Overwintering Migration of the Double-Spined Spruce Bark Beetle <i>Ips duplicatus</i> (Sahlberg, 1836) (Coleoptera; Curculionidae)

The double-spined bark beetle, <i>Ips duplicatus</i>, is an example of a species whose economic importance has increased in many European countries over the past decade. Many aspects of its life cycle remain unknown, complicating its management. <i>I. duplicatus</i> adults ov...

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Main Authors: Markéta Davídková, Lenka Kleinová, Petr Doležal
Format: Article
Language:English
Published: MDPI AG 2023-01-01
Series:Forests
Subjects:
Online Access:https://www.mdpi.com/1999-4907/14/1/131
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author Markéta Davídková
Lenka Kleinová
Petr Doležal
author_facet Markéta Davídková
Lenka Kleinová
Petr Doležal
author_sort Markéta Davídková
collection DOAJ
description The double-spined bark beetle, <i>Ips duplicatus</i>, is an example of a species whose economic importance has increased in many European countries over the past decade. Many aspects of its life cycle remain unknown, complicating its management. <i>I. duplicatus</i> adults overwinter in forest litter, which makes the removal of infested trees during winter ineffective. Therefore, this study focuses on the mechanisms and timing of <i>I. duplicatus</i> overwintering migration into the forest litter. Only 2.2% of adult <i>I. duplicatus</i> overwintered under the bark of spruce logs stored outdoors from August 2016 to March 2017. In all, 94.4% of the beetles emerged and burrowed in forest litter. Migration began in late August, peaked in mid-September, and lasted until mid-October. At that time, forest litter collected at the base of an infested tree contained an average of 154.7 ± 23.9 <i>I. duplicatus</i>. Catches of migrating adults on glue stripes proved that the beetles walked down the trunk on days when the average daily temperature reached 10–15 °C. Based on the results, we suggest that trees infested with <i>I. duplicatus</i> that have completed their development into adults should be removed no later than September. Sanitation cutting in the following months is not effective against this pest.
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spelling doaj.art-75c93c290a9a44c882b6d784b10f67522023-11-30T22:18:10ZengMDPI AGForests1999-49072023-01-0114113110.3390/f14010131Overwintering Migration of the Double-Spined Spruce Bark Beetle <i>Ips duplicatus</i> (Sahlberg, 1836) (Coleoptera; Curculionidae)Markéta Davídková0Lenka Kleinová1Petr Doležal2Biology Centre, Institute of Entomology, Czech Academy of Sciences, 37005 České Budějovice, Czech RepublicFaculty of Science, The University of South Bohemia in České Budějovice, 37005 České Budějovice, Czech RepublicBiology Centre, Institute of Entomology, Czech Academy of Sciences, 37005 České Budějovice, Czech RepublicThe double-spined bark beetle, <i>Ips duplicatus</i>, is an example of a species whose economic importance has increased in many European countries over the past decade. Many aspects of its life cycle remain unknown, complicating its management. <i>I. duplicatus</i> adults overwinter in forest litter, which makes the removal of infested trees during winter ineffective. Therefore, this study focuses on the mechanisms and timing of <i>I. duplicatus</i> overwintering migration into the forest litter. Only 2.2% of adult <i>I. duplicatus</i> overwintered under the bark of spruce logs stored outdoors from August 2016 to March 2017. In all, 94.4% of the beetles emerged and burrowed in forest litter. Migration began in late August, peaked in mid-September, and lasted until mid-October. At that time, forest litter collected at the base of an infested tree contained an average of 154.7 ± 23.9 <i>I. duplicatus</i>. Catches of migrating adults on glue stripes proved that the beetles walked down the trunk on days when the average daily temperature reached 10–15 °C. Based on the results, we suggest that trees infested with <i>I. duplicatus</i> that have completed their development into adults should be removed no later than September. Sanitation cutting in the following months is not effective against this pest.https://www.mdpi.com/1999-4907/14/1/131overwinteringsanitation cuttingbark beetlesforest protection
spellingShingle Markéta Davídková
Lenka Kleinová
Petr Doležal
Overwintering Migration of the Double-Spined Spruce Bark Beetle <i>Ips duplicatus</i> (Sahlberg, 1836) (Coleoptera; Curculionidae)
Forests
overwintering
sanitation cutting
bark beetles
forest protection
title Overwintering Migration of the Double-Spined Spruce Bark Beetle <i>Ips duplicatus</i> (Sahlberg, 1836) (Coleoptera; Curculionidae)
title_full Overwintering Migration of the Double-Spined Spruce Bark Beetle <i>Ips duplicatus</i> (Sahlberg, 1836) (Coleoptera; Curculionidae)
title_fullStr Overwintering Migration of the Double-Spined Spruce Bark Beetle <i>Ips duplicatus</i> (Sahlberg, 1836) (Coleoptera; Curculionidae)
title_full_unstemmed Overwintering Migration of the Double-Spined Spruce Bark Beetle <i>Ips duplicatus</i> (Sahlberg, 1836) (Coleoptera; Curculionidae)
title_short Overwintering Migration of the Double-Spined Spruce Bark Beetle <i>Ips duplicatus</i> (Sahlberg, 1836) (Coleoptera; Curculionidae)
title_sort overwintering migration of the double spined spruce bark beetle i ips duplicatus i sahlberg 1836 coleoptera curculionidae
topic overwintering
sanitation cutting
bark beetles
forest protection
url https://www.mdpi.com/1999-4907/14/1/131
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