Scientific name: Trichoferus campestris Faldermann (syn. Hesperophanes campestris)
Native range: Asia and portions of eastern Europe
Past finds of Chinese longhorned beetle have not resulted in regulatory actions due to the isolated finds of small numbers of beetles. However, regulatory actions including restricting movement of host material, control actions or eradication measures could be taken in the future in response to an infestation. This insect should not be confused with the Asian longhorned beetle, which is a different pest of concern.
The velvet longhorned beetle has been detected in Quebec, Canada, and in a number of states in the U.S. A single beetle was captured in Minneapolis, Minnesota in 2010 as part of a USDA trap survey for invasive wood-boring insects. Follow up visual surveys did not find any local infestations. However, a single beetle was captured in each of 2014 and 2015 by USDA trap surveys near the Minneapolis / St Paul International Airport. The MDA and USDA are investigating if these were isolated occurrences or evidence of a local infestation.
Larvae overwinter in wood and pupate in spring. Adults emerge from wood and are active from June to August. Adults mate and females lay eggs on the bark of trees. Larvae hatch from eggs and tunnel under the bark and eventually into the wood. A single generation takes at least one year and could take two to complete.
Identification of this species is difficult due to a multitude of related species that may be found in the same types of trees. Larval life stages will not be identifiable to species. Identification of adult beetles will require an entomologist to distinguish them from related species. The adult beetle is about ½- ¾ inches long.
Many species of longhorned beetles have a similar appearance.
Host Plants and Impact
Preferred hosts of the velvet longhorned beetle are apple and mulberry. Other potential hosts in Minnesota include ash, birch, cedar, elm, fir, grape, larch, locust, maple, mountain ash, oak, pine, spruce and willow. This beetle is reported to infest healthy trees as well as stressed or dying trees as well as cut wood. Larval feeding under bark and in wood can stress or kill trees and reduces marketability of wood. Feeding damage can reduce yield of fruit trees.
The ultimate pest potential of this insect in North America is yet to be determined. In most locations where beetles have been trapped it has not been possible to document a local infestation or pest impact. The exception has been Utah, where a significant presence of Trichoferus campestris has been documented and pest impact is being evaluated. Contact the MDA via Arrest the Pest if you suspect the presence of velvet longhorned beetle in Minnesota.
Last Updated: June 21, 2016
Minnesota Department of Agriculture (MDA), 625 Robert Street N, St. Paul, MN 55155-2538, email@example.com