11 research outputs found
Three alien bark and ambrosia beetles (Coleoptera, Curculionidae, Scolytinae) new to Switzerland
Get PDFIdentifying alien species is important to ensure the early detection of biological invasions and survey shifts in species distributions in the context of global change. Here, we report on three alien bark and ambrosia beetles newly detected in Switzerland: Cyclorhipidion distinguendum (Eggers, 1930), C. pelliculosum (Eichhoff, 1878), and Hypothenemus eruditus (Westwood, 1834). These species were recorded for the first time during a comprehensive survey of saproxylic beetles accross major forest types and along an altitudinal gradient during the entire growing season in the southern Alps, in the canton of Ticino. Their local abundance and number of occurrences accross different lowland forest habitats, including alluvial forests of national importance, indicates that all three species are already naturalized. Given their polyphagy, it is likely that all three species will become more extensively distributed across Switzerland, with a yet unknown environmental impact
Entwicklung von synthetischen ALB-Trainingshilfsmitteln für die Spürhundearbeit
No full textDer Asiatische Laubholzbockkäfer (Anoplophora glabripennis, kurz: ALB) ist ein Bockkäfer, der 2001 seinen Weg nach Europa fand. Er ist als Quarantäneschaderreger eingestuft und muss in Europa bekämpft werden. Eine der Möglichkeiten zum Aufspüren befallener Bäume ist der Einsatz von Spürhunden. Die Einstufung des ALB als Quarantäneschädling bringt große Probleme bei der Verwendung von Trainingsmaterial mit sich. Da es sich zudem um biologisches Material handelt, das geruchchemisch Änderungen und Variationen unterworfen ist, und da die für den Hund relevanten Geruchsstoffe nicht bekannt sind, ist es häufig schwierig, geeignete und frische Geruchsträger als Trainingshilfsmittel zur Verfügung zu stellen
Worldwide tests of generic attractants, a promising tool for early detection of non-native cerambycid species
No full textA large proportion of the insects which have invaded new regions and countries are emerging species,
being found for the first time outside their native range. Being able to detect such species upon arrival
at ports of entry before they establish in non-native countries is an urgent challenge. The deployment of
traps baited with broad-spectrum semiochemical lures at ports-of-entry and other high-risk sites could
be one such early detection tool. Rapid progress in the identification of semiochemicals for cerambycid
beetles during the last 15 years has revealed that aggregation-sex pheromones and sex pheromones are
often conserved at global levels for genera, tribes or subfamilies of the Cerambycidae. This possibly allows
the development of generic attractants which attract multiple species simultaneously, especially when such
pheromones are combined into blends. Here, we present the results of a worldwide field trial programme
conducted during 2018–2021, using traps baited with a standardised 8-pheromone blend, usually complemented with plant volatiles. A total of 1308 traps were deployed at 302 sites covering simultaneously
or sequentially 13 European countries, 10 Chinese provinces and some regions of the USA, Canada,
Australia, Russia (Siberia) and the Caribbean (Martinique). We intended to test the following hypotheses:
1) if a species is regularly trapped in significant numbers by the blend on a continent, it increases the probability that it can be detected when it arrives in other countries/continents and 2) if the blend exerts an
effective, generic attraction to multiple species, it is likely that previously unknown and unexpected species can be captured due to the high degree of conservation of pheromone structures within related taxa.
A total of 78,321 longhorned beetles were trapped, representing 376 species from eight subfamilies, with
84 species captured in numbers greater than 50 individuals. Captures comprised 60 tribes, with 10 tribes
including more than nine species trapped on different continents. Some invasive species were captured in
both the native and invaded continents. This demonstrates the potential of multipheromone lures as effective tools for the detection of ‘unexpected’ cerambycid invaders, accidentally translocated outside their
native ranges. Adding new pheromones with analogous well-conserved motifs is discussed, as well as the
limitations of using such blends, especially for some cerambycid taxa which may be more attracted by the
trap colour or other characteristics rather than to the chemical blend
