  
Flight Activity ◽  
Seasonal Activity ◽  
Spruce Forest ◽  
The Czech Republic ◽  
Dominance Structure ◽  
Malaise Traps

Neuropteroid insects (Neuroptera, Raphidioptera) and scorpion flies (Mecoptera) were studied in six young spruce forest localities in the eastern part of the Czech Republic during years 2005 and 2006. Twenty-seven species of lacewings, four species of snake flies and four species of scorpion flies were found using the Malaise traps. Consequently, the seasonal flight activity of the seven most abundant species (<I>Chrysopa perla, Hemerobius pini, Hemerobius humulinus, Dichrostigma flavipes, Phaeostigma notata, Panorpa communis and Panorpa germanica</i>) is discussed.

scholarly journals Contribution to bionomy of Hylesinus fraxini (Coleoptera: Curculionidae: Scolytinae) and its monogamy in the Czech Republic

2015 ◽  
Vol 61 (4) ◽  
pp. 240-245
Author(s):  
Karolina Lukášová ◽  
Soňa Zimová
Keyword(s):  
Czech Republic ◽  
Bark Beetle ◽  
Bark Beetles ◽  
Second Generation ◽  
Female Offspring ◽  
Fraxinus Excelsior ◽  
The Czech Republic ◽  
Gallery System

Abstract This study focused on bionomics of the ash bark beetle Hylesinus fraxini (Panzer 1779). The study area was at Jílové u Prahy in the Central Bohemian Region of the Czech Republic. In February 2014, three common ash (Fraxinus excelsior) trees were felled and Hylesinus fraxini infestation was subsequently observed from March. Beetles were collected from 20 debarked logs and dissected under stereomicroscope, and their sex was determined. Five logs with bark beetles were placed into photoeclectors. Beetles that emerged were collected and put into the second photoeclector with fresh ash wood to determine whether they would establish the second generation. The analysis showed that each gallery system with a pair of bark beetles contained one male with only one female. If one adult of H. fraxini was found in the gallery system, it was usually female. Therefore, possible polygamy of Hylesinus fraxini was not confirmed in Central Bohemia. Maternal gallery length significantly correlated with the number of eggs laid per female. Offspring beetles did not establish the second generation, as only maturation feeding occurred in fresh wood.

scholarly journals The Impacts of Calamity Logging on the Development of Spruce Wood Prices in Czech Forestry

Forests ◽  
2020 ◽  
Vol 11 (3) ◽  
pp. 283 ◽  
Author(s):  
Daniel Toth ◽  
Mansoor Maitah ◽  
Kamil Maitah ◽  
Veronika Jarolínová
Keyword(s):  
Czech Republic ◽  
Bark Beetle ◽  
Bark Beetles ◽  
The Czech Republic ◽  
Wood Harvesting ◽  
Spruce Bark ◽  
Spruce Wood ◽  
Forestry Sector ◽  
Socio Economic Impact ◽  
The Relationship

Currently, the decline in spruce wood prices is a serious problem for the forestry sector in the Czech Republic. We estimate that the fall in wood prices in European markets causes losses not only to the forestry companies producing, harvesting, and processing the wood, but also to the workers in the sector. These losses are mainly caused by a combination of several natural factors: drought, climate change, and the effects of bark beetles. In particular, spruce bark beetles cause the greatest damage. Due to this bark beetle calamity, unplanned logging has increased. In 2019, these damages have culminated. Almost 100 million m3 of wood has been harvested over the last decade due to the bark beetle and more than half of this volume has been mined in the last four years. Therefore, the losses in the forestry sector are around EUR 1.12 billion. The aim of this study is an analysis of the relationship between the volume of incidental logging and the decline in the price of spruce wood. These results show the strong correlation between the measure of unplanned wood harvesting and the decrease in wood prices, as well as an estimate of price development if the upward trend of incidental mining continues. The average price of wood in the Czech Republic could thus reach a historical minimum of EUR 79.39 per m3 of spruce and category SM/JE II (spruce/fir). In addition, the decline in wood prices will be reflected in the management of forestry and timber businesses, including stagnant wages for forestry workers. The socio-economic impact of the bark beetle calamity is high and is most affected by the decline in spruce timber prices.

scholarly journals Chrysopids and Hemerobiids (Plannipenia) of young spruce forests in the eastern part of the Czech Republic 

2019 ◽  
Vol 48 (No. 10) ◽  
pp. 432-440 ◽  
Author(s):  
J. Holuša ◽  
Ľ. Vidlička
Keyword(s):  
Czech Republic ◽  
Abundant Species ◽  
Flight Activity ◽  
The Czech Republic ◽  
Spruce Forests ◽  
Chrysopa Carnea ◽  
Malaise Traps

Chrysopids and Hemerobiids were studied using Malaise traps in young spruce forests in the eastern part of the Czech Republic. A total of 12 species were found. The most abundant species were eurytopic Chrysopa carnea, Chrysopa perla, Hemerobius humulinus and Hemerobius pini associated with conifers. The seasonal flight activity of these species is discussed.

scholarly journals Flight activity of Anthribus nebulosus Forster, 1770 (Coleoptera: Anthribidae) and notes to its life history

2008 ◽  
Vol 53 (Special Issue) ◽  
pp. 11-15 ◽  
Author(s):  
J. Holuša ◽  
M. Trýzna
Keyword(s):  
Life History ◽  
Czech Republic ◽  
Flight Activity ◽  
Forest Steppe ◽  
The Czech Republic ◽  
Rainy Weather ◽  
Significant Difference ◽  
Lowland Forests ◽  
Males And Females ◽  
Malaise Traps

In the Czech Republic, <I>A. nebulosus</I> occurs in coniferous, deciduous as well as in mixed forests, in lowland forests and even on forest-steppe habitats. Larvae occur mainly on <I>Picea</I> sp., Pinus</I> sp. and<I> Abies</I> sp.; adults occur on the same tree species and also on <I>Larix</I> sp., <I> Quercus</I> sp., <I>Salix</I> sp. and<I> Fagus</I> sp. Adults overwinter in the bark of several coniferous trees with thicker bark (mainly <I>Pinus sylvestris</I> L. and <I>Larix decidua</I> Mill.) where they are hidden in cracks. Woodpeckers attack such trees with masses of<I>A. nebulosus</I> very intensively. In five localities with Malaise traps in the Nízký Jeseník Hills, the flight activity started at the beginning of May and ended in mid-June with the peak at the end of May and beginning of June in 2005. In 2006, the flight activity started later in mid-May and lasted to the beginning of July but was interrupted by cold and rainy weather. At higher altitudes were beetles sampled only in the first half of June in 2006. The size of males and females is very similar. In total, pronotum width of males varied between 0.85 mm and 2.40 mm, and females between 1.00 mm and 2.30 mm. There is no statistically significant difference between them. The equal sex ratio found in our material could confirm the fact that the flight activity of both sexes is the same.

scholarly journals Geographical variability of sprucebark beetle development under climate change in the Czech Republic

2011 ◽  
Vol 57 (No. 6) ◽  
pp. 242-249 ◽  
Author(s):  
T. Hlásny ◽  
L. Zajíčková ◽  
M. Turčáni ◽  
J. Holuša ◽  
Z. Sitková
Keyword(s):  
Climate Change ◽  
Czech Republic ◽  
Bark Beetle ◽  
Ips Typographus ◽  
The Czech Republic ◽  
Distant Future ◽  
Spruce Bark Beetle ◽  
Spruce Bark ◽  
Generation Regime ◽  
Near Future

Climate change is expected to influence the distribution and population dynamics of many insect pests, with potential severe impacts on forests. Spruce bark beetle Ips typographus (L.) (Col.: Curculionidae, Scolytinae) is the most important forest insect pest in Europe whose development is strictly regulated by air temperature. Therefore, climate change is anticipated to induce changes in the pest's distribution and development. We used the PHENIPS model to evaluate climate change impacts on the distribution and voltinism of spruce bark beetle in the Czech Republic. Two future time periods &ndash; 2025&ndash;2050 (near future) and 2075&ndash;2100 (distant future) &ndash; are addressed. The period 1961&ndash;1990 is used as the reference. We found that while a two-generation regime dominated in the Czech Republic in the reference period, significant three-generation regime regions are projected to appear in the near future. In the distant future, the three-generation regime can be expected to occur over all existing coniferous stands in the Czech Republic. The analysis of altitudinal shift of n-generation regime regions indicates noticeable expansion of Ips typographus development to higher elevations, leading for example to disappearance of one-generation regime regions in the distant future. Uncertainties and limitations of the presented findings are discussed as well.

scholarly journals Efficacy of synthetic lures for pine bark beetle monitoring

2022 ◽  
Vol 68 (No. 1) ◽  
pp. 19-25
Author(s):  
Miloš Knížek ◽  
Jan Liška ◽  
Adam Véle
Keyword(s):  
Bark Beetle ◽  
Bark Beetles ◽  
Large Scale ◽  
Ips Typographus ◽  
Pine Plantations ◽  
The Czech Republic ◽  
Long Run ◽  
Baited Traps ◽  
Pine Trees ◽  
Ips Sexdentatus

The Scots pine (Pinus sylvestris) plantations in central Europe are currently damaged by a large-scale infestation by bark beetles (Scolytinae). Ips acuminatus and Ips sexdentatus are among the most aggressive species causing infestations of pine trees that are currently simultaneously attacked by Ips typographus. In pine plantations prone to damage, it is therefore necessary to carry out the bark beetle monitoring. One of the used methods is the pheromone bark beetle trapping using synthetic lures. The efficacy of synthetic lures differs. We tested the efficacy of commercially available lures used in the protection of pine trees. In total, we deployed 10 trap series, each consisting of traps with eight different lures and two unbaited traps (controls). Ips acuminatus and I. sexdentatus were most abundantly captured in Pheagr-IAC- and Sexowit-baited traps. Interestingly, the spruce species I. typographus was also captured and most often found in traps with Pheagr-IAC and Erosowit Tube lures. The number of captured beetles was consistent with the gradation phase of bark beetles. Our results suggest the suitability of pheromone traps for bark beetle monitoring. The use of Sexowit can be recommended especially in southwestern Moravia, where I. sexdentatus occurs in high numbers in the long run. In other parts of the Czech Republic, Pheagr-IAC alone can be used with sufficient efficacy. The use of the Erosowit Tube lure is also suitable for I. typographus and I. sexdentatus monitoring.

scholarly journals Interesting records of fungus gnats (Diptera: Mycetophilidae) from the Krkonoˇe Mts (Czech Republic)

2011 ◽  
Vol 60 (3) ◽  
pp. 213-216
Author(s):  
Jan ˇevčík
Keyword(s):  
Czech Republic ◽  
The Czech Republic ◽  
Fungus Gnats ◽  
Malaise Traps

Interesting records of fungus gnats (Diptera: Mycetophilidae) from the Krkonoˇe Mts (Czech Republic) Twelve species of Mycetophilidae are recorded from the Krkonoˇe Mts as new to Bohemia or the entire Czech Republic. The material was obtained in the years 2006-2009 mainly by means of Malaise traps. Three species are new to the Czech Republic: Mycomya collini Edwards, 1941, Leia martinovskyi ˇevčík & Papp, 2003 and Pseudexechia tuomikoskii Kjærandsen, 2009.

scholarly journals Fumigation of Insect-Infested Wooden Logs by EDN Using Two Scenarios of Plastic Tent-Tarpaulin Sealing: Wooden Logs Stacks Placed on Bottom Plastic Sheets or Directly on Underlying Soil

2021 ◽  
Vol 13 (23) ◽  
pp. 13377
Author(s):  
Jonas Hnatek ◽  
Vaclav Stejskal ◽  
Tomas Vendl ◽  
Radek Aulicky ◽  
Jarmila Malkova ◽  
...  
Keyword(s):  
Czech Republic ◽  
Bark Beetle ◽  
Pest Control ◽  
Bark Beetles ◽  
Temporal Dynamics ◽  
Plant Protection ◽  
Field Trials ◽  
Initial Field ◽  
The Czech Republic ◽  
Forest Conditions

Recently, the largest bark beetle calamity (Ips typographus) of the last 100 years has erupted in Central Europe, including the Czech Republic. This calamity may threaten the sustainability of growing large areas of monoculture Norway spruce (Picea abies) in this area. Limited economically feasible physical and chemical pest control options are available to prevent the bark beetle spread. However, from these options, only mechanical bark removal or gas-insecticide fumigation result in instant deactivation of all pest stages throughout the entire stack of stored logs. Due to the ban on the use of methyl bromide (MeBr) for the fumigation of log piles under tarpaulin, the adaptation of the phyto-quarantine method EDN to the destruction of I. typographus bark beetles in harvested wood directly in forests was newly proposed in the Czech Republic. The methodical experience with fumigation of the harvested logs, however, was only available for wood fumigation in chambers or in tent-tarps fumigation placed on paved (concrete/asphalt) surfaces mainly in ship harbors. Prior to the introduction of the new EDN fumigation method of bark beetle infested wood stored directly in the forests, it was initially unclear whether it was necessary to use or neglect bottom sheets to optimize exposure and maximize Ct products for the permitted fixed initial dose (50 g·m−3). Therefore, the initial validation pilot trials were aimed at the estimation and comparison of EDN temporal dynamics and Ct products under real forest conditions and two fumigation scenarios: Wooden log pile placed on bottom plastic sheets or directly on soil without the bottom sheets. Field trials were performed under both identical as well as different environmental conditions. In addition, they revealed that the concentration decrease was significantly faster and Ct products were significantly lower in the case of trials without the bottom sheets. The experiments indicated high EDN sorption by the uncovered soil under the tent. Quantitatively, the average Ct product was 4.8 (identical conditions) and 3.7 (different conditions) times lower in EDN trials without the bottom sheets when compared to the use of bottom sheets. The initial field-forest fumigation validation trials indicated a necessity to carry out EDN fumigation under tent-tarps also using bottom sheets, although this fumigation procedure increases the labor-demands to some extent. Based on the presented results and additional data, the Czech authority issued for the EDN plant protection product an authorization for the limited and controlled use of wooden logs. Therefore, this work became the basis of the historically and first officially authorized use of any fumigant for pest control under commercial forest conditions.

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