scholarly journals Disparity of Phoresy in Mesostigmatid Mites upon Their Specific Carrier Ips typographus (Coleoptera: Scolytinae)

Insects ◽  
2020 ◽  
Vol 11 (11) ◽  
pp. 771
Author(s):  
Marius Paraschiv ◽  
Gabriela Isaia
Keyword(s):  
Picea Abies ◽  
Norway Spruce ◽  
Mite Species ◽  
Ips Typographus ◽  
The Body ◽  
Immature Stages ◽  
Body Parts ◽  
Large Area ◽  
Important Pest ◽  
Symbiotic Fungi

Ips typographus Linnaeus, 1758, the most important pest of Norway spruce (Picea abies Linnaeus, 1753) from Eurasia has damaged, in the last decades, a large area of forest in Romania. Associations between beetles and their symbiotic fungi are well known compared to beetle-mite relationships. The objectives of the study are to determine: (i) the diversity of mites species associated with I. typographus in a local outbreak from Central Romania; (ii) the mite’s preferences concerning the body parts of their carriers; and (iii) how phoresy changes during seasonal flight activity of the host. A total of 7896 adult I. typographus were analyzed and six mite species (both adults and immature stages) were found: Dendrolaelaps quadrisetus Berlese,1920, Proctolaelaps fiseri Samsinak, 1960, Trichouropoda polytricha Vitzthum, 1923, Histiostoma piceae Scheucher, 1957, Uroobovella ipidis Vitzthum, 1923, and Uroobovella vinicolora Vitzthum, 1926. Most mites were observed under the carriers’ elytra (46.8%), while 26.7% and 25.8% were seen on the thorax and elytral declivities, respectively. Mite phoresy peaked in the spring corresponding to the dispersal flight of the carrier. A smaller peak in phoresy occurred in the summer during the second beetle generation.

scholarly journals Merocoenoses of cambioxylophagous insect fauna of Norway spruce (Picea abies [L.] Karst.) with focus on bark beetles (Coleoptera: Scolytidae) and types of tree damage in different gradation conditions

2010 ◽  
Vol 56 (No. 10) ◽  
pp. 474-484 ◽  
Author(s):  
E. Kula ◽  
W. Ząbecki
Keyword(s):  
Picea Abies ◽  
Norway Spruce ◽  
Bark Beetles ◽  
Fungal Pathogens ◽  
Ips Typographus ◽  
Insect Fauna ◽  
Spruce Bark ◽  
Standing Trees ◽  
Spruce Stands ◽  
Endemic Population

Research on merocoenoses of cambioxylophagous insect fauna of Norway spruce (Picea abies [L.] Karst.) was carried out in spruce stands of different age in the area with an endemic population (Moravian-Silesian Beskids, Czech Republic) and in the area with an epidemic population (Beskid Żywiecki, Poland) of the eight-toothed spruce bark beetle Ips typographus (L.). The structure of merocoenoses was characterized separately for standing trees attacked by bark beetles, trees struck by lightning, trees affected by fungal pathogens and wind-felling and trees in the form of snags and fragments. The occurrence of cambioxylophagous insects, mostly bark beetles (Coleoptera: Scolytidae), was compared between the study areas with emphasis on dominant facultative primary bark beetles and types of damage to spruce trees.  

scholarly journals The alpha-cypermethrin coated net for protecting Norway spruce wood against bark beetles (Curculionidae, Scolytinae)

2015 ◽  
Vol 55 (2) ◽  
pp. 156-161 ◽  
Author(s):  
Iwona Skrzecz ◽  
Wojciech Grodzki ◽  
Mieczysław Kosibowicz ◽  
Dorota Tumialis
Keyword(s):  
Picea Abies ◽  
Norway Spruce ◽  
Bark Beetles ◽  
Early Spring ◽  
Ips Typographus ◽  
High Efficacy ◽  
Thanasimus Formicarius ◽  
Spruce Wood ◽  
Research Material ◽  
Negative Effect

Abstract The study estimated the efficacy of a net coated with alpha-cypermethrin used to protect Norway spruce [Picea abies (L.) H. Karst] wood against bark beetle infestations. The inside of the net was coated with 100 mg/m2 of alpha-cypermethrin. The studies carried out in 2010 and 2011 took place in southern Poland in the Beskid Żywiecki and Beskid Sądecki mountains in P. abies stands threatened by Ips typographus (Linnaeus, 1758). The research material consisted of wood logs taken off of 70–80-year-old P. abies trees. The logs were wrapped in the net in the early spring before spring swarming of bark beetles. The unwrapped logs were considered as the study controls. An evaluation of the treatments was performed after 2 months. The evaluation was based on the counting of bark beetles galleries found after removing the bark from the wrapped and unwrapped logs. There were no insect galleries on the wrapped logs. The net was a barrier, on which bark beetles died. About 10 dead I. typographus beetles were found on 0.01 m2 of the net surface. On the bark from the unwrapped-control logs there were 3,156 galleries/entrance holes of bark beetles, in total, of which 73% belonged to I. typographus, 13% to Pityogenes chalcographus (Linnaeus, 1761), and almost 10% to Xyloterus lineatus (Oliv.). These results indicated the high efficacy of the net coated with alpha-cypermethrin used for the protection of Norway spruce wood against the bark beetles. At the same time, the net was found to have a negative effect on non-target entomofauna, mainly Hylobius spp., Thanasimus formicarius (L.), and Tetropium castaneum (F.). However, the use of a net did not affect other predatory (Carabidae) and parasitic (Ichneumonidae and Tachinidae) entomofauna.

Exogenous application of methyl jasmonate elicits defenses in Norway spruce (Picea abies) and reduces host colonization by the bark beetle Ips typographus

Oecologia ◽  
2006 ◽  
Vol 148 (3) ◽  
pp. 426-436 ◽  
Author(s):  
Nadir Erbilgin ◽  
Paal Krokene ◽  
Erik Christiansen ◽  
Gazmend Zeneli ◽  
Jonathan Gershenzon
Keyword(s):  
Picea Abies ◽  
Methyl Jasmonate ◽  
Norway Spruce ◽  
Bark Beetle ◽  
Ips Typographus ◽  
Host Colonization ◽  
Exogenous Application

scholarly journals Effects of Volatile Emissions of Picea abies Fresh Debris on Ips duplicatus Response to Characteristic Synthetic Pheromone

2012 ◽  
Vol 40 (1) ◽  
pp. 308 ◽  
Author(s):  
Mihai-Leonard DUDUMAN ◽  
Iuliana VASIAN
Keyword(s):  
Picea Abies ◽  
Norway Spruce ◽  
Volatile Emissions ◽  
Specific Host ◽  
Fresh Material ◽  
Synthetic Pheromone ◽  
Ips Duplicatus ◽  
Important Pest ◽  
Olfactory Stimuli ◽  
Natural Range

Ips duplicatus is an important pest of Norway spruce (Picea abies) planted outside of its natural range. This species uses olfactory signals to identify the spruce trees favourable for colonisation. The knowledge of the beetles’ response to these stimuli is important for managing this pest. Therefore, the response of Ips duplicatus to a specific synthetic pheromone was investigated under some natural sources of volatile emissions characteristic of Norway spruce. The pheromone traps were installed in two types of forests: one with fresh and large Norway spruce stumps and piles of branches, releasing large amounts of host volatile substances (terpenes and alcohols) and one without such fresh material. The experiment was repeated in three pairs of sites located in plantations out of the natural range of Norway spruce. Finally it was found that Ips duplicatus beetles, regardless of sex, have been concentrated in areas where large amounts of fresh material were available, confirming that Ips duplicatus beetles are using both natural pheromones and specific host volatiles as olfactory stimuli in searching for breeding material.

scholarly journals Ophiostomatoid fungi associated with Ips typographus (L.) on Picea abies [(L.) H. Karst.] and Pinus sylvestris L. in north-eastern Poland

2011 ◽  
Vol 74 (4) ◽  
pp. 345-350 ◽  
Author(s):  
Robert Jankowiak ◽  
Jacek Hilszczański
Keyword(s):  
Picea Abies ◽  
Pinus Sylvestris ◽  
Norway Spruce ◽  
Scots Pine ◽  
Bark Beetle ◽  
Ips Typographus ◽  
Ophiostomatoid Fungi ◽  
Spruce Bark Beetle ◽  
Spruce Bark ◽  
North Eastern

This study dealt with the species distribution and frequency of ophiostomatoid fungi associated with the bark beetle Ips typographus on Norway spruce and Scots pine in north-eastern Poland. At all locations high spruce bark beetle damage has occurred in 2002-2003. Fungi were isolated from beetles and from brood systems of trees infested by the spruce bark beetle. The ophiostomatoid fungi were represented by 13 species. A similar spectrum of ophiostomatoid fungi as that recorded from <em>Picea abies</em> was associated with <em>I. typographus</em> on <em>Pinus sylvestris</em> trees. The most frequent ophiostomatoid species isolated from beetles, phloem and sapwood of Norway spruce were <em>O. bicolor</em> and <em>O. penicillatum</em>. The frequency of occurrence of ophiostomatoid fungi varied significantly among the examined locations. <em>O. bicolor</em> was the most frequently found species on Scots pine infested by <em>I. typographus</em>. The potential role of ophiostomatoid fungi in the epidemiology of <em>I. typographus</em> is discussed. Additionally, we also recorded how the ophiostomatoid fungi associated with spruce bark beetle could grow into phloem and sapwood of <em>Pinus sylvestris</em> trees.

Mite communities (Acari, Mesostigmata) associated with Ips typographus (Coleoptera, Scolytidae) in managed and natural Norway spruce stands in Central Europe

2012 ◽  
Vol 7 (5) ◽  
pp. 910-916 ◽  
Author(s):  
Dariusz Gwiazdowicz ◽  
Jacek Kamczyc ◽  
Ewa Teodorowicz ◽  
Jerzy Błoszyk
Keyword(s):  
Norway Spruce ◽  
Bark Beetle ◽  
Bark Beetles ◽  
Management Practices ◽  
Mite Species ◽  
Ips Typographus ◽  
Ne Poland ◽  
Set Up ◽  
Mite Communities ◽  
The Impact

AbstractPrevious studies have suggested that forest management practices can influence bark beetle populations as well as those of some associated insects. However, the impact on bark beetle-associated mites, which occur in bark beetle galleries in large numbers, have not yet been studied. The objective of this study was to compare mesostigmatid mite communities associated with the Norway spruce pest Ips typographus in managed and natural forest stands separated by spruce-free belt. The study sites were located in Białowieża National Park (NE Poland) as well as in the Izery Mountains (Szklarska Poręba Forest District — SW Poland), which were destroyed in 1981–1987 by an ecological disaster. In total, 30 Borregard pipe traps containing the commercial attractant Ipsodor W (Chemipan, Poland) were set up at each study site and collected in August 2010. In total, 7214 bark beetles and 1804 mites were collected which were classified into 16 species. We observed differences in the total abundance of mites as well as the total number of recorded mite species. The communities were quite similar, and were generally dominated by populations of Trichouropoda polytricha, Dendrolaelaps quadrisetus and Uroobovella ipidis. The Shannon and Evenness indexes as well as the mean number of mites per sample were not significantly different between forests.

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