Cold tolerance of the invasive oak lace bug, Corythucha arcuata

Author:

Paulin Márton J.1,Eötvös Csaba B.1,Zabransky Petr2,Csóka György1,Schebeck Martin2ORCID

Affiliation:

1. Forest Research Institute, Department of Forest Protection University of Sopron Mátrafüred Hungary

2. Institute of Forest Entomology, Forest Pathology and Forest Protection, Department of Forest and Soil Sciences University of Natural Resources and Life Sciences Vienna, BOKU Vienna Austria

Abstract

Abstract The North American oak lace bug (OLB), Corythucha arcuata, is an invasive species in Europe and a serious threat to oak‐dominated forests. Survival at low temperatures is one major factor determining the spread of invasive insects. Thus, we studied key traits, that is, cold‐tolerance strategy, supercooling points (SCP) and chilling‐related mortality, of overwintering adults to assess their potential to withstand harsh winters. Samples for SCP measurements were collected once a month from November 2020 until March 2021 at three different locations in Hungary; specimens for chilling experiments were sampled in November 2020, January 2021 and March 2021. SCPs of overwintering adults ranged from −29.68 to −7.49 °C, with only moderate variation among months; C. arcuata is a freeze‐avoidant species. Mortality rates of adults exposed to two sub‐zero temperatures above the SCP (−3 and −5 °C) for 1, 2 and 3 weeks ranged between 0% and 69.1%, suggesting that OLB has a moderate risk to die from chilling injuries. Exposure time and sampling date affected mortality, with lowest survival rates after 3 weeks, collected in March 2021.

Publisher

Wiley

Subject

Insect Science,Agronomy and Crop Science,Forestry

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