Key CodeScientific NameCommon Name
1, 2, 3Adelges tsugaeHemlock Woolly Adelgid
1, 2, 3Agrilus planipennisEmerald Ash Borer
* 1, 2, 3* Anoplophora glabripennisAsian Longhorned Beetle
3Exomala orientalisOriental Beetle
1, 2, 3Lymantria disparGypsy Moth
* 1, 2, 3, 4* Solenopsis invictaRed Imported Fire Ant
1, 3Tomicus piniperdaPine Shoot Beetle
3Xylosandrus crassiusculusGranulate Ambrosia Beetle
3Xylosandrus germanusBlack Stem Borer


* Red Alert species: Species not yet established in Maryland but considered to be of high risk.

  1. Currently Regulated by state and/or federal law
  2. Widely recognized by biologists and natural resource managers to degrade natural resources and/or negatively impact native species
  3. Known to have a negative economic impact on agricultural or natural resources
  4. Known or potential negative impacts on human (or animal) health