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Section Symposium

Physiology, Biochemistry, and Toxicology

Basic and Applied Chemical Ecology in Cerambycid Beetles

Host preference and chemical ecology of Saperda tridentata: Preliminary results

Sunday, November 5, 2023
10:40 AM – 10:55 AM ET
Location: Gaylord National Resort & Convention Center, Maryland 1-2
In-Person
Saperda tridentata (Olivier, 1795) (Coleoptera: Cerambycidae) is a longhorn beetle species which has gained importance after recent interceptions at Italian ports on rough wood elm logs imported from North America. This beetle feeds on leaves and bark of young twigs of elms, laying eggs on weakened stems in which larvae develop. However, its potential host range in Europe is unknown. Given the likelihood of further introductions of S. tridentata in Europe, there is an urgent need to characterize its behavior and potential impact on European trees, as well as to develop efficient monitoring strategies. To address this knowledge gap, we carried out choice and no-choice feeding and oviposition bioassays on ten species of European broadleaved trees. Our findings indicate that S. tridentata feeds readily on foliage of European elm species, but less so on European species of Acer and Populus.Results from no-choice bioassays testing oviposition and development from egg to adult on stem sections of European trees are pending. In addition, preliminary trapping experiments showed that adults, particularly females, were significantly attracted to stressed elms vs. healthy elms. Chemical analyses are ongoing to determine which host volatiles elicit attraction and whether males emit sex/aggregation pheromones. Our efforts aim to provide a more comprehensive understanding of S. tridentata host preference and chemical ecology, offering valuable insights for the development of effective surveillance strategies.