CBP Finds Destructive Asian Long-Horned Beetle In Improperly Heat-Treated Shipment From Romania

U.S. Customs and Border Protection says the highly invasive Asian long-horned beetle was found in a shipment from Romania that contained wood pallets that may not have been properly heat treated to eliminate pests.

CBP agriculture specialists at a rail yard in Port Huron, Mich., were inspecting cargo from Romania on March 17 when they discovered frass, or solid insect waste, “a telltale sign of more robust insect activity.” Further examination revealed live Asian long-horned beetle larvae.

It marked the first detection of the Asian long-horned beetle in the Port Huron area since November 2021, CBP said. The invasive species can cause significant damage to hardwood trees including maples, and is a “major concern” in North America, where it disrupts both forest and urban ecosystems, killing valuable forest trees and shade and park trees.

“Our nation’s agriculture industry is constantly at risk from pests and disease not known to occur in the U.S.,” Area Port Director Jeffrey Wilson said in a statement. “This interception by our highly skilled agriculture specialists showcase our continued commitment to safeguarding American agriculture and protecting public health.”

CBP said the beetles were found among wood pallets that were “stamped in a manner consistent with heat treatment,” but officials believe the heat treatment process “may not have been executed properly.” Untreated wood packaging material can introduce pests and pathogens, and heat treatment, as outlined by the Interim Commission on Phytosanitary Measures of the International Plant Protection Convention, is the international standard.

“This discovery underscores the vital role our agriculture specialists play in protecting the nations natural resources and economy. The Asian Long Horned Beetle is a destructive invasive species that threatens our forests and urban landscapes,” said Director of Field Operations Marty Raybon. “Every successful interception, like this one, prevents potential devastation to our hardwood trees and reinforces our commitment to keeping invasive pests from harming our environment and economy.”