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Hemlock woolly adelgid spread in Erie County. ... Damage done by the HWA elsewhere in Pennsylvania had prompted the Pennsylvania Department of Conservation and Natural Resources to craft a ...
The current leading biological control method of hemlock woolly adelgid is Sasajiscymnus tsugae, [originally called Pseudoscymnus tsugae]. [11] S. tsugae is a black lady beetle that is relatively host-specific, feeding only on three known aldegid species, including HWA.
Join conservationists for a hands-on workshop at Cumming Nature Center to identify and survey the tree-killing insect, hemlock woolly adelgid.
This beetle was discovered in 1992 while feeding on hemlock woolly adelgid in its natural range of Japan. Since 1995, the Pennsylvania Department of Conservation and Natural Resources 's Bureau of Forestry has released hundreds of thousands of adult S. tsugae beetles into affected hemlock forests of the eastern United States to determine its ...
Eastern hemlock populations in North America are threatened in much of their range by the spread of the invasive Hemlock woolly adelgid, which infests and eventually kills trees. Declines in population from hemlock wooly adelgid infestation have led to Tsuga canadensis being listed as Near Threatened on the IUCN Red List.
The hemlock woolly adelgid (Adelges tsugae), an adelgid introduced to the United States from Asia in 1924, threatens Carolina hemlock, which is as susceptible as the related eastern hemlock. [8] The trees may also be attacked by elongate hemlock scale (Fiorinia externa). [7]: 15–16 [10]
Described in 2011, it feeds exclusively on hemlock woolly adelgid (Adelges tsugae), an invasive insect species that is destroying huge numbers of hemlock trees in eastern North America. [2] It has shown promise as a biological control agent in field trials. [3]
L. nigrinus larva feeding in an A. tsugae ovisac. Laricobius nigrinus is a species of tooth-necked fungus beetle in the family Derodontidae. [1] [2] It is native to western North America, and it is being studied as a biological control agent for the hemlock woolly adelgid. [3]