Updated situation of Anoplophora chinensis in Switzerland
In Switzerland, Anoplophora chinensis (Coleoptera: Cerambycidae – EPPO A2 List) was first found in July 2006 in the municipality of Boswil (Aargau canton). At this location, only 1 adult female and 1 larva were found in association with 1 lot of bonsai trees (6 Acer palmatum plants) which had been imported from Japan. Before destruction of this lot, a careful examination and dissection of all 6 A. palmatum plants revealed only 1 exit hole, thus indicating that the single female adult caught was the only one which had emerged from this hole. In addition, 2 larval galleries could be found: one was connected to the exit hole mentioned above and the other must have been bored by the single living larva which had been found. Although, it could have been concluded that the establishment of the pest was most unlikely (no chance to establish a progeny), official and annual surveys have been conducted in Boswil until 2013. Sniffer dogs were additionally used in 2012 and 2013 to detect the pest. As no specimens or signs of presence of A. chinensis were detected, it can be concluded that A. chinensis no longer occurs in Boswil.
The Swiss NPPO also recalled that in 2014, 1 adult of A. chinensis was found in a private garden in Sirnach (Thurgau canton - EPPO RS 2014/182). Since this isolated record, no further findings have been made but official measures (including surveys) are still being implemented before eradication can be declared.
The situation of Anoplophora chinensis in Switzerland can be described as follows: Transient, actionable, under surveillance.
Sources
NPPO of Switzerland (2012-12).