In July, observers found a small cluster of hemlock woolly adelgid (HWA) (Adelges
isugae) on a tree branch in the Adirondacks.
Global climate change is increasing the rate of range expansion for many species across the globe, creating an urgency to understand the variables involved in predicting the spread of the hemlock woolly adelgid (HWA; Adelges
tsugae) throughout forests of the eastern United States.
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.
Sasajiscymnus tsugae (Coleoptera: Coccinellidae) has been reared as a predator that specifically targets the Hemlock Woolly Adelgid (HWA, Hemiptera: Adelgidae: Adelges
tsugae), a very destructive pest of the Eastern and Carolina Hemlock.
The tree crown distribution of hemlock woolly adelgid, Adelges
tsugae (Hem., Adelgidae) from randomized branch sampling.
More recent perturbations include the introduction of the balsam woody adelgid (Adelges
piceae), causing significant mortality of Fraser fir at the upper elevation limits of northern hardwood distribution, and the beech bark disease on American beech (Fagus grandifolia) throughout [1, 9].
Oviposition, development, and feeding of Scymnus (Neopullus) sinuanodulus (Coleoptera: Coccinellidae): a predator of Adelges
tsugae (Homoptera: Adelgidae).
Release in North America and review of bionomics in Europe of insect predators of the balsam woolly aphid, Adelges
piecae (Ratz.) (Homoptera: Adelgidae).
caroliniana Engelm) are currently declining rapidly due to infestation by the hemlock woolly adelgid (HWA, Adelges
tsugae Annand) and little regeneration is expected (Orwig and Foster, 1998; Preisser et al., 2011).
Eastern hemlock is threatened with decline due to the hemlock woolly adelgid (Adelges
tsugae) with outbreaks causing widespread mortality of hemlock in Connecticut and elsewhere in the Appalachian Mountains (Orwig et al.
But over the last few decades, the eastern and Carolina hemlocks have been under attack by a small sucking insect called the hemlock woolly adelgid (Adelges
tsugae), or HWA.
Eastern hemlock is currently being threatened by the hemlock woolly adelgid (Adelges
tsugae), a defoliating insect.