Various Host-Insect Interrelations in Host-Finding and Colonization Behavior of Bark Beetles on Coniferous Trees

1976 ◽  
pp. 229-235
Author(s):  
J. A. Rudinsky
Keyword(s):  
Bark Beetles ◽  
Host Finding ◽  
Host Insect ◽  
Coniferous Trees ◽  
Colonization Behavior

ATTRACTION OF LASCONOTUS INTRICATUS KRAUS. (COLEOPTERA: COLYDIIDAE) TO THE AGGREGATION PHEROMONE OF THE FOUR-EYED SPRUCE BARK BEETLE, POLYGRAPHUS RUFIPENNIS (KIRBY) (COLEOPTERA: SCOLYTIDAE)

1992 ◽  
Vol 124 (1) ◽  
pp. 1-5 ◽  
Author(s):  
W.W. Bowers ◽  
J.H. Borden
Keyword(s):  
Bark Beetle ◽  
Aggregation Pheromone ◽  
Bark Beetles ◽  
Black Spruce ◽  
Inhibitory Effect ◽  
Host Finding ◽  
Bornyl Acetate ◽  
Spruce Bark Beetle ◽  
Spruce Bark ◽  
High Degree

AbstractThe cylindrical bark beetle, Lasconotus intricatus Kraus., is attracted to multiple-funnel traps baited either with black spruce logs infested with male four-eyed spruce bark beetles, Polygraphus rufipennis (Kirby), or the male-produced aggregation pheromone, 3-methyl-3-buten-1-ol. The addition of the host terpenes, bornyl acetate and β-pinene, to 3-methyl-3-buten-1-ol reduced the attraction of L. intricatus. 3-Carene, myrcene, and α-pinene appeared to have a partial inhibitory effect. Catches in spring and summer disclosed a high degree of temporal coincidence between the two species. We hypothesize that L. intricatus utilizes the aggregation pheromone of P. rufipennis as a host-finding kairomone.

scholarly journals Situation of Armillaria spp. and Heterobasidion spp. in Slovenia

2019 ◽  
Vol 25 (1) ◽  
pp. 2-9
Author(s):  
Ana Brglez ◽  
Nikica Ogris
Keyword(s):  
Norway Spruce ◽  
Scots Pine ◽  
Bark Beetles ◽  
Abies Alba ◽  
Deciduous Trees ◽  
Silver Fir ◽  
Coniferous Trees ◽  
Current State ◽  
Common Causes ◽  
Pinus Spp

Species of the genus Armillaria and Heterobasidion are among the most common causes of stem and root rot in Slovenia. Armillaria spp. infects deciduous and coniferous trees, while Heterobasidion spp. mainly threatens Norway spruce (Picea abies), pines (Pinus spp.), and silver fir (Abies alba). On the basis of the data about the sanitary felling of infected trees, we estimated the current state and calculated the proportions represented in total felling, total sanitary felling, total sanitary felling due to diseases, in wood stock, and in increments from 2013 to 2017. Since 2014, there has been a constant increase in the sanitary felling of deciduous and coniferous trees due to infections with Armillaria spp. In 2017, 32,849 m3 of timber were harvested due to Armillaria spp. Given the present situation, we assume that the amount of sanitary felling will continue to increase, but it will not account for large shares in wood stock or increment (< 1 %). In 2017, sanitary felling of infected conifers represented 27.6 % of all sanitary felling due to diseases. In the case of deciduous trees, the share was lower, i.e. 7.1 %. Armillaria spp. was the main cause of sanitary felling due to disease (51.9 %) in the Postojna forest management unit (FMU), while elsewhere shares of up to 10 % were recorded. With Heterobasidion spp., the amount of felling is decreasing over the years. In 2017, 33,922 m3 of wood, accounting for 15.7 % of the total sanitary felling due to disease, were felled due to Heterobasidion spp. A comparison of the felling of Norway spruce, silver fir, and Scots pine due to Heterobasidion spp. shows the different proportions of felling within the total sanitary felling due to the diseases. In Norway spruce, it is on average 79.5 %, in silver fir 12.9 %, and in Scots pine 34.3 %. We assume that the volume of timber harvested due to Heterobasidion spp. will gradually decrease over the years due to the lower wood stocks of Norway spruce, which has recently been hit by numerous natural disasters and infestation of bark beetles. However, the incidence will be higher due to climate change affects.

scholarly journals Violation of the structure of the forest biocenosis under the action of stem pests and methods of controlling their numbers

2020 ◽  
Vol 23 (12) ◽  
pp. 46-57
Author(s):  
Svitlana Lohinova ◽  
Hryhoriy Khaietskyi
Keyword(s):  
Bark Beetles ◽  
Negative Impact ◽  
Climatic Factors ◽  
Field Work ◽  
Forest Steppe ◽  
Main Trunk ◽  
Coniferous Trees ◽  
Mass Reproduction ◽  
Practical Standpoint ◽  
Coniferous Plantations

The study of the forest ecosystem as an integral part of the erosion system is associated with a number of issues. The forest is the most powerful and effective tool in the fight against soil erosion, droughts and hot winds, as well as an environmental stabilising factor in general. Human forestry activities in the fight against the drying of coniferous plantations from an outbreak of mass reproduction and spread to large areas of stem pests under the influence of a complex of ecological and climatic factors, is one of the serious factors disrupting the structure of the forest biocenosis. The search for alternative solutions to the localisation of this problem requires a detailed study of the behaviour of the most common bark beetles of coniferous trees in climatic and environmental conditions that developed during 2011-2020. During the period of active temperatures in 2019, namely from the second decade of April to the third decade of October, work on stationary supervision and laboratory field work was carried out to solve the problem of localisation of stem pests of Polissya and Forest-Steppe pine plantations. Methods of laying out hunting trees and pheromone traps were used. In practice, the pest did not inhabit hunting trees and only a few representatives and very small entomophagous traps fell into the traps. Instead, it inhabited healthy stands of trees, where the catchers were located. It is established that from the scientific and practical standpoint, the studied regularity of pine drying centres is clearly confined to highways and timber roads, as well as the area of distribution of relevant species of trunk pests and weakening zones of pine stands in some areas for other reasons. It is proved that to preserve the ecological potential of coniferous plantations and reduce the negative impact of xylophagous insects, it is necessary to design preventive and biological methods of control of the main trunk pests of coniferous trees

Bark Beetles of the Genus Carphoborus Eichhoff (Coleoptera: Scolytidae) in North America

1954 ◽  
Vol 86 (11) ◽  
pp. 502-526 ◽  
Author(s):  
Stephen L. Wood
Keyword(s):  
New Mexico ◽  
North America ◽  
Tree Growth ◽  
Bark Beetles ◽  
New World ◽  
Economic Importance ◽  
Old World ◽  
Coniferous Trees ◽  
The North

The genus Carphoborus is widely distributed in the Holarctic realm. It occurs from the northern limits of tree growth south in the Old World to India and northern Africa and in the New World to Baja California, New Mexico, Mississippi, and Florida.All of the North American species breed in the inner bark of coniferous trees of the genera Pinus, Picea, and Pseudotsuga. Branches that are being shaded out or are broken, but still hanging in the tree, are generally preferred for the construction of galleries. A few species have been reported from slash; however, they are usually not aggressive or abundant enough to survive in competition ivith other bark beetles normally found in slash. The economic importance of the genus is not great; the hahit of breeding in the unthrifty lower branches of coniferous trees contributes slightly toward accelerating the natural pruning of the trees and consequently aids in the production of a higher quality of timber.

Bark beetles and their galleries: well-known niches for little known fungi on the example of Geosmithia.

2004 ◽  
Vol 56 (1-2) ◽  
pp. 1-18 ◽  
Author(s):  
Alena Kubátová ◽  
Miroslav Kolařík ◽  
Karel Prášil ◽  
David Novotný
Keyword(s):  
Bark Beetles

Wald und Klimawandel in der inneralpinen Trockenregion Visp

2012 ◽  
Vol 163 (12) ◽  
pp. 481-492
Author(s):  
Andreas Rigling ◽  
Ché Elkin ◽  
Matthias Dobbertin ◽  
Britta Eilmann ◽  
Arnaud Giuggiola ◽  
...  
Keyword(s):  
Climate Change ◽  
Ecosystem Services ◽  
Forest Management ◽  
Forest Ecosystem ◽  
Bark Beetles ◽  
Forest Ecosystems ◽  
Field Experiments ◽  
Forest Monitoring ◽  
Management Interventions ◽  
Forest Ecosystem Services

Forest and climate change in the inner-Alpine dry region of Visp Over the past decades, observed increases in temperature have been particularly pronounced in mountain regions. If this trend should continue in the 21st Century, frequency and intensity of droughts will increase, and will pose major challenges for forest management. Under current conditions drought-related tree mortality is already an important factor of forest ecosystems in dry inner-Alpine valleys. Here we assess the sensitivity of forest ecosystems to climate change and evaluate alternative forest management strategies in the Visp region. We integrate data from forest monitoring plots, field experiments and dynamic forests models to evaluate how the forest ecosystem services timber production, protection against natural hazards, carbon storage and biodiver-sity will be impacted. Our results suggest that at dry low elevation sites the drought tolerance of native tree species will be exceeded so that in the longer term a transition to more drought-adapted species should be considered. At medium elevations, drought and insect disturbances as by bark beetles are projected to be important for forest development, while at high elevations forests are projected to expand and grow better. All of the ecosystem services that we considered are projected to be impacted by changing forest conditions, with the specific impacts often being elevation-dependent. In the medium term, forest management that aims to increase the resilience of forests to drought can help maintain forest ecosystem services temporarily. However, our results suggest that relatively rigid management interventions are required to achieve significant effects. By using a combination of environmental monitoring, field experiments and modeling, we are able to gain insight into how forest ecosystem, and the services they provide, will respond to future changes.

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