Laurence Berville, PhD
  • Home
  • Research
  • Experiences
    • Teaching
  • OUTREACH
    • Publications
    • Talks
    • Posters
    • Professionnal reports and consultancies
    • Documentary & Exhibition
    • Media
  • COLLABORATORS
  • Photos
  • CV
  • Contacts
Discover the challenges and questions that inspire my research and the ecosystems and landscapes I work in.

 Welcome / Bienvenue

2020 Entomology virtual annual meeting

9/11/2020

 
Hello everyone. On Wednesday (11th), I will present our poster by Ignacio Ruiz-Cristi, Dr. Laurence Berville, Dr. Eric Darrouzet.

The use of heat against the invasive hornet Vespa velutina: Toward a biodiversity-friendly method to destroy colonies

Picture
The Yellow-legged hornet, Vespa velutina var nigrithorax (Hymenoptera: Vespidae) is an Asian native species who had been unintentionally introduced in France around 2004 and then spread into Europe. Now that his eradication is impossible, it has been considered a species of Union concern, which requires Member states to implement control strategies.
Picture
Picture
This invasive predator has adapted well to its new environment and is nowadays a major threat to beekeeping activities, mostly by capturing returning honey bees foragers (Apis mellifera) at the beehive entrances. The overarching objective of this study was to assess the thermal resilience of the hornets to develop a green control method mimicking the effective collective defense mechanism of Apis cerana.
Indeed, defensive bee balling (“heat ball”) is particularly pronounced in the Asian honeybees A. cerana in response to hornet attacks.Here, different temperatures and thermal systems were tested on individuals according to their sex, castes, and developmental stages.

 First, two temperatures protocols were tested: instantaneous (“Flash”) versus a gradual increase (“Gradual”) to assess the resilience of the hornets. The resilience of individuals decreased significantly with the raised of temperatures. Larvae were the most resistants. Secondly, dry and steam airflow was compared. The most sudden (under 13 sec) and effective method appeared to be when steam is used. This short time frame before death could prevent hornets to react and/or flee. Further studies are necessary to determine the potential use of this method against V. velutina full colonies in natura.
Nearly 3,200 entomologists joined us for over two weeks of on-demand presentations and posters; livestream plenary and symposia; networking video chats; an online exhibit hall.

    Archives

    May 2025
    April 2025
    March 2025
    January 2025
    December 2024
    September 2024
    July 2024
    June 2024
    April 2024
    March 2024
    January 2024
    November 2023
    September 2023
    April 2023
    March 2023
    February 2023
    January 2023
    December 2022
    October 2022
    September 2022
    August 2022
    July 2022
    April 2022
    February 2022
    January 2022
    December 2021
    November 2021
    October 2021
    September 2021
    August 2021
    July 2021
    May 2021
    April 2021
    March 2021
    February 2021
    January 2021
    December 2020
    November 2020
    October 2020
    September 2020
    June 2020
    May 2020
    April 2020
    March 2020
    November 2019
    September 2019
    July 2019
    May 2019
    April 2019
    March 2019
    January 2018
    September 2017
    May 2017
    March 2017
    January 2017
    August 2016
    June 2016
    December 2015
    July 2015
    May 2015
    October 2014
    July 2014
    May 2014
    August 2013
    June 2013
    April 2013
    March 2013
    January 2013
    December 2012
    August 2012
    June 2012
    May 2012
    November 2011
    November 2010
    October 2010
    August 2010
    July 2010
    April 2010
    November 2009
    June 2009
    May 2009
    November 2008
    August 2008
    July 2008

Powered by Create your own unique website with customizable templates.
  • Home
  • Research
  • Experiences
    • Teaching
  • OUTREACH
    • Publications
    • Talks
    • Posters
    • Professionnal reports and consultancies
    • Documentary & Exhibition
    • Media
  • COLLABORATORS
  • Photos
  • CV
  • Contacts