scholarly journals Variability of Selected Traits of Ips Typographus (L.) (Col.: Scolytinae) Populations In Beskid Żwiecki (Western Carpathians, Poland) Region Affected By Bark Beetle Outbreak

2014 ◽  
Vol 56 (2) ◽  
pp. 79-92 ◽  
Author(s):  
Wojciech Grodzki ◽  
Jerzy R. Starzyk ◽  
Mieczysław Kosibowicz
Keyword(s):  
Sex Ratio ◽  
Bark Beetle ◽  
Tree Mortality ◽  
Reproductive Potential ◽  
Ips Typographus ◽  
Spruce Stands ◽  
Gallery System ◽  
Infestation Density ◽  
Selected Traits ◽  
Very High

Abstract In 2010-2012, investigations on Ips typographus populations were carried out in Norway spruce stands recently affected by bark beetle outbreak in the Beskid Żywiecki Mts. in Poland. The aim of the study was to test the usefulness of several traits describing I. typographus populations for evaluation of their actual outbreak tendency. Infestation density, sex ratio, gallery length, progeny number and beetle length were used as the traits. Trait variability was analyzed in relation to infested tree mortality in the current year of observation and outbreak tendency defined by the comparison of data on tree mortality in the current year and that in the year before. The highest infestation density was found in the stands representing the highest tree mortality in the current year and in those characterized by decreasing outbreak tendency. The gallery system with 2 maternal galleries dominated. The sex ratio of attacking beetles inclined towards females (63.8%) and remained stable during 3 years of observations; the highest percentage of females was found in locations being in stabilization/latency outbreak phase. The length of maternal galleries was somewhat negatively affected by infestation density and positively correlated with the number of progeny in the gallery. The average beetle length was 4.800 mm (± 0.293), ranging between 3.718 and 5.817 mm and being the highest in the uppermost class of tree mortality recorded in the current year of observation. The shortest beetles were collected in the stands with increasing outbreak tendency, and slightly longer - in the stands with outbreak stable and decreasing tendencies. None of the traits tested can be selected as a direct indicator for prediction of outbreak tendency in I. typographus populations. Possible reasons of variability in the analyzed traits are discussed. The traits indicate that I. typographus in the study area represent very high reproductive potential, thus the risk of repeated outbreak is very high

scholarly journals An attempt to use the fungus Beauveria bassiana (Bals.) Vuill. in forest protection against the bark beetle Ips typographus (L.) in the field

2015 ◽  
Vol 76 (1) ◽  
pp. 5-17 ◽  
Author(s):  
Wojciech Grodzki ◽  
Mieczysław Kosibowicz
Keyword(s):  
Beauveria Bassiana ◽  
Bark Beetle ◽  
Bark Beetles ◽  
Tree Mortality ◽  
Ips Typographus ◽  
Forest Environment ◽  
Forest Protection ◽  
Spruce Stands ◽  
Insect Populations ◽  
Fungus Beauveria Bassiana

Abstract In 2011-2013, trials on the use of the entomopathogenic fungus Beauveria bassiana against bark beetle (Ips typographus) populations were carried out under open field conditions in Norway spruce stands suffering from an outbreak in the Beskid Żywiecki Mts. in Poland. Modified pheromone traps were deployed to capture and thereafter release fungus-infected bark beetles to the forest environment. Infested spruce trees felled next to the traps remained unaffected by the transmission of the fungus to insect populations. Direct spraying or dusting of lying trap logs and suspended caged rearing bolts did not have any effect on spruce infestation by I. typographus, its reproduction success and development or natural enemies inside the bark. A very small effect on mortality rates of target as well as non-target insects overwintering in the dusted litter was observed. Treated stands, unlike control stands, were indirectly affected by the treatment, evidenced by the reduction of tree mortality due to bark beetle infestation. At present, no recommendations concerning the potential use of the fungus in forest protection can be given. However such an environmentally friendly approach represents a promising future prospect.

scholarly journals Occurrence of Ips typographus (L.) after wind damage in the Kościeliska Valley of the Tatra National Park

2017 ◽  
Vol 78 (2) ◽  
pp. 113-119 ◽  
Author(s):  
Wojciech Grodzki ◽  
Wojciech Gąsienica Fronek
Keyword(s):  
Norway Spruce ◽  
Bark Beetle ◽  
National Park ◽  
Ips Typographus ◽  
Passive Protection ◽  
Protection Zone ◽  
Active Protection ◽  
Spruce Stands ◽  
Infestation Density ◽  
Tatra National Park

Abstract At the end of 2013, Norway spruce stands in the area of the Tatra National Park were severely damaged by strong storms especially in the Kościeliska Valley region. In the following spring of 2014, a survey recording the occurrence of the spruce bark beetle Ips typographus (Coleoptera, Curculionidae, Scolytinae) was initiated in order to describe the dynamics of beetle reproduction in relation to protection measures executed in wind-damaged stands. Ten research plots with 20 trees each were established in a socalled active protection zone, where the broken and fallen trees had been processed and removed in 2014, and in a passive protection zone, where no actions were taken, and the dynamics of Norway spruce mortality due to bark beetle infestation including quantitative parameters (infestation density, sex ratio of beetle populations) were examined. The entomological analyses were performed on 25 × 25 cm large bark samples taken from four (active zone) or two (passive zone) tree sections. In the first year of the survey, no infested standing trees were recorded on the plots and the colonisation of fallen and broken trees was very weak. In the second year (2015), infestations appeared in larger numbers on the plots with passive compared to active protection but the infestation density was 0.89 mating chambers per 1 dm2 regardless of the protection status. In the third year (2016), most of the remaining living spruces had been infested with a mean density of 0.82 m.ch. per 1 dm2. In 2015, the proportion of females in the beetle population was 65.8% being higher in the active (68.4%) than the passive (64.0%) protection zone, while in 2016 the proportion was 63.5% and in this case slightly higher in the passive protection zone (63.9% as compared to 63.2%). These results are in accordance with patterns observed in wind-damaged Norway spruce stands of other areas in Poland and Europe and demonstrate the usefulness of forest management procedures in mitigating I. typographus outbreaks.

scholarly journals Occurrence of the European spruce bark beetle Ips typographus (L.) and six-toothed spruce bark beetle Pityogenes chalcographus (L.) in spruce stands damaged by wind in the Świętokrzyskie Mountains

2011 ◽  
Vol 72 (1) ◽  
pp. 31-36
Author(s):  
Andrzej Borkowski
Keyword(s):  
Bark Beetle ◽  
Ips Typographus ◽  
Pityogenes Chalcographus ◽  
Spruce Bark Beetle ◽  
Spruce Bark ◽  
Spruce Stands ◽  
European Spruce Bark Beetle

Występowanie kornika drukarzaIps typographus(L.) i rytownika pospolitegoPityogenes chalcographus(L.) w drzewostanach świerkowych uszkodzonych przez wiatr w Górach Świętokrzyskich

scholarly journals Infection levels of pathogens in the European spruce bark beetle Ips typographus (Coleoptera: Curculionidae) at managed and unmanaged forest locations: a meta-data analysis

2016 ◽  
Vol 62 (4) ◽  
pp. 216-222
Author(s):  
Hana Vanická ◽  
Karolina Lukášová ◽  
Jaroslav Holuša
Keyword(s):  
Data Analysis ◽  
Population Density ◽  
Bark Beetle ◽  
Meta Analysis ◽  
Ips Typographus ◽  
Spruce Bark Beetle ◽  
Spruce Bark ◽  
Spruce Stands ◽  
Unmanaged Forest ◽  
European Spruce Bark Beetle

Abstract Forest management greatly affects the population density of the European spruce bark beetle, Ips typographus. In this study, a meta-analysis was used to determine whether infection levels of pathogens of I. typographus differ between managed and unmanaged spruce stands. The analysis used data from 10 publications and a total of 61 locations. The results indicated that infection levels of the most common pathogens (ItEPV, Gregarina typographi, and Mattesia schwenkei) are higher in unmanaged than in managed locations. The only exception is the microsporidium Chytridiopsis typographi, which is more common in managed than in unmanaged locations. Our meta-analysis indicates that pathogen levels are generally higher in unmanaged than in managed locations.

scholarly journals Dynamics of the health status of forest stands and its prediction on research plots in the Šumava Mts.

2012 ◽  
Vol 52 (No. 10) ◽  
pp. 457-473
Author(s):  
S. Vacek ◽  
V. Podrázský ◽  
K. Matějka
Keyword(s):  
Health Status ◽  
Bark Beetle ◽  
Mixed Forest ◽  
Ips Typographus ◽  
Forest Stands ◽  
Tree Damage ◽  
Spruce Stands ◽  
Damage Dynamics ◽  
Natural Stands ◽  
Forest District

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 Plešný Forest District. Analysis is based on dendroecological reactions of particular tree individuals in the stand texture. The tree damage was evaluated annually (in the period 1997–2005), based especially on defoliation. The most tolerant were the natural and semi-natural, especially mixed forest stands with dominant beech in the Plešný Forest District territory, the least tolerant were the allochthonous secondary spruce stands in the Modrava Forest District area. The damage dynamics was limited by the insect (bark beetle – Ips typographus) pest activity. Ozone damage appeared much more often in 2002, compared to the year 1999. The most damaged species were sycamore and rowan tree.

scholarly journals Mapping European Spruce Bark Beetle Infestation at Its Early Phase Using Gyrocopter-Mounted Hyperspectral Data and Field Measurements

2021 ◽  
Vol 13 (22) ◽  
pp. 4659
Author(s):  
Florian M. Hellwig ◽  
Martyna A. Stelmaszczuk-Górska ◽  
Clémence Dubois ◽  
Marco Wolsza ◽  
Sina C. Truckenbrodt ◽  
...  
Keyword(s):  
Bark Beetle ◽  
Early Stage ◽  
Field Measurements ◽  
Ips Typographus ◽  
Hyperspectral Data ◽  
Spruce Bark ◽  
Attack Phase ◽  
Preliminary Study ◽  
Very High

The prolonged drought of recent years combined with the steadily increasing bark beetle infestation (Ips typographus) is causing enormous damage in Germany’s spruce forests. This preliminary study investigates whether early spruce infestation by the bark beetle (green attack) can be detected using indices based on airborne spatial high-resolution (0.3 m) hyperspectral data and field spectrometer measurements. In particular, a new hyperspectral index based on airborne data has been defined and compared with other common indices for bark beetle detection. It shows a very high overall accuracy (OAA = 98.84%) when validated with field data. Field measurements and a long-term validation in a second study area serve the validation of the robustness and transferability of the index to other areas. In comparison with commonly used indices, the defined index has the ability to detect a larger proportion of infested spruces in the green attack phase (60% against 20% for commonly used indices). This index confirms the high potential of the red-edge domain to distinguish infested spruces at an early stage. Overall, our index has great potential for forest preservation strategies aimed at the detection of infested spruces in order to mitigate the outbreaks.

scholarly journals Declining Bark Beetle Densities (Ips typographus, Coleoptera: Scolytinae) from Infested Norway Spruce Stands and Possible Implications for Management

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Alexander Angst ◽  
Regula Rüegg ◽  
Beat Forster
Keyword(s):  
Bark Beetle ◽  
Insect Pest ◽  
Buffer Zone ◽  
Ips Typographus ◽  
Buffer Zones ◽  
The Past ◽  
Spruce Bark ◽  
Spruce Stands ◽  
Open Land ◽  
Trap Catches

The eight-toothed spruce bark beetle (Ips typographus) is the most serious insect pest in Central European forests. During the past two decades, extreme meteorological events and subsequent beetle infestations have killed millions of cubic meters of standing spruce trees. Not all the infested stands could be cleared in time, and priorities in management had to be set. Natural or man-made buffer zones of about 500 meters in width are frequently defined to separate differently managed stands in Central Europe. While the buffer zones seem to be effective in most of the cases, their impact has not been studied in detail. Beetle densities were therefore assessed in three case studies using pheromone traps along transects, leading from infested stands into spruce-free buffer zones. The results of the trap catches allow an estimation of the buffer zone influence on densities and the dispersal ofIps typographus. Beetle densities were found to decrease rapidly with increasing distance from the infested spruce stands. The trap catches were below high-risk thresholds within a few hundred meters of the infested stands. The decrease in catches was more pronounced in open land and in an urban area than in a broadleaf stand. Designed buffer zones of 500 m width without spruce can therefore very probably help to reduce densities of spreading beetles.

scholarly journals Remote Sensing Assessment of the Expansion of Ips typographus Attacks in the Chuprene Reserve, Western Balkan Range

Forests ◽  
2022 ◽  
Vol 13 (1) ◽  
pp. 39
Author(s):  
Georgi Georgiev ◽  
Margarita Georgieva ◽  
Stelian Dimitrov ◽  
Martin Iliev ◽  
Vladislav Trenkin ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Norway Spruce ◽  
Bark Beetle ◽  
Satellite Images ◽  
Vegetation Index ◽  
Near Infrared ◽  
Ips Typographus ◽  
Infrared Range ◽  
Electromagnetic Spectrum ◽  
Spruce Stands

The Chuprene Reserve was created in 1973 to preserve the natural coniferous forests in the Western Balkan Range in Bulgaria. The first infestations by European spruce bark beetle (Ips typographus) were registered in Norway spruce (Picea abies) stands in the mid-1980s. The aim of this study is to assess the damages caused by I. typographus in the Chuprene Reserve using remote sensing techniques – unmanned aerial vehicle (UAV) images, airborne images, and satellite images of European Space Imaging (EUSI), combined with terrestrial verification. High-resolution images in four bands of the electromagnetic spectrum and in a standard RGB channel were taken in 2017 via a multispectral camera ‘Parrot Sequoia’, integrated with a specialized professional UAV system eBee ‘Flying Wing’. The health status of Norway spruce stands in the reserve was assessed with the normalized difference vegetation index, based on the digital mixing of imagery captured in the red and near infrared range. The dynamic of bark beetle attacks was studied in GIS on the basis of maps generated from photographic surveys, airborne images taken in 2011 and 2015, and satellite images from 2020. In the UAV-captured area (314.0 ha), the size of Norway spruce stands attacked by I. typographus increased from 7.6 ha (2.4%) in 2011 to 44.9 ha (14.3%) in 2020. The satellite images showed that on the entire territory of the Chuprene Reserve (1451.9 ha), I. typographus killed spruce trees on 137.4 ha, which is 9.6% of the total area.

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