Hylurgus ligniperda Fabricius
An infestation of a bark beetle species capable of vectoring pathogenic fungi was recently found in North America.
Name: Hylurgus ligniperda Fabricius
Animalia: Arthropoda: Insecta: Coleoptera: Scolytidae
Common Names: red-haired pine bark beetle; golden-haired bark beetle
Issues of Concern: Previously, single H. ligniperda adults were trapped in Monroe County, 20 miles west (upwind) of the Rochester site in both 1994 and 1995. Surveys conducted in spring and summer 2001detected small numbers of adult H. ligniperda at single locations in two adjacent counties (Wayne and Ontario), as well as two locations in Monroe county. Surveys in five other adjacent counties were negative.
Adult H. ligniperda are attracted to fresh stumps, slash and logging debris for breeding. In unhealthy Pinus spp., the beetle usually breeds in thick bark near the base of the stem or in large exposed roots. Newly emerged adults may attack seedlings and stressed pole-sized trees.
Pathways: Hylurgus ligniperda is occasionally intercepted at U. S. ports in association with solid wood packing materials from Europe. Dispersal on Christmas trees is unlikely because the adults primarily infest stumps and roots and are not flying when the trees are harvested.
Hosts: Several species within the genus Pinus (pines).
Quarantines: Hylurgus ligniperda is a quarantine-significant pest for numerous countries.
A recent study by the USDA Forest Service found Lindgren funnel traps with high release alpha-pinene (625 mg/day = 5 standard lures) + high release ethanol (1000 mg/day) to be the most effective of the trap-lure combinations they tested. Other lures tested in this study also proved effective, but to a lesser degree. Intercept panel traps and Theysohn traps may be used in conjunction with high release alpha pinene + high release ethanol. Lindgren funnel traps should be hung from a trap rod with top of trap appox. 6 feet from the ground, with the ethanol attractand hung from the top funnel down through the inside of the funnels below. The alpha pinene should be attached below the ethanol, and these attractants should not touch each other.
In 2001, H. ligniperda appeared to complete two generations in New York, with the first developing from May to mid-July and the second from mid-July to September. Adult flight activity was heaviest from September to November, corresponding with the second generation's emergence. However, there was no similar increase in July, suggesting that brood adults continued to breed in the same stumps in which they developed.
Phytosanitary Alert System
Pest Alert www.pestalert.org
Prepared on: 01/24/2002