Disruptions like that--as well as from wildfire, changing land use and increased development--provide openings for invasive species and pathogens, such as Japanese barberry shrubs that are favored by Lyme disease-carrying ticks, the
hemlock woolly adelgid, and the emerald ash borer.
The
hemlock woolly adelgid, a sap-sucking relative of the aphid, is a big threat to the species, and the shrubs may need to be treated with horticultural oils to prevent infestation.
The
hemlock woolly adelgid, an aphid-like insect native to Asia, now infests 43 New York counties.
Eastern Hemlock Infestation: Potential Geographic Distribution of the
Hemlock Woolly Adelgid in Michigan Forests.
I read with interest Nicolas Brulliard's article in the Spring issue of the magazine about the
hemlock woolly adelgid attacking eastern hemlock trees in Shenandoah National Park ["Saving Goliath"].
Currently, the
hemlock woolly adelgid is attacking hemlock stands across North America, and the most effective solution is a combination of the neonicotinoids imidacloprid and dinotefuran, Kreutzweiser said.
Trunk injection of imidacloprid was conducted using the Mauget system on Eastern hemlocks, Tsuga canadensis (L.) Carriere (Pinales: Pinaceae), to determine its effectiveness on the
hemlock woolly adelgid, Adelges tsugae Annand (Aphidomorpha: Adelgidae) (Eisenback et al.
The
hemlock woolly adelgid is a poppyseed-sized invasive insect that hitched a ride from southern Japan - probably on an ornamental hemlock tree - and landed in Richmond, Va., in 1951.
Bugs like the
hemlock woolly adelgid, the southern pine beetle, and the tick are unable to survive extreme cold temperatures, although generally when an invasive species has established a new home, it probably won't disappear completely, despite the weather.
The reason being, is that the bitter cold kills the hemlock's adversary, the
hemlock woolly adelgid, a tiny insect pest.
Similar means of dispersal have been demonstrated for
hemlock woolly adelgid, A.