Asian Longhorned Beetle in New Jersey
CRITICALInsect
New Jersey has quarantine measures in place for Asian Longhorned Beetle. Don't move firewood or plant material out of regulated areas.
About Asian Longhorned Beetle
A large wood-boring beetle that attacks hardwoods including maples, elms, willows, and birches. Native to China and Korea, it was first detected in New York in 1996. Infestations can kill trees within a few years.
Symptoms to watch for
Round exit holes approximately 3/8 inch in diameter, frass (sawdust) at base of tree and branch crotches, pitted egg-laying sites on bark, branch dieback in upper canopy
Trees at risk in New Jersey
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Treatment options
Detection and Removal
Infested trees and nearby high-risk host trees are removed and chipped or burned under USDA APHIS quarantine protocols. The primary eradication strategy where infestations are detected early.
Systemic Insecticide Treatment
Imidacloprid trunk injection or soil application on high-value trees in quarantine zones as a preventive measure. Not a substitute for removal of confirmed infested trees.
Recommended Products & Tools
Helpful supplies for managing Asian Longhorned Beetle. Always read and follow label directions, and confirm a diagnosis before treating.
Knocks down soft-bodied pests like aphids, mites, and scale crawlers.
Smothers overwintering eggs and crawlers; dormant or summer rates.
Soil-applied protection taken up by the tree for season-long control.
Sharp, clean cuts to remove affected wood — a tree-care essential.
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Browse all New Jersey arborists →Frequently asked questions
Is Asian Longhorned Beetle in New Jersey?
New Jersey has quarantine measures in place for Asian Longhorned Beetle. Don't move firewood or plant material out of regulated areas.
What does Asian Longhorned Beetle look like?
Round exit holes approximately 3/8 inch in diameter, frass (sawdust) at base of tree and branch crotches, pitted egg-laying sites on bark, branch dieback in upper canopy
What trees does Asian Longhorned Beetle affect in New Jersey?
It affects American Sycamore, Sugar Maple, Red Maple, American Elm, Paper Birch, Weeping Willow. Susceptibility varies by species.
How do I treat Asian Longhorned Beetle?
Options include: Detection and Removal, Systemic Insecticide Treatment. Confirm the diagnosis before treating, and consider a certified arborist for high-value trees.