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Seasonal flight patterns of Ips typographus in southern Sweden and thermal sums required for emergence

Öhrn, Petter and Långström, Bo and Lindelöw, Åke and Björklund, Niklas (2014). Seasonal flight patterns of Ips typographus in southern Sweden and thermal sums required for emergence. Agricultural and forest entomology. 16:1, 1-23
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Official URL: http://dx.doi.org/10.1111/afe.12044

Abstract

1 The spruce bark beetle Ips typographus is the major tree-killing bark beetle in Eurasia. To increase knowledge about its seasonal flight patterns and also about the thermal sums required for emergence a field study was conducted in southern Sweden from 2006-2010.
2 Flight began on average 27 April (after 47 degree-days (dd) > 5°C). More than 50% of flight activity occurred after mid-June, and continued to mid-August.
3 Re-emergence of parental beetles after they had produced the first brood started on average 24 May (after 122 dd). Continued flight and oviposition demonstrated that sister broods were frequent. A much higher proportion of parental beetles re-emerged from trees colonized in May (95%) than in July (20%). Beetles that colonized trees late had to accumulate a much higher thermal sum before re-emerging (400 dd).
4 Filial beetles began to emerge on average 29 June (after 437 dd), and started to fly in early July, giving rise to at least a partial second generation in each year. A much higher proportion of filial beetles had emerged from trees colonized in May (75%) than in July (15%).
5 Knowledge of these region-specific flight patterns and the associated thermal sums required for emergence will facilitate efficient pest management by enabling the timely removal of fallen and standing weakened host trees. The obtained data will also be useful for parameterization of models that predict the population dynamics in a warmer climate.

Authors/Creators:Öhrn, Petter and Långström, Bo and Lindelöw, Åke and Björklund, Niklas
Title:Seasonal flight patterns of Ips typographus in southern Sweden and thermal sums required for emergence
Series/Journal:Agricultural and forest entomology (1461-9555)
Year of publishing :2014
Volume:16:1
Page range:1-23
Publisher:Wiley-Blackwell
ISSN:1461-9555
Language:English
Publication Type:Journal article
Refereed:No
Article category:Scientific peer reviewed
Version:Submitted version
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
Agrovoc terms:phenology, pest management, Insecta
Keywords:degree-days, flight activity, re-emergence, pest management, phenology, spruce bark beetle, voltinism
URN:NBN:urn:nbn:se:slu:epsilon-e-1756
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-1756
ID Code:10962
Faculty:S - Faculty of Forest Sciences
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
Deposited By: Petter Öhrn
Deposited On:16 Jan 2014 08:33
Metadata Last Modified:22 May 2015 23:05

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