Person:
Kuhn, Carola

Profilbild

ORCID

Nachname

Kuhn

Vorname

Carola

Affiliation

Deutschland, Umweltbundesamt, Fachgebiet IV.1.4 - Gesundheitsschädlinge und ihre Bekämpfung

Forschungsvorhaben

Organisationseinheiten

Logo der Organisationseinheit
Organisationseinheit

Filter

2014 - 20195

Einstellungen

Anfangsdatum: 2014Enddatum: 2019

Suchergebnisse

Gerade angezeigt 1 - 5 von 5
  • Vorschaubild nicht verfügbar
    Veröffentlichung
  • Vorschaubild nicht verfügbar
    Veröffentlichung
    Bettwanzen - Erkennen, Vorbeugen, Bekämpfen
    (2017) Kuhn, Carola; Vander Pan, Arlette; Deutschland. Umweltbundesamt
  • Vorschaubild
    Veröffentlichung
    Bettwanzen - Erkennen, Vorbeugen, Bekämpfen
    (2017) Kuhn, Carola; Vander Pan, Arlette; Deutschland. Umweltbundesamt
  • Vorschaubild nicht verfügbar
    Veröffentlichung
    First mass development of Aedes albopictus (Diptera: Culicidae)̶its surveillance and control in Germany
    (2017) Becker, Norbert; Schön, Stefanie; Klein, Alexandra-Maria; Kuhn, Carola
    The Asian tiger mosquito Aedes albopictus has undergone a dramatic expansion of its range in the last few decades. Since its first detection in 2007 in Germany at the motorway A5 coming from Italy via Switzerland to Germany, it has been continuously introduced by vehicles, most probably from Italy. After a hint from an alert gardener in an allotment garden area in Freiburg, Southwest Germany, in 2015, a surveillance programme was started focusing on the garden area and adjacent areas as well as most of the cemeteries as potential infestation areas. The surveillance programme confirmed a high infestation of the allotment garden. The container index (CI) exceeded almost 30% in August 2015. In lethal gravid Aedes traps (GATs) and BG-Sentinel traps, 4038 adults were caught. It could be proven that the Aedes population is more or less still spatially restricted to the allotment garden area which is adjacent to a train station where trucks from Novara, Italy, arrive loaded on trains. Outside the garden area, only a few breeding sites with developmental stages and adults were found within a radius of approximately 600 m from the highly infested garden area. It is most likely that Ae. albopictus females are constantly introduced as ĺblind passengers̷ to Freiburg via trucks from Italy to Freiburg, Germany. After the first detection of the mass development of Ae. albopictus immediate and comprehensive control measures were initiated to reduce or even eliminate the Aedes population. Citizen awareness, especially of the gardeners, was increased by providing thorough information about the biology and control of Ae. albopictus. Beside environmental management, tablets based on Bacillus thuringiensis israelensis (Bti) were applied. The success of the control activities by the gardeners is reflected by the data gained during monthly inspection of the garden plots. The number of gardens without any container increased from 17% in July to 22% in August and 35% in September, 2015, resulting in a successful reduction of the Ae. albopictus population. The study underlines the importance of a comprehensive surveillance programme to assess the population density of Ae. albopictus as a basis for integrated control activities. Quelle: http://link.springer.com
  • Vorschaubild nicht verfügbar
    Veröffentlichung
    A novel simulated-use test for determining the efficacy of insecticides against bed bugs (Hemiptera: Cimicidae)
    (2019) Kuhn, Carola; Krücken, Jürgen; Schmolz, Eric; Vander Pan, Arlette
    The common bed bug Cimex lectularius L. has undergone a worldwide expansion in recent years, due to increased opportunities for dispersal and development of insecticide resistance. For successful control, efficacy testing of products against bed bugs and determination of insecticide resistance under practical conditions are of outstanding importance. A new test system mimicking the practical use situation of residual insecticides was developed and evaluated. Bed bugs were attracted by CO2 and heat to cross surfaces treated with alpha-cypermethrin and bendiocarb. In contrast to the complete efficacy of alpha-cypermethrin (less than 1% surviving bed bugs [with one exception of 5%]), only 45.3, 46, and 29% of insecticide-susceptible bed bugs showed lethal damage 7 d after contact with freshly bendiocarb-treated wallpaper or insecticide aged for 1 or 2 wk. Results show that the efficacy of different insecticides can be assessed with this new test system. Moreover, susceptibility to deltamethrin of five bed bug field strains, collected from infested apartments in Berlin, Germany, was determined in a filter paper contact bioassay. Resistance ratios (RRs) ranged between 4.3 and 20.7. In the novel simulated-use test, efficacy of alpha-cypermethrin was tested against the bed bug strain with the highest RR. In contrast to the insecticide-susceptible laboratory strain, alpha-cypermethrin was not effective against the field strain, where 26-50% of the bed bugs survived and even laid eggs. These results provide evidence for the presence of practically relevant pyrethroid resistance in bed bugs in Germany. © The Author(s) 2019